Tiêu chuẩn iso 12647 7 2016

© ISO 2016 Graphic technology — Process control for the production of halftone colour separations, proof and production prints — Part 7 Proofing processes working directly from digital data Technologi[.]

Graphic technolog y — Proc ess c ontrol

Part 7:

Te h olo ie gra hique — Co trôle de s proce ssus de co fec tion de

sélec tions co leurs tramée s, d’é r u e s et de tira e s —

Partie 7: Proce s sus d’é r u e tra ailla t directement à p rtir de

COPYRIGHT PROTECTED DOCUMENT

© ISO 2016, P blshed in Sw itz rlan

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written permis ion Permis ion c n be req esed from either ISO at the ad r es below or ISO’s member bod y in the c u try of

F reword i v

Introduction v

1 Sc ope 1

2 Nor mati ve r eferenc es 1

3 Terms and definitions 1

4 Req irements 3

4.1 Colour difer enc measurement 3

4.2 Data fies, simulation of scr eens 3

4.2.1 Data delve y 3

4.2.2 S r een freq ency 3

4.2.3 S r een angle 3

4.2.4 Dot sha e 3

4.2.5 Halfone pr oof scr eening 3

4.3 Pr oof print 3

4.3.1 General 3

4.3.2 Pr oofing subs r ate colour and g los 4

4.3.3 C louration of printed p rt 4

4.3.4 Gamut 5

4.3.5 Pe manenc of proofing subs rate an printed p rt 5

4.3.6 Repeatabi ty of pr oof printing 6

4.3.7 C lourant rub r esis anc 6

4.3.8 In set glos 7

4.3.9 Tone v lue r epr oduction lmit 7

4.3.10 Reproduction of vig netes 7

4.3.11 Imag e r eg is e and r esolving p we 7

4.3.12 Mar g in information 7

5 Test metho s 8

5.1 Viewing conditions 8

5.2 Contr ol strip 8

5.3 A dditional tes o je t 9

5.3.1 Resolution 9

5.3.2 Primary an se on ary pr oc s colours 9

5.3.3 Resolving p we 9

5.3.4 Uniformity 9

5.4 Colour measur ement 9

5.5 Measur ement of g los 1

5.6 Visual a praisal of pr oof-pr es -print matches 1

A nne x A (normative) Technical requirements for pr oofing c onfor mity 11

A nne x B (normative) Rub resistanc e of the pr oof c olo rant 15

A nne x C (normative) Oute gamut patches .18

A nne x D (informative) Or ganizational c er tificatio r outines for visual appraisal of

proof-pr int pres -pr int matches 21

Biblog raphy 23

ISO (he Int ernational Org nization for Stan ardization) is a worldwidefede ation of national s an ards

b dies (ISO membe b dies) The work of pr p ring Int ernational Stan ards is normaly car ied out

through ISO t ech ical committ ees Each membe b dy int er st ed in a subje t for w hich a t ech ical

committ ee has be n es a lshed has the right t o be r pr sent ed on that committ ee Int ernational

org nizations, g ove nmental an non-g ove nmental, in laison with ISO, also take part in the work

ISO cola orat es closely with the Int ernational Ele trot ech ical C mmis ion (IEC) on al matt ers of

ele trot ech ical s an ardization

The proc d r s used t o develo this document an those int en ed for it furthe maint enanc ar

desc ibed in the ISO/IEC Dir ctives, Part 1 In p rticular the dife ent a pro al c it eria ne ded for the

dife ent ty es of ISO document should be not ed This document was draft ed in ac ordanc with the

edit orial rules of the ISO/IEC Dir ctives, Part 2 ( e www.iso.org dir ctives)

A tt ention is drawn t o the p s ibi ity that some of the element of this document ma be the subje t of

p t ent right ISO shal not be held r sponsible for identifying any or al such p t ent right Detais of

any p t ent right identified d ring the develo ment of the document wi be in the Introd ction an / r

on the ISO ls of p t ent de larations r c ived ( e www.iso.org p t ent )

Any trade name used in this document is information given for the convenienc of use s an does not

cons itut e an en orsement

For an ex lanation on the meaning of ISO spe ific t erms an ex r s ions r lated to conformity as es ment,

as wel as information a out ISO’s adhe enc to the Wor ld Trade Org nization (WTO) principles in the

Te h ical Bar ie s to Trade (TBT) se the folowing URL: www.iso.org/ iso/for word.html

The committ ee r sp nsible for thisdocument is ISO/TC1 0, Gra hic techn lo y

This third edition canc ls an r plac s the se on edition (ISO 1 647-7 :2 1 ), w hich has be n

t ech icaly r vised with the folowing chang es:

— a n mbe of anomales identified b in us ry ex e t ha e be n ad r s ed;

— subs rat e sele tion an measur ment spe ification has be n modified t o r fle t in us ry practic ;

— a pro imat ely eq iv lent CIEDE2 0 colour dife enc v lues ha e be n ad ed;

— basic sup ort for sp t in s has be n ad ed;

— wording has be n updat ed t o r fle t cur ent t erminolo y an in us ry thin ing

A l s of al p rt in theISO 1 647 se ies can be fou d on the ISO websit e

ISO 1 647-1 se ves t o pro ide def initions, the g ene al principles, the g ene al orde , the mat erial t o be

co e ed in ISO 1 647- 2 t o ISO 1 647-8, the def inition ofthe data, the measur ment con itions, an the

r p rting s y le

This document r lat es t o the subje t of digital pro fing an es a lshes pro fing r q ir ment for the

mos demanding p rt of the printing an publshing market

This document spe ifies aim v lues (or set of aim v lues) an t ole anc s for the primary p ramet ers

spe if ied in ISO 1 647-1 for digital pro f printing Primary p ramet ers that def ine a printing con ition

inclu e sc e ning paramet ers (w he e a plca le), the colours of the solds, the colour of the print

subs rat e, colours of int ermediat e tint v lues an the t one curve This document also spe if ies t es

methods for those pro e ties of digital pro f print an their subs rat es that ar conside ed r lev nt

for s a le an r l a le pro fing con itions, an th s for a c rtification proc d r

The gra hic t ech olo y in us ry makes ext ensive use of pro f ing t o pr dict her n e ing of digital data

files b a wide v riety of high-definition, high-q alty of-pr s printing proc s es an a plcations

Each pr diction is based on a charact erization data set that defines a particular printing con ition

Ty ical y, the spe ified printing con ition is def ined through an Int ernational Color C nsortium (ICC)

profile or the as ociat ed charact erization data set, b th of w hich r lat e sour e data and colorimetric

v lues of the print ed colour Such data ma be de ived from printing con itions conforming t o the

pe tinent proc s s an ard of the ISO 1 647 se ies b in us ry trade groups or in ivid als

The purp se of a pro f print is t o simulat e the visual charact eris ics of the finished prod ction print

prod ct as closely as pos ible In orde t o visual y mat ch a p rticular printing con ition, pro f ing

proc s es r q ir a set of p ramet ers t o be spe if ied that ar not ne es ari y identical t o those put

forward in ISO 1 647-1 or anothe p rt of ISO 1 647 This is caused b dife enc s in colourant spe tra

or phenomena such as glos , lght scatt er (within the print subs rat e or the colourant), an transp r ncy

In such cases, it is also fou d that pe trocolorimetry takes pr c denc over densit ometry

Anothe pro lem ar a is the mat ching of a double-sided prod ction print on a l ghtweight printing

subs rat e, such as oft en used in heat-set web an publcation gra ur printing, t o a digital pro f on

a nearly o aq e subs rat e If the pro f was prod c d using a colour manag ement prof ile based on

measur ment with w hit e b cking, the e wi l be an u a oida le visual an measura le dife enc

betwe n the pro f on the one hand an the prod ction print plac d on black on the othe han A

black b cking is r q ir d for double-sided prod ction printing on non-o aq e print , as spe if ied

in the pe tinent p rt of ISO 1 647 The p s ible oc ur enc of such dife enc s ne ds t o be wel

commu icat ed, in adv nc , t o al p rties conc rned

Hist oricaly, the e has be n no consist ency in the wa that eithe the charact erization data or the

c it eria an lmit for a satis act ory mat ch ha e be n pro ided This has led t o signif icant r d n ancy

an inconsist encies in the ev luation of pro fing sy st ems for dife ent, but simi ar, a plcations, an a

cos an time burden on the in us ry This document the efor att empt t o pro ide guidanc in this

ar a b pro iding spe if ications and as ociat ed t es ing proc d r s

An ex A summariz s the r q ir ment for the digital pro f print l st ed in the main b dy of this

documen these ar weight ed with r spe t t o their r lev nc in thr e ty ical situations:

— r q ir ment with w hich a pro f print, made for a particular printing con ition, mus comply if it

is t o be r fe enc d in a contract betwe n the print er an the pro ide of the digital data (Ce tified

Pro f Cr ation);

— r q ir ment with w hich a ven or’s pro fing sy st em, comprising hardwar an sof war , mus

comply if it is t o be conside ed ca a le of r la ly prod cing digital contract pro f for a p rticular

printing con ition (Ce tified Pro f ing Sy st em);

— r q ir ment with w hich a pro f print made for a p rticular printing condition mus comply w hen

t est ed in the f ield using only a control wedg e (Ce tified Field Pro f)

ISO 1 647-8 def ines r q ir ment for v ldation print Be ause data ar ex chang ed ele tronicaly

an visualzations of those data ar prod c d at multiple sit es, the e is a market ne d for def ined

r q ir ment for v ldation print t o promot e a degr e of consist ency throughout the workflow

Valdation print ar int ended t o beused at early s ag es of the print prod ction workflow, p rticularly

at the document design s ag e an ha e les s ring ent r q ir ment , p rticularly on colour f idelty, t o

alow their prod ction on les ela orat e an les cos ly devic s than ar r q ir d for contract pro f

Valdation print ar not int en ed t o r plac “contract pro f ” as spe ified in this document for

pr dicting colour on prod ction printing devic s It is ex e t ed that the modifications of the

r q ir ment for b th contract pro f an v ldation print , along with the r q ir ment for contract

pro f , wi contin e in the futur as in us ry r q ir ment an ima ing t ech olo ies develo

Graphic technolog y — Proc ess c ontrol for the pr oduction

Part 7:

This document spe ifies r q ir ment for sy st ems that ar used t o prod c hard-co y digital

pro f print int en ed t o simulat e a printing con ition defined b a set of charact erization data

R ecommen ations ar pro ided with r g rd t o a pro riat e t es methods as ociat ed with these

r q ir ment

2 Normati ve r eferences

The folowing document ar r fe r d t o in the t ext in such a wa that some or al of their cont ent

cons itut es r q ir ment of this document F or dat ed r fe enc s, only the edition cit ed a ples F or

un at ed r fe enc s, the lat es edition of the r fe enc d document ( inclu ing any amen ment ) a ples

ISO 1 7, Pa e , b ard a d p lps — Sta dard atmos phe e fr c onditio in a d tes tin a d proc edur fr

mo itorin the atmos phe e a d c onditio in o s amples

ISO 2 1 , Paints a d v rni shes — Determin tio o glos s v lue at 2 °, 6 0° a d 85°

ISO 3 64, G ra hic te h olo y a d p oto ra h — View in c onditio s

ISO 8 54-1, Pa e a d b ard — Meas ur ment o s pec ular glos s — Part 1: 7 ° glos s w ith a c on e gin beam,

ISO 1 640-1, Gra hic techn lo y — Prepr s s digital data excha ge — Part 1: CMYK s ta dard c olo r ima e

data (CMYK/SCID)

ISO 1 642- 2, G ra hic techn lo y — In ut data fr ch rac te i zatio o 4-c olo r proc es s printin — Part 2 :

Ex pa ded data s et

ISO 1 65 , Gra hi c tec hn log — S e t ral measur ment a d color i met r i c comp tati on fr gra hi c

art s i ma es

ISO 1 3 7 :2 14, G ra hic te h olo y — Commu ic atio o gra hic p pe pro erties

3 Terms and definitions

For the purp ses of this document, the terms an definitions given in ISO 1 647-1 an the folowing a pply

ISO an IEC maintain t erminolo ical data ases for use in s an ardization at the folowing ad r s es:

— IECEle tro edia: a aia le at ht p:/ www.ele tro edia.org

— ISO Onlnebrow sing plat orm:a ai a le at ht p:/ www.iso.org o p

dife enc betwe n two coloursof a pro imat ely the same lghtnes proje t ed ont o a cons ant lghtnes

plane in the CIELAB colour sp c

Not e 1t o entry: T is is calculat ed as

digital pro f print

digital hard-co y pro f

digital pro f(3.3) prod c d as a r fle tion co y on a pro fin s ubs trate (3.5)

3.5

pro fing substrate

printing subs rat e used for hard-co y pro fing proc s es

3.6

halftone pro f

pro f print made using the same sc e ning t echnolo y (g ene aly c ntr -weight ed halft one dot ) as the

int en ed prod ction printing

Not e 1to entry: This is done t o at empt t o prod ce (an therefore check for the e istence of) the same s re ning

art efacts, such as roset es, moiré, or aliasing patt erns, as e pect ed in the cor espon ing prod ction print One

pos ibility is t o b se pro f ing on the bitmap prod ced on the prod ction plat e or f ilm set er

3.7

primaries

set of proc s inks: cy n, mag enta, yelow and black

3.8

print stabiization perio

time ela sed sinc theprod ction of a pro f print unti a s a le colour is achieved

Not e 1t o entry: T is property is t o b specif ied by the man facturer

3 9

spot colo r inks

inks w hich ar not part of the set of proc s in s

Not e 1t o entry: Spot colour in s are of en used when printing bran colour

4 Requir ements

4.1 Colour difer enc e measurements

In pr vious r visions of this document, CIELAB 1 76 colour dife enc measur ment (ΔE*

b) we e

used as detaied in ISO 1 6 5 for normative colour dife enc measur ment

Conformanc with this document r q ir s the r p rting of al colour dife enc sas CIEDE2 0 (ΔE

0)

NOTE T e relationship of ΔE*

b

to ΔE

0varies throughout he colour space an there is no simple cor elation

b tween the two metric User are ad ised that some pro fs that are in conformance with ISO 1 647-7:2 1

may not b in conformance with this document an that some pro fs that are in conformance with this document

may not b in conformance with ISO 1 647-7 :2 1

4.2 Data fi es, simulation of s reens

4.2.1 Data deli very

Digital pro fing sy st ems should ac ept digital data del ve ed as PDF X data f iles as def ined in ISO 1 9 0

(al part ) or TIF /IT f iles as defined in ISO 1 6 9 Whe e TIF /IT files ar used, colour information

shal be inclu ed using ta 346 5 or ta 340 9 as def ined in ISO 1 6 9

PDF X r q ir s that he int en ed printing con ition be in icat ed Whe e the int ended printing con ition

is inclu ed in the r gis ry of charact erizations maintained b the Int ernational C lor C nsortium (ICC)

an the digital data ar cy n-mag enta-yelow-black (CMYK), the name used in the IC r gis ry isusualy

used for identification in leu of inclu ing an IC output profile If theint en ed printing condition isnot

inclu ed in said r gis ry, PDF X r q ir s that an IC output prof ile be inclu ed Ifthe data ar othe

than CMYK, the data ar r q ir d t o be defined colorimetricaly using an IC input prof ile or anothe

me hanism an an IC CMYK output prof ile is r q ir d t o be inclu ed; the r n e ing int ent t o be used

with the output prof ile is r q ir d t o be commu icat ed

4.2.2 Screen frequency

Halft one pro f should ha e the same sc e n fr q encies ( c e n rulngs) as the prod ction pr s print

t o be simulat ed within a t ole anc of ± /cm

4.2.3 Screen angle

Halft one pro f should ha e the same sc e n angles (with a t ole anc of ± ° as the prod ction print t o

be simulat ed

4.2.4 Dot shape

Halft one pro f should ha e the same g ene al dot ha e as the prod ction print t o be simulat ed

4.2.5 Halfo e pr oofs s r eening

Whe e halft one pro f ar used an the sc e n fr q ency, sc e n angle or dot sha e ar dife ent from

that ofthe prod ction pr s t o be simulat ed, these dife enc s shal be r p rt ed

4.3 Proof pr int

4.3.1 General

When ev luating an commu icating pro fing subs rat e pro e ties, the ls of r q ir d c it eria for

commu ication desc ibed in ISO 1 3 7 should be fol owed

4.3.2 Proofing substrate c olo r and g los

In an ideal situation, the digital pro fing subs rat e should be the same as the subs rat e t o be used for

prod ction printing As this ideal situation is seldom p s ible, the digital pro fing subs rat e shal fulfil

al of the folowing c it eria

a) The glos level of b th the printing subs rat e an pro f ing subs rat es shal be es imat ed as one of

matt e, semi-matt e or glos y eithe b the subs rat e man factur r or b measuring as desc ibed in

5.5 Matt e pro f ing subs rat es shal not be used t o make pro f for glos y printing subs rat es an

glos y pro fing subs rat es shal not be used t o make pro f for matt e printing subs rat es

b) The w hit e p int of the u print ed pro fing subs rat e shal alow a colorimetric mat ch of the

subs rat e of the int en ed printing con ition t o be simulat ed with a colour dife enc of les than or

eq al t o 3,0 ΔE

0

u it w hen measur d ac ording t o ISO 1 6 5

To as ur a w hit e point mat ch, the pro fing subs rat e should ha e a CIEL*v lue that is highe than the

subs rat e of the printing con ition t o be simulat ed

c) The pro f ing subs rat e should belong t o the same fluor sc nc clas ification as the prod ction

p pe Fluor sc nc clas ification in four levels offaint, low, mode at e, an high shal be made

using the t es ing proc d r s desc ibed in ISO 1 3 7 :2 14, 5.1

NOTE Fluores ence as def ined in ISO 1 3 7 is calculat ed by me suring D65 brightnes evaluated as per

ISO 2470-2 with UV inclu ed (UV) an UV ex clu ed (UV

ex) an taking the ratio UV/UV

ex(se ISO 1 3 7 for

details) Usual cate ories for fluores ence are faint, low, moderat e an high In practice, it is ofen useful to ad

an OBA fre cat eg ry in which case the faint cate ory is split into OBA fre an faint T e cate ories an rang s

for e ch are shown in Ta le 1

Table 1 — Fluores ence categ ories and rang es

4.3.3 C louratio of printed par ts

The measur ment con itions shal be asspe ified in 5.4;the digital control s rip spe ified in 5.2 an an

ISO 1 642- 2 complant chart shal be used

The CIELAB colour co rdinat es of the proc s colour sol ds shal a r e with the pe tinent aim v lues

of the printing con ition t o be simulat ed as given b the data ( e 4.2.1), within 3,0 ΔE

0

u it The

CIELAB metric h e dife enc for CMY shal not ex ce d 2,5

The v ria i ity of the colouration ac os the pro f print format is l mit ed b the pro ision that the

colours of nine measur ment locations evenly spac d on the t es o je t ( e 5.3.4), w hich ha e be n

print ed without prior modif ication in view of the printing con ition, shal ha e the folowing:

— a s an ard deviation of les than 0,5 each for v lues of L*, a*, an b*;

— a ma imum of 2,0 ΔE

0

u it between the a e ag e v lue an any one p int

The CIELAB colour co rdinat es of the control p t ches, defined in 5.2 or ISO 1 642- 2, shal a r e with

the pe tinent aim v lues of the printing con ition t o be simulat ed as given b the data ( e 4.2.1) within

the t ole anc s spe if ied in Ta le 2

If the pro f ing con itions ar such that the simulation of the prod ction printing subs rat e r q ir s

o e printing of the pro f ing subs rat e, the ma imum colour dife enc betwe n the o e print ed

pro f ing subs rat e an the prod ction printing subs rat e shal be les than or eq al t o 3,0ΔE

0unit

Table 2— A dditio al tolerances for co trol patches

Al patches specif ied in 5.2 ex cept spot colour in patches Ma imum ΔE

A CMY overprint s ale roughly replicating the neutral s ale for an avera e

printing con ition comprising a minimum of f ive patches spaced

ap ro imat ely u iform intervals ac os the tone s ale

NO E 1 The toleranc s per ain to the deviation of the pro f values f om the values of the chara teriz tion data of the

printin c n ition to be simulated

The spe if ic tion of Δ

0

t oleranc s lower han 2,5 is presently not pra tic l d e t o po r int er -model agre men however,

w hen the same ins rument is bein used t o make both set of me surement , it is re ommen ed that the t oleranc s be halved

If the f inal pro f print is su je ted to sur a e f inishin , the final c lour mig t deviate sig if ic ntly f om those of the

u finished print In this c se, a new pro fer or simulation prof ile or other adjus ment are req ired

Spot c lour in sold patches should be cle rly identified b the CIE AB c lour of the sold spot in on the print u s rate

There is no s an ard way to c mmu ic te the inten ed c lour of a tint of a spot in an so c mmu ic tion of spot in tint

aim values an toleranc s shal be determined b a separate agre ment between par icipant , for e ample b me ns of a

p ysic l referenc sample

NO E 2 Previous ver ions of this do ument used the met ic ΔH which is very u s able for diferenc s close to the neut al

a is an sothis has be n repla ed b chromaticnes diferenc Δ

hwhich provides a more relable me sure

4.3.4 Gamut

The 2 6 out er g mut p t ches of ISO 1 642- 2 shal be pro f print ed The a e ag e colour dife enc

betwe n actual an aim v lues for thosep t ches shal not ex ce d 2,5 ΔE

0

u it S e Annex Cfor the l s

of out er g mut p t ches of ISO 1 642- 2

Whe e multiple printing con itions ar sup ort ed b a pro f print er, this t es ma be a pled t o ensur

that the pro f print er colour g mut is sufficiently larg e t o alow al printing con itions t o be sup ort ed

efe tively

Sold an a r pr sentative set of tint , inclu ing at leas a 5 % tint w he e a def inition is a aia le, of al

sp t colours t o be simulat ed shal be pro f print ed The ma imum colour dife enc betwe n actual an

aim v lues for those p t chesshal not ex ce d 2,5 ΔE

0unit

NOTE ISO 17972-4 def ines an ex chang format (CxF/X-4) for spectral me surement data of in s to provide

a me ns t o characterize spot colour in s to al ow relia le printing an pro f ing of prod cts that have b en

designed using these in s

Spot colours w hich can ot besimulat ed b the pro f ing sy st em, such asw hen they ar out of g mut or

w he e spe ial inks ar used, shal be identif ied an pro f should be ac omp nied b a phy sical sample

of the r q ir d colour

4.3.5 Per manenc e of proofing substr ate and pr inted par ts

F our co ies of a t es form shal be pr p r d on the pro fing subs rat e w hich contains unprint ed part

an pat ches of print ed primaries an se on aries b th as sol ds an as midt ones C mbinations of al

of the proc s colours used b the pro f ing sy st em shal be inclu ed in thisset w hich ma inclu e mor

than four colourant

The four co ies of the tes form shal be s or d for a print s a i zation pe iod of at leas 24 h in the

dark u de s an ard atmosphe e ac ording to ISO 1 7 (at 2 °C ± 1 °C an a r lative h midity of

5 % ± 2 % RH)

The CIELAB colour v lues of the pro f ing subs rat e an the print ed pat ches shal be measur d ac ording

t o ISO 1 65 M1

Each of the four co ies ofthe t es form shal be subje t ed t o one of the folowing st orag e con itions:

a) 24 h at 2 °C ± 1 °C an at a r lative h midity of 2 % ± 2 % in the dark ;

b) 24 h at 40°C± 1 °Can a r lative h midity of 8 % ± 2 % in the dark ;

c) 1week at 40 °C ± 1 °C an at a r lative h midity of 1 % ± 2 % in the dark ;

d) l ght fas nes ex osur using a win ow glas filt er d xenon lamp with a level of ex osur of the

t es form cor esp n ing t o a lght fas nes rating of 3 using the blue wool t es as desc ibed in

ISO 1 040 F ading of blue wo l r fe enc 3 (A cid blue 8 ) should be used t o che k the dose

F or each of these tr atment , for the subs rat e an for al p t ches of the t es form, the ma imum colour

dife enc betwe n colour v lues of the pat ches befor an aft er the tr atment shal not ex ce d 2,5 ΔE

Print with rough surfac s ar g ene aly mor susc ptible t o fading but in some cases ha ing a pro f

with a surfac that is simi ar t o that of the prod ction print is mor important than ha ing a l ght fas

pro f an so these t ole anc s shal be r d c d t o alow the use of pro f with me hanical y rough

surfac s

The r ade should be awar that prod ction printing subs rat es an inks ar usualy les s a le than

ty ical inkjet-b sed pro fing subs rat es an inks, se R efe enc [1 ] It is the efor r commen ed t o

a ply this pe manenc t es t o pro f on prod ction printing subs rat es if the l fetime of such pro f is

of any conc rn

NOTE It is anticipated that win ow glas ap lication as des rib d in ISO 1 5-B0 , e.g optical f ilter , b

f itt ed t o minimize short-wavelength light les than 3 0 nm)

4.3.6 Repe tabiity of pr oof pr inting

The v ria i ity of the pro f print primary an se on ary colour sol ds an primary colour midt one

p t ches from one da t o the folowing shal not ex ce d a colour dife enc of 2,0 ΔE

0

u it Pat ches

should be measur d b the same ins rument an at the same p sition on the she t aft er the ven

or-spe ified warming -up pe iod an , if ne es ary, r calbration

4.3.7 C lourant rub r esistanc e

Using the t es a p ratus an method spe ified in Annex B, the timer q ir d b print ed solds t o r ach

me hanical s a i ity a ains a rub ing action should not ex ce d 3 min or the print ta i ization pe iod,

w hicheve is long er This t es shal be pe formed for each combination of mat erials and o e ating

con itions that thepro fing syst em sup ort

NOTE A period of 3 min was chosen b cause this is b lieved to represent the e pectation of the avera e

user Where the colour (as distinct from the rub resistance of the colourant) takes long r t o sta ilize, this

req irement can b relax ed

4.3.8 Ink set glos

The glos of sold t one colours should bevisualy simiar t o that of the prod ction print t o be simulat ed

The in set glos ma be spe if ied if de med ne es ary; the method spe ified in 5.5 shal be used

NOTE If the glos of the pro f print is substantial y chang ed by the ap lied colourants, a surface-f inishing

step might improve the situation S e 4.3.2

4.3.9 To e value repr oduction l mits

Tint int ermediat e betwe n the ( imulat ed) subs rat e w hit e an sol d shal trans e ont o the pro f in

a consist ent an uniform man e o e a t one v lue rang e that inclu es at leas the t one r prod ction

l mit of the printing con ition t o be simulat ed;se the p rt of ISO 1 647 that desc ibes proc s control

for thety e of printing t o be simulat ed

NOTE It is g od prepres practice that no ima e parts rely on tone values outside of the tone value

reprod ction limits of the prod ction printing proces

4.3.10 Reprod ction of vig net es

The t es o je t spe if ied in 5.3.2 shal show no easiy visible st eps within the t one v lue r prod ction

l mit ( e 4.3.9) if viewed u de ISO viewing con ition P1 in ac ordanc with ISO 3 64

4.3.11 Imag e r eg ister and r esol ving power

The ma imum deviation betwe n the imag e c ntr s of any two print ed colours shal not be larg er than

0,0 mm The r solving powe of the pro f print shal be such that C, M, K p sitive, non-se if, ty e of

2-point siz , r ve se (neg tive) of 8-point siz , and 2-p int r ve se lne ar legibly r prod c d; the t es

o je t pe ified in 5.3.3 shal be used

The a o e r q ir ment shal not a ply t o rough or me hanical y u s a le subs rat es such as new sprint

or t o cases w he e the t ole anc s for prod ction printing r gis ration ar subs antialy gr at er than

0,0 mm

NOTE 1 T is con ition usual y cor espon s t o an outp t ad res a ility of at le st 1 0 pix els per centimetre

NOTE 2 T is con ition inclu es the efects of colourant migration, if at al present

4.3.12 Mar g in infor matio

The fol owing information shal be pro ided an every digital pro f should inclu e the folowing

information as a h man-r ada le commentary l ne:

— conformanc level (“ Digital pro f ac ording t o ISO 1 647-7 :—” ;

— f ile name;

— digital pro f ing sy st em designation;

— subs rat e mat erial ty e;

— theprinting con ition simulat ed;

— time an dat e of prod ction;

— measur ment con ition: M0, M1, or M2

NOTE 1 T e intent of inclu ing the printing con ition is to identify this cle rly to a user The conventions used

t o in icate printing con itions vary but a g od way to do this would b to identify the name of a characterization

data set, for e ample using its name as re ist ered on the IC re istry or using the f ilename or prof ile des ription

ta of an IC prof ile that represents the printing con ition

It should also inclu e

— colourant y es,

— colour manag ement prof ile() used,

— rast er imag e proc s or (RIP) name an ve sion,

— scalng ( if a pled),

— ty e of co ting ( if a pled or simulat ed),

— time an dat e of las calbration,

— detai s of any spe ial data pr p ration, an

— ty e of p pe /s ructur simulation such asnoise or p tt erning ( if a pled)

When making a pro f from a PDF X document, the margin information shal inclu e the file name an

the dat e an time of the las modif ication an should inclu e the document ID When the document

ID is inclu ed, this shal be print ed as two hex s rings an the las f ive digit of each s ring should be

highlght ed in some wa in orde t o as is identif ication

NOTE 2 In some cases of recalibration, it is useful to re-prof ile the pro fer

5.1 View ing c onditions

V iewing of print shal be in ac ordanc with ISO 3 64 P1 or P2 viewing con ition

5.2 Contr ol str ip

A CMYK digital control s rip r pr senting the printing con ition t o be simulat ed shal be print ed on

eve y pro f The control element identif ied in the ls below should be inclu ed w hie ke ping the

t otal n mbe of p t ches within r asona le l mit To pro ide compatibi ity with charact erization data,

as many control p t ches as pos ible should be sele t ed from ink v lue combinations of ISO 1 642- 2

Control p t ches shal be sele t ed such that he folowing control pat ch ty es ar co e ed:

a) sold t ones of the chromatic primariesan their se on aries C,M, Y,R,G, an B (6 p t ches);

b) mid- an shadow t ones of the chromatic primaries an their se on aries C,M, Y,R,G, an B (1

pat ches);

c) black (K)t one scale with a minimum of six st eps that inclu es the sold;

d) a set of p t ches with CMY v lues chosen t o mat ch the colour of the p t ches def ined in c) as closely

as p s ible;

e) sele tion of c itical t ertiary colours such as flesh t ones, brown, aube gine, violet (e.g 1 p t ches);

f) simulat ed print subs rat e colour of the prod ction printing condition (1 p t ch);

g) sold t ones of al spot colour inks used in the document

NOTE 1 There are two practical def initions for grey which are sometimes contradictory: (i a colour having

the same a* an b* CIE AB values as the print substrate; (i a colour having the same a* an b* CIE AB values

as a halft one tint of similar L* value printed with black in T e lat er def inition is b lieved t o b useful in the

midtone an u wards where s the former is b lieved to work b st with highlight t ones

NOT 2 Grey b lance pat ches composed of suita le CMY mixtures serve a useful p rpose for q ick visual checks

of w hether the CMY t one v alues have chang ed, for e ample from one pro f print t o the ne t A single grey b lance

con ition is usual y not sufficient t o ensure an achromatic colour for al print substrat es an printing in s that are

used for a given printing con ition In ad ition, it usual y depen s on the particular black composition used

The L* scale of the black is usualy conside a ly gr at er than the thr e colour scale an car should be

taken t o ensur that the p t ches desc ibed in c) an d)a o e ar suita ly sp c d

5.3 Additional test objects

5.3.1 Resolutio

F or the visual det ermination of the r solving powe of the pro f ing proc s , the r solution chart S2

an S3 def ined in ISO 1 640-1 shal be used

5.3.2 Primary and sec ondary pr oc es c olour s

F or che ks of the primary an se on ary proc s colours (C, M, Y, K, M+Y, C Y, C M, an C M+Y), a t es

form comprising vignett e targ et such as the t es imag e S6 of ISO 1 640-1 should be used The length

of the vignett es should be such that they ar jus below the length w he e les than smo th beha iour is

visible for normal prod ction printing

5.3.3 Resol ving power

F or che ks on the r solving p we , a t es form comprising positive an r ve se ty e of a non-se if L tin

font with t ext iz s of 2, 3, 4, 5, 6, 7, an 8 p int an r ve se l nes with widths of 2, 3, an 4 p int should

be print ed both p ralel an normal t o the edg e of the print diag onal l nes ar not r q ir d) Thr e set

of p sitive t ext hould be print ed using 1 0 % cy n, 1 0 % mag enta an 1 0 % black R eve se printing

should use 1 0 % black-only b ckgrou d with w hit e k ock-out The samer gular b dy t ext ont hould

be used for al cases an al ins anc s of 2-p int t ext should be legible an al ins anc s of 2-point lnes

should bevisible

NOTE T is is simulation of the inten ed printing con ition an pres colourants are likely t o b simulated

by a colorimetric emulation involving multiple colourants on the targ t device

5.3.4 Unifor mity

F or che ks on uniformity, c eat e thr e print , each with an even tint ar a that fils the printa le format

of the pro f print er, using the folowing t one v lue combinations:

a) C: 6 %, M: 5 %, Y:5 %, K: 5 %;

b) C: 40 %, M:3 %, Y: 3 %, K: 3 %;

c) C: 2 %, M: 1 %, Y: 1 %, K: 1 %

NOTE T e most pop lar format or pro f printing is A3

5.4 Colour measur ement

Colour measur ment shal be made using an ins rument ( uch as a spe tro hot omet er from w hich

colorimetric v lues can be calculat ed) that is ca a le of r peat edly prod cing measur d v lues wel

within the t ole anc s spe if ied in this document The measur ment con ition of the ins rument should

be set t o use the CIE I luminant D5 an the 2° s an ard o se ve The CIELAB colour co rdinat es L*,

a*, b* shal be calculat ed as detaied in ISO 1 6 5 Charact erization data r pr senting a p rticular

measur ment con ition (M0, M1, or M2) shal be ve ified using an ins rument conf igur d t o use this

samemeasur ment con ition