Standard Finishing
Xerox4Over

Announcement

Collapse
No announcement yet.

Color registration and rich black standard's ISO 12647-2

Collapse
Canon
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • SteveSuffRIT
    replied
    Per ISO 12647-2 2013, section 4.3.5 Tolerancing for image position,
    "SHALL not exceed 0.10mm between any two colors"
    0.10mm = 0.004"
    I think previous edition varied tolerance based on sheet size and caliper weight?
    Steve Suffoletto - Buffalo/Rochester, NY
    Last edited by SteveSuffRIT; 01-25-2019, 09:36 AM.

    Leave a comment:


  • Evaldas Gu
    replied
    Originally posted by Alois Senefelder View Post
    Hello Evaldas,


    Why as this image got to be printed "Rich Black" ??


    Regards, Alois
    Actually it was printed due to an error in automated process or to perhaps it's correct to say that this situation was not foreseen, and we've got a claim from our client, the fact is that the file from him was not correct when received (cmyk x100), and here comes the question of who's responsible for it. It is mentioned in recomendations that max TAC is 280%, but i would like to have more arguments on this.

    Leave a comment:


  • Alois Senefelder
    replied
    Hello Evaldas,


    Why as this image got to be printed "Rich Black" ??


    Regards, Alois

    Leave a comment:


  • Evaldas Gu
    replied
    Originally posted by gordo View Post

    Define “small “.
    0,3-10mm it's an illustration with lines and bigger objects...

    Leave a comment:


  • gordo
    replied
    Originally posted by Evaldas Gu View Post

    In this particular case there was vector picture with small elements.
    Define “small “.

    Leave a comment:


  • Evaldas Gu
    replied
    Originally posted by Alois Senefelder View Post
    Hello Evaldas,


    Question, What exactly are you reproducing in "Rich Black" ...... Text, H/tones or Solids ??


    Regards, Alois
    In this particular case there was vector picture with small elements.

    Leave a comment:


  • Alois Senefelder
    replied
    Hello Evaldas,


    Question, What exactly are you reproducing in "Rich Black" ...... Text, H/tones or Solids ??


    Regards, Alois

    Leave a comment:


  • gordo
    replied
    Originally posted by Evaldas Gu View Post
    And does anyone know about rich black standad? Is ir standartized under ISO or so? We usually print in CMY x60 + 100 black.
    AFAIK, no, there is no ISO standard for rich black because it is usually a shop specific choice. The rich black recipe is usually chosen by testing or by tradition.

    Usually you want to maintain neutrality or a slight bias to Cyan. Your recipe may not produce a neutral rich black.
    So what you'll often see is 100K 75C 60M 60Y or 100K 50C 40M 40Y
    Some shops just use 100K 60C

    Leave a comment:


  • Evaldas Gu
    replied
    And does anyone know about rich black standad? Is ir standartized under ISO or so? We usually print in CMY x60 + 100 black.

    Leave a comment:


  • gordo
    replied
    Originally posted by Evaldas Gu View Post

    Not sure if understood the question correctly, but the grain direction is aligned with print direction. About shrinkage. It seems that on the press the bottom of the page is shrinked horizontally during the print, compared cropmarks on the top are aligned perfectly and the bottom ones are off about 0,05 mm.
    Unlike web presses, on sheetfed presses paper grain can be in the same direction as the paper's path through the press. Or, it can be across the sheet. Often it's the bindery/finishing that determines which way to run. That being said, with changes in moisture content, paper expands or contracts more in the cross direction than in the grain direction and that affects registration. The best relative humidity to maintain the paper's dimensional stability is 35%-50%. Ideally the moisture content of the paper in multi-color printing should be slightly above than its equilibrium value with the relative humidity of the pressroom.

    Leave a comment:


  • Alois Senefelder
    replied
    Hello Evaldas,


    YOU are running- -

    the Paper Grain in the wrong direction........ IT should run across the "Width of the Press"

    NOT around the "Circumference" of the Cyiinders


    With not running the correct direction ......... the Paper is Fanning Out at the leave edge.


    Regards, Alois
    Last edited by Alois Senefelder; 01-23-2019, 03:07 PM. Reason: **************

    Leave a comment:


  • Evaldas Gu
    replied
    Originally posted by gordo View Post

    AFAIK the tolerance for mis registration is zero. Historically, the informal tolerance was half a row of dots at 175 lpi. But that's not a specification or standard.
    Could you elaborate on the sheet shrinkage between units (Back sheet flare (a.k.a. flare-out or coning), back sheet stretch, waggle, fit?)
    What grain direction is your paper?
    Not sure if understood the question correctly, but the grain direction is aligned with print direction. About shrinkage. It seems that on the press the bottom of the page is shrinked horizontally during the print, compared cropmarks on the top are aligned perfectly and the bottom ones are off about 0,05 mm.
    Last edited by Evaldas Gu; 01-23-2019, 02:13 PM.

    Leave a comment:


  • gordo
    replied
    Originally posted by Evaldas Gu View Post
    Hi all,
    We're printing with Heidelberg Offset machines and lately have some color misregistration problems, so i was wondering is there a tolerance according ISO 12647 standard? Also to this misregistration problem adds a substrate shrinkage between print sections.
    The other problem is we have an automated workflow and one of printed designs slipped with CMYK x 100 color in the small objects, so now we've got a customer complaint with misregistered (ghosted) objects in the print. So now we're looking for an answer to our customer and I think there should be mentioned some tolerances in this ISO standard. This file was not trapped.

    Could please anyone help on this? Didn't find anything on the web...
    AFAIK the tolerance for mis registration is zero. Historically, the informal tolerance was half a row of dots at 175 lpi. But that's not a specification or standard.
    Could you elaborate on the sheet shrinkage between units (Back sheet flare (a.k.a. flare-out or coning), back sheet stretch, waggle, fit?)
    What grain direction is your paper?

    Leave a comment:


  • Color registration and rich black standard's ISO 12647-2

    Hi all,
    We're printing with Heidelberg Offset machines and lately have some color misregistration problems, so i was wondering is there a tolerance according ISO 12647 standard? Also to this misregistration problem adds a substrate shrinkage between print sections.
    The other problem is we have an automated workflow and one of printed designs slipped with CMYK x 100 color in the small objects, so now we've got a customer complaint with misregistered (ghosted) objects in the print. So now we're looking for an answer to our customer and I think there should be mentioned some tolerances in this ISO standard. This file was not trapped.

    Could please anyone help on this? Didn't find anything on the web...
CanonKBAAvantiSmartsoft (Presswise)DuploEnfocusXerox4Over

Canon Embellishment White Paper

Collapse

Print Embellishment Goes
Straight To The Bottom Line

InfoTrends reported that interviews with more than 100 print customers demonstrated an appetite and willingness to pay premiums of 24% to 89% for special effects, over CMYK-only printing. They also indicated embellishment could apply to a significant portion of their work. Embellishment options can include hot foil stamping, spot gloss UV, embossing, debossing, letterpress, diecut shapes, lamination, duplex, triplex, gold foil, silver foil, copper foil, white foil, black foil, clear foil, etching, and laser cutting techniques. Download The Free White Paper.

CanonSmartsoft (Presswise)AvantiKBAAvantiEnfocusGraph ExpoDuploXeroxChili publish4Over

What's Going On

Collapse

There are currently 4165 users online. 52 members and 4113 guests.

Most users ever online was 10,745 at 04:03 PM on 10-10-2019.

Working...
X