Re: CMYK is CMYK is CMYK
Re: CMYK is CMYK is CMYK
- Subject: Re: CMYK is CMYK is CMYK
- From: Bill Whitfield <email@hidden>
- Date: Wed, 2 Apr 2008 13:01:02 -0700
Greetings All,
I would as your narrow web printer to supply you with:
1 - Printed solid patches of the CMYK inks they are using. If they
are controlling their presses this would be no problem for them.
2 - Ask them what TVI they are printing at the 50%. Remember that a
50% on most flexo presses, using film to make their plate, will print
at 80 or more percent. They need to have a workflow that compensates
for this. Digital plates also need a compensation, just different.
With these tools you can figure out how close they will print to
SWOP. Since flexo has no standards for ink you may find that their
solids may be close to SWOP. If your flexo printer works with a good
ink company they can help them create an ink set that, taking the
paper into account, will allow them to print close to SWOP if TVI and
the other variables (many) are kept in check.
G7 and FLEXO:
In the flexo world there are challenges to using G7 methodology and
the ink set specified by GracolSpec2007. The most daunting one in my
opinion is the paper - we have sooooo many to chose from. I have
chosen to use the most popular semi gloss as a starting point and my
dE's to the Gracol Spec are:
C - 1.75
M - 0.71
Y - 1.43
K - 1.72
Since we have 6 plants across the nation, I have been "lucky" (some
might call this a sick definition of lucky) enough to have started G7
methodology over 3 plants; 10 presses (3 different manufacturers); 4
ink companies (2 UV and 2 water based); 3 different plates; 2
different stocks; a variety of press tooling and press operators with
skill levels. WIth some highlight challenges because of the two
different stocks (one on the yellow side and one on the blue side) I
have been quite pleased with the results.
I believe V4 of FIRST will include LAB values that will be based on
Gracol2006. V4 is due to be out at this years FTA Forum in April. As
Flexo printers we are often asked to match the graphics on the
product label to the graphics on the box that holds the product. I
think with some limitations, following the G7 methodology and the
Gracol spec for color will help us tremendous in these matching efforts.
-Bill-
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