2 Subjects - Cook Book & Profiles For Flexo
2 Subjects - Cook Book & Profiles For Flexo
- Subject: 2 Subjects - Cook Book & Profiles For Flexo
- From: "email@hidden" <email@hidden>
- Date: Thu, 21 Feb 2002 08:44:27 -0500
Hi Bill,
What is needed to make ICC profile for flexo (high dot gain), is to have a
target that is pre-compensated to avoid plugged shadows, etc.
This pre-compensation (gain curve) can be re applied after the readings to
then, compute the ICC profile.
I made a lot of flexo ICC profile in different markets (corrugated, film,
folding carton) and this technique worked very well.
We use, train, and distribute ColorBlind Pro in Canada. CB Pro will give you
all the tools and features you need to create very good ICC profile.
Hope This help!
Louis Dery
TGLC inc.
www.tglc.com
Subject 2 Profiles and press gain - please correct where / when needed.
- I am a flexo printer and have to deal will gains that are different
that offset. I know profiling software "knows not CMYK, only LAB. But
since it reads CMYK tint patches to get LAB values and then a proofing
device then turns those values back to CMYK tints, I will need to talk
about CMYK tint patches to get my thoughts across. Presently we are not
using ICC profiles, (I am in the process of buying a profiling package),
but we do have a compensation curve in our workflow so tints and CMYK
images on film are "pulled back" for our press gain. This compensation
allows us to mimic the 20% midtone gain of an offset press with special
considerations made for the highlight and shadows areas. If I print the
target from a profiling software package my 50% magenta area (watch out,
here comes the dots) will gain to, lets say for this discussion, 90%.
Also for this example lets say that my present compensation curve "pulls
back" all 50% areas to 30%. We know that through testing a 30% tint on
film and plates prints on our presses prints 70%. We now have a 50%
"pulled back" to a 30%; a 30% printing a 70% which give us the 20%
midtone gain we want on press for a 50% area. It seems to me that if I do
not adjust the profile target for my press gain I will have areas that I
want to print 70% actually printing 90% (since 50% prints 90%), the
profile will take the LAB value for the 90% and replace all 50% areas
with that value which would make a proof using that profile look much
darker that I want it to be. If I linearize the press target will the
profile software now "pull back" the 90% area to 50% and then assign LAB
values to that 50% area in which case the proof would look too light
because I actually want 70% values in the 50% area? With my present
education on profiling I would opt to "pull back" the profile target,
print it, make a profile and use that profile for my CMYK proof printing
workflow - right / wrong?
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