postershop and profiles
postershop and profiles
- Subject: postershop and profiles
- From: "Peter Merck" <email@hidden>
- Date: Sat, 9 Feb 2002 11:24:41 -0500
Dear colorsyncers
I just wanted to pass on some observations on using postershop and profiles.
Postershop will recognize an embedded profile only if it is in tiff format,
either CMYK or RGB. If you sent over a PS RGB tiff postershop's pull down for
input rgb will list 'use embedded profile', same thing for CMYK. Send over an
EPS format and postershop will not list this option.
Postershop needs an input profile and an output (printer profile) in oder to
work properly. If you do no know the color space or profile used on you file
the color is screwed up for that print as you have to use one of the dozen
they made or your own for input CMYK or RGB.
So I send an untagged file to poster shop, which has to convert it to an input
profile and then reconvert this into a printer profile of which you do get to
choose rendering intents. If you select 'no profile' on the input side you do
not get a conversion to the printer profile, it will only use its
linearization and ink limits. And my Arizona 500 inks are so off from swop,
profiles are badly needed.
I get mostly Illusrator files from clients and we save the files as eps and
copy over to postershop's input folder. Yesterday's file is good example. I
open a Ill 9 file and it warns me RGB file doesn't have a profile so I leave
it 'not color manage' for now. But the image file is a PS cmyk tiff of
unknown color space (I'll assume swop 20% default). Ill 9 AFAIK does not
convert the 4c file into RGB to match the original file space setup.
Assign A'98 space to the file and save as eps. Send over to postershop. Now
the fun begins. The 4c image portion will only change if I change the cmyk
raster input profile, since I don't know what this is I have to guess. The RGB
elements (one vector, one image for this file) will only change with changing
the RGB input profiles (postershop stars with defualts, so you have to change
the pulldown and select A'98). There's raster and vector choses for cmyk and
rgb for a total of 4 different input profiles possible for one file and
rendering intent chioces for raster and vector.
So I made a profile from PS6 for swop 20% to use as input but havn't tried it
yet.
Any comments and questions are welcome. I'll try to post some of this on the
Postershop web site user group also.
Pete Merck
email@hidden
_______________________________________________
colorsync-users mailing list | email@hidden
Help/Unsubscribe/Archives:
http://www.lists.apple.com/mailman/listinfo/colorsync-users
Do not post admin requests to the list. They will be ignored.