Re: Embed causes rich black – a mystery in several acts
Re: Embed causes rich black – a mystery in several acts
- Subject: Re: Embed causes rich black – a mystery in several acts
- From: Matthew Kelly <email@hidden>
- Date: Fri, 14 Aug 2009 14:39:51 -0500
On Aug 14, 2009, at 1:30 PM, Marco Ugolini wrote:
Matthew Kelly wrote:
What happens here is no different than when you convert a grayscale
image in Photoshop to CMYK. It will create four channels of color to
create the black, unless you use a profile conversion for maximum
black. In your file everything gets tagged with the profile,
including the type. When it goes to the output devise, the RIP will
convert everything to the tagged profile, thus the four channels of
color.
"Convert everything to the tagged profile"? The file *already* lives
in that profile. Why convert it to the color profile that it already
lives in? In a "null" conversion nothing changes. Unless your
equipment and software are built with peculiar notions of what
constitutes a conversion.
Marco Ugolini
I think you misunderstood, this is not what we do, but I was trying to
explain why his type went from 100% black to four color black. The
PDF that he created out of InDesign included an output profile. The
RIP for the platesetter converted the composite PDF to that CMYK
profile. The 100% black got converted to a four color black. You can
do the same thing in Acrobat if you do a profile conversion of the
entire document and do not select "Preserve Black".
Here we do our conversion prior to sending them to the RIP, and also
have our RIP configured to ignore ICC profiles.
Matthew Kelly
Prepress Supervisor
Litho Press, Inc.
4334 Milling Road
San Antonio, TX 78219
210-333-1711
email@hidden
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Colorsync-users mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden