Re: Profiling the Roland 8 Color Machine
Re: Profiling the Roland 8 Color Machine
- Subject: Re: Profiling the Roland 8 Color Machine
- From: Joel <email@hidden>
- Date: Tue, 9 Jan 2001 12:42:23 -0600
Chris Murphy wrote:
Depends on how the device is being driven. If it's being driven by a
QuickDraw (or GDI) driver, then profile it RGB.
I haven't heard of rgb software which drives the FJ500. If it's out
there, I'd be very interested to know.
If it's being driven by a RIP, then you need to ask the RIP manufacturer
about how their RIP prepares the files. There aren't that many that will
accept an eight channel separation. Most accept a four channel separation
and during RIP they generate (as a part of the screening process)
additional channels. So in this case you make a CMYK profile.
Neither Roland's ColorChoice, nor Scanvec-Amiable's PhotoPrint offer
any information as to how the extra ink parameters are handled by the
RIP. If it's out there, I'd be more than interested to know. I assume
because the cal package offers multi-ink control, the OrGr/LcLm tags
are recognized by the RIP software under their respective profile
categories, and both RIPs offer multi-channel print separations, that
there must be multi-channel algorithms at work. However, generated
ICC profiles still indentify themselves as cmyk to all other apps
(ex:Profile Manager)
>How does one even make a file for that?
If the RIP actually supports more than four channel data and retain
integrity (that is, if you ask it to print 100% orange, that it actually
uses ONLY orange ink and doesn't reseparate internally and use other ink
colors in addition to orange ink) then you do this in one of two ways:
1.) RIP supports an 8-channel ICC profile. So you print RGB data to the
RIP and it uses the ICC profile to separate the data into 8-channels and
sends it onto the printer. That's the easiest way.
And substantially more accurate, especially when utilizing a
Hexachrome workflow.
2.) Need to find software or a Photoshop plug-in that will use an
8-channel ICC profile to product an 8-channel separation, then save the
resulting 8-channel file as DCS 2.0; place in a QuarkXPress file and
print.
For images, in particular TIFF's, there is Pantone's HexImage. For
vector work: Pantone's HexVector. The HexVector works fair to well.
HexImage? We bumped it for an RGB workflow long ago because
individual channel editing without being able to softproof composites
onscreen was incredibly time consuming by comparison.
--
joel johnstone
designtype
Winnipeg Manitoba Canada
email: work: email@hidden
color geek in residence, reality notwithstanding