Yahoo Groups archive

Datacolor User to User Support Group.

Index last updated: 2026-04-28 23:18 UTC

Thread

Building QTR curve with PFP?

Building QTR curve with PFP?

2007-05-16 by Michele Berti

Is it posible? How? I'd like to build QTR curve for Epson inks and
Hahnemuhle Fine Art Pearl paper to be used on the R3800. I've already
build some color profiles using the extended greys patches as well but
prints look sliglty on the warm side. I'd like to get them as neutral
as possible.

Re: [colorvision_group] Building QTR curve with PFP?

2007-05-16 by CDTobie@aol.com


In a message dated 5/16/07 10:29:27 AM, michele@... writes:


Is it posible? How? I'd like to build QTR curve for Epson inks and
Hahnemuhle Fine Art Pearl paper to be used on the R3800. I've already
build some color profiles using the extended greys patches as well but
prints look sliglty on the warm side. I'd like to get them as neutral
as possible.

Take a few measurements from your prints in Measure mode. If the a*/b* values in a wide range of midtones (because highlights are papertone influenced, and shadows are blackink tone influenced) are less than one, your print is neutral, and your eye is not. That doesn't mean you can't adjust it to suit you, just that the problem is less likely to be neutrality than personal preference, inktone/mediatone relationships, or viewing lighting.


Then, if you still want to play with QTR, you can use the PFP spectro for taking measurements for your work there, but it will have the same measurement characteristics then as before; so if you don't agree with its definition of neutral now, there's no reason you'll like it any better later.

C. David Tobie
Product Technology Manager
ColorVision Business Unit
Datacolor Inc.
CDTobie@...
www.colorvision.com




**************************************
See what's free at http://www.aol.com.

Move to quarantaine

This moves the raw source file on disk only. The archive index is not changed automatically, so you still need to run a manual refresh afterward.