Yahoo Groups archive

QTR-Quadtone RIP

Index last updated: 2026-04-28 23:12 UTC

Message

Re: [QuadtoneRIP] Why can't I get a linear curve?

2011-03-15 by Mike Finley

Not sure how far you've gone but just to be sure, have you added the 
Linearize data generated to the qidf file and regenerated the quad file? 
(Not using a Mac, I don't know how you do this on that platform)

On 15/03/2011 18:04, dkosiur wrote:
> I've been trying to create a set of curves for a new paper on my Epson
> 3880, but the initial curve never becomes a straight line after
> linearization. Isn't it supposed to become a straight line?
>
> I read all the docs and did the following: printed the ink separation
> chart and calculated my ink limits for K, LK, and LLK inks. (The numbers
> were K: 55%, LK: 46%, LLK: 14%.) After inserting those numbers into my
> new curve file and installing the file, I printed the
> Step-21x4-random.tif file and used my Datacolor 1005 spectrophotometer
> and Spyder3Print software on a Mac to read the swatches. After running
> the resulting file through QTR-Linearize-Data, the result came out as a
> curve.
>
> ...
>
> LINEARIZE="96.085 93.5125 91.435 89.3875 86.9875 84.455 81.6075 77.57
> 74.915 71.8225 68.355 64.405 60.4925 56.3575 52.4375 47.6275 43.1525
> 35.9175 27.3475 16.14 6.5975"
>
> Is this the way it should be? Did I do something wrong? Am I
> mis-interrpeting the word "linearize" here?
>
> Any help/explanation would be greatly appreciated.
>
> Many thanks,
> Dave
>
>

-- 
mike finley photography
fine art photography and website construction
http://mypicks.efikim.co.uk
http://www.mikefinley.co.uk
http://www.roguegenecollective.com/Mike_Finley.html
http://www.efikim.co.uk

Attachments

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.