QTR-Quadtone RIP

Harry, You are trying adjust your flow by making a massive curve adjustment
in PS.; an almost totally white screen. So any problem downstream with ink
limits is going to be extreme. Ernst has not told you anything different
than I. You need to get your flow under control; ink limit. I presumed that
you had control over your suspension which doesn't sound like you do. If you
are getting clogging, either your material has not, or can not be ground
small enough to be used by your printer or you are getting a reaction
occurring to your material before it makes it out the head. If you go to the
calibration step in QTR, you can limit your ink, limit your gain. If you
don't gain control over your printers out put you will have a very tough
time creating and using a curve in PS that will print accurately enough to
avoid your dot gain. 

 

Unless you have a very well calibrated monitor, using that approach is also
very hard. Screens at both extremes can and will suffer as will your eyes
ability to see it.  

 

Eric Neilsen Photography

4101 Commerce Street

Suite 9

Dallas, TX 75226

http://e.neilsen.home.att.net

http://ericneilsenphotography.com

Skype ejprinter

  _____  

From: QuadtoneRIP@yahoogroups.com [mailto:QuadtoneRIP@yahoogroups.com] On
Behalf Of Ernst Dinkla
Sent: Thursday, March 27, 2008 4:55 AM
To: QuadtoneRIP@yahoogroups.com
Subject: Re: [QuadtoneRIP] Re: QTR Help for photoceramic curve?

 


The density of the ink can really not be controlled by 
reducing the ceramic particles (fritte as we call it here I 
guess) amount to the ink medium ? Is the rheology of the 
ink already at the edge of not usable ? If dotgain in the 
total process is hard to handle then a duotone, tritone or 
quad inkset should make it easier to keep the tonal range in 
control but only when the ink itself isn't more compromised 
by the changed pigment ratio. No ink additives possible to 
deal with that issue ?

Do you measure the densities in the final product, a 
greyscale step target on a baked tile ? Measuring on the 
printed transfer sheet is likely not delivering an accurate 
base to make curves on.

-- 
Met vriendelijke groeten, Ernst

| Dinkla Grafische Techniek |
| www.pigment-print.com |
| ( unvollendet ) |

 



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