QTR-Quadtone RIP

Making negatives is like making a custom coating for your platinum palladium
mix; it's yours. It is really quite easy. I use a "pyro' look to my negs.
The negs work great for graded paper too as well as MG papers if you want to
use them to make SG prints.  It's not rocket science but it help to know
what your doing. It makes your guesses have some value. ; )   
 
 
Eric Neilsen
Eric Neilsen Photography
4101 Commerce Street, Suite 9
Dallas, TX 75226
 
www.ericneilsenphotography.com
skype me with ejprinter
Let's Talk Photography
 
  _____  

From: QuadtoneRIP@yahoogroups.com [mailto:QuadtoneRIP@yahoogroups.com] On
Behalf Of 228044881 228044881
Sent: Monday, December 26, 2011 6:16 PM
To: QuadtoneRIP@yahoogroups.com
Subject: Re: [QuadtoneRIP] PDN system and QTR
 
  
It is possible to produce a QTR curve that lays down ink in a linear
fashion, then you can use pdn or something similar to produce a grey curve
to apply in QTR. I use 50% photo black, 26% Yellow and 25% Cyan for a total
ink limit of 101%. The step wedge may print with pizza wheel marks or
banding because printers dont like to lay ink down that way, but once you
have applied a grey curve the ugliness goes away. You apply the same curve
to all the colours used to maintain the 50,26,25 ink ratio. If you want less
density you can cut the PK % down and increase the others, say 33% each, if
you need less again cut the total ink limit and proportional limits. Vivid
magenta prints with less grain than cyan, in the above recipe but produces
less density. Do a manual head align before you start.

David

________________________________
From: Alan Vlach <alanvlach@... <mailto:alanvlach%40gmail.com> >
To: QuadtoneRIP@yahoogroups.com <mailto:QuadtoneRIP%40yahoogroups.com>  
Sent: Tuesday, 27 December 2011 11:21 AM
Subject: Re: [QuadtoneRIP] PDN system and QTR

Check out Ron Reeder's site. He has a procedure for making negatives with
QTR. I use QTR and Mark Nelson's Curve Calculator software to execute the
steps and calculate the curves. PDN itself is based on the use of color (and
no black inks) to create smooth tonalities in the digital negative. I have
used it extensively and it is an excellent method to make negatives, but is
patented ( you can't teach it without permission which he only gives to
university professors or use it for profit without paying a commission) ,
and, since I teach workshops in making negatives I have switched to using
QTR. Ron Reeder's method mixes all the inks when making a negative and I
feel the results are as good as PDN. The only downside is that PDN is very
stepwise and straightforward during the calibration process whereas there is
a lot of testing and guesswork to determine the right ink mix using QTR when
mixing all the inks. 

Hope this helps

Alan

On Dec 26, 2011, at 3:22 PM, mysteriousmirage wrote:

> Hello,
> 
> Has anyone had expereince using the Mark Nelson Precision Digital Negative
system with QTR? If so, what has been your expereince? 
> 
> Thanks,
> 
> -Ted
> 
> 

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