QTR-Quadtone RIP

This method may work if the best black ink density for the new paper 
matches that of the paper whose existing profile you use.

However a better way to optimise dmax and take out some of the guesswork 
is to standardise on one paper setting & resolution and print one of the 
ink separation tifs in calibration mode. See the file 'QuadToneRIP User 
Guide.pdf' in the qtr folder for more details.

Howard


dmwket wrote:
> Alan,
> Linearization is done on a per paper basis.
> 
> It is the profile used by QTR for that paper.
> 
> Based on experimentation and reading here on this forum I arrived at the following 
> process;
> 
> 1) Select an existing profile text file that approximates the paper you want to profile and 
> delete the Linearization line at the end of the file and save with a unique name.
> 
> 2) find the best Dmax by printing 100% black squares with several paper settings i.e. 
> Premium Gloss Photo Paper, Premium Luster Photo Paper, etc. at 1440 as well as 2880 
> using the file you created in 1 for the curve.
> 
> I positioned the ink swatch on the paper by clicking center image off and then setting a 
> margin to create a row of swatches at the various setting.
> 
> These samples are all printed with No Color Management set in the printer dialog.
> 
> This is tedious but important. I let the samples dry for about 2 hours before reading them 
> with my Spyder Spectrometer.
> 
> 3) Once the best Dmax paper, resolution setting is found. use that paper and resolution to 
> print the 21 X 4 step wedge using the curve created in 1.
> 
> 4) Let the test print dry for a minimum 2 hours, over night is optimum, then read it and do 
> the linearization.
> 
> 5) Copy the Linearization line from the text file and paste it into the file you made in 1 
> above and save the file as your curve file for the paper.
> 
> 6) Copy the file into the printer profiles folder and "install the printer".
> 
> 7) Once the curve is installed I save a preset for QTR that has the paper selection, 
> resolution setting and curve. I name the preset to reflect what paper it is to simplify my 
> printing.
> 
> 
> Trust this helps.
> 
> There may be a better way to do this that someone more experienced can offer.
> 
> Have fun learning QTR --- the B&W prints it produces are great.
> 
> Regards,
> David
> 
> --- In QuadtoneRIP@yahoogroups.com, "handyman856" <avr@...> wrote:
>>
>> Is linearization done on a 'per printer' basis, done once with any
>> paper for a given printer, or is done 'per paper', and part of the
>> profiling process of each paper?
>> 
>> =Alan R.
>>
> 
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>  
> Yahoo! Groups Links
> 
> 
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>