QTR-Quadtone RIP

Harry Burnett Jr wrote:
> Dear Ernst
> Thank you for your reply.  So far your understanding of my photoceramic quest gets closer to the problem. I compare the final fired result with a good glossy paper print and make my judgments here.  I only wish I could better compound an my digital fluid with dependable results.  I have no lab rheologology
> measuring equipment and only use trial and error to get where I am with this project. Ink additives seem almost infinite but when I get a good fritted image the digital fluids are very viscous and clog the printer nozzles.  Your suggestion on using duotones, tritones and quadtones seems a very good path to follow as I have no one who will mentor me in the QTR curve creation procedure as yet. Photoshop manuals have duotones, tritones and quadtone procedures well documented.  I note you are in the Netherlands-Holland here in the USA.  Thank you for your interest and replying with the suggestion of persuing Duotone, tritone, and quadtone printing.---- Original Message ----- 

I probably wasn't clear on the duotones etc. What I 
suggested is to make an inkset that partitions the inks in 
two, three or four gray inks and use QTR to create the 
curves and drive the printer. Not by diluting the black ink 
but by reducing the black pigment you add to the ink medium. 
If that still changes the rheology and you have no 
additives to compensate that then you could even add 
transparent fritte (if that exists) to get the right 
consistency.

There are commercial ceramic inks these days for pi\ufffdzo heads 
(the Spectra type) that can print directly on tiles but 
that's not what you are looking for I guess.

-- 
Met vriendelijke groeten, Ernst


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