Digital BW, The Print

Op 28-11-2010 16:57, Paul schreef:
> Ernst Dinkla<edinkla@...>  wrote:
>>
>> ...when dye inks have to be used on matte papers
>> it may be a good thing to explore the uncoated cotton
>> papers again. With the Iris dye inks that
>> proved to be more fade resistant than using the then
>> new inkjet coated matte art papers.
>
> Was there ever a good explanation of why that was the case?

Possibly PH grades differed, buffered + coated papers not really 
suitable for the dyes used, the dye never reached the cellulose. The 
best place to find explanations for that result must be available in 
fabric printing. The Ciba Specialty  Chemicals division for example. 
Reactive dyes. Though part of that industry switched to pigments too 
because they could be used more universal on all fabrics.
Wilhelm's testing at that time didn't have ozone tests. Nevertheless gas 
fading was a known phenomenon in the textile industry. The washing 
machine and curtains hanging in sunlight are an environment some grades 
more aggressive than prints indoors framed behind glass.

http://www.pburch.net/dyeing/fiberreactive.shtml

John Nollendorffs might know of what is left of third party gelatine 
papers. His Lincoln inks were Ilford Archiva dye inks 
(Iris>ColorSpan>Encad) customised for the Epson 9000. Ilford always had 
a good link to Ciba of course. Olmec and Ilford had/have gelatine papers 
but not in matte versions I think.


-- 
Met vriendelijke groeten,   Ernst

Try: http://tech.groups.yahoo.com/group/Wide_Inkjet_Printers/

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