Digital BW, The Print

"John" <jrnolly@...> wrote:
>
> Paul:
> Yes, interesting results regarding the polyurethane--was that the solvent based, or water based product?

It was the water based, aliphatic I was experimenting with.

> Of course we all know that urethane does allow moisture migration.

As I noted earlier, I looked for epoxy, but found none that did not yellow.  The one-solution water based poly urethane looked like the toughest that would work for us.  However, the clear coatings industry is huge, and a lot of R&D goes into it.


> And, regarding humidity, That seemed to be a major factor when considering dyes with their complex inter-reactions--much more so than pigments.  

Yes, they are water soluble, after all.  Actually, it might be interesting to see if once dried I can re-dissolve the Noritsu-Epson product. (Dare I say "bulk Claria"?  I suspect Epson would object to that.  See the black Lab A & B comparison at
http://www.paulroark.com/BW-Info/Noritsu-Claria-BO-Lab.jpg)

For most of the cards and other output I have in mind for the Noritsu inks, I'm not that concerned with longevity.  I expect it to be good enough. However, for someone who wants to have only a single printer set up for B&W with the dyes, some of these sprays or coatings for those images that are intended for long term display are archiving might be important.  So, I'm going to explore them more.

 
> An ideal inkjet receptor would be one of the swellable polymer base, that swells on initial contact with water, and then remains water impervious after that, providing protection against airborne contaminants.

If they work, are available, and otherwise good looking papers, there might be a market for such.  I didn't like the few I looked at when they were first introduced, but then I was not into dyes at the time.  I must say I'm having lots of fun with the Red River Metallic at the moment.

Paul
www.PaulRoark.com