Arthur said:
Hi Colin,
I ask because the ink set and paper matter.
For instance, most of Kodak's consumer grade papers were using a
swellable polymer surfaced paper. This paper is not recommended for
pigment inks such as the K3 series. Those Kodak papers are designed
for dye inks. The swellable polymer surface are helpful in reducing
the fugitive nature of dye inks by making them less likely to fade by
locking the dye into the surface structure of the paper. Pigment inks
do not integrate well with swellable Polymer papers, and
swellable polymer papers also are never waterproof. They are
vulnerable to humidity, spills, fingerprints and other environmental
considerations. Basically, they do not dry properly with Ultrachrome
inks, which in themselves are very slow drying due ot the glycol
levels. Further the nature of swellable polymers is that even when
dry they are relatively soft.
However, it would appear the Kodak papers you are using use differing
technology, as they are rapid dry, so likely they are microporous.
In general, microporous inks are more appropriate for pigment inks.
These are "instant dry" types. They have a porous ceramic surface
under which is another clay (kaolin) surface which locks the ink into
place and reduces dot gain. These papers can literally be rinsed one
truly dry and the inks remain set. Even dye inks which are water
soluble will remain set. The surface is harder, and remains dry
after printing, and although dye inks may fade more quickly with it,
pigment inks are not at great risk to fading.
It is true that pigment inks tend to set closer to the surface, and
therefore can be more vulnerable to scuffing and such. Some people
use overcoats to help keep the ink more protected. Do you find that
most papers you have used have equal vulnerability to scuffs and
scrapes?
I admit, I still like what silver photographs look like and how well
they tend to behave, especially with B&W images. But I suspect some
paper and ink combos hold up better than others.
Art
C J Southern wrote:
--
<<::SNIP::>>
Thanks for the information, Art. I wasn't aware of the nature of Kodak paper
and tried using some I had gotten on sale with Epson DuraBrite inks, with
terrible results. They came out looking like a craquelure effect had been
applied to the image, especially in the black and darker areas of the print.
After experimenting with plain 94 bright 24 lb. bond and finding that this
did not occur, I went out and got Epson's DuraBrite Glossy paper and got
great prints. Although I was happy to have solved the problem, I was curious
as to why two apparently similar "glossy" papers had such drastically
different responses to the ink. Now I know. Thanks again.
BTW, is there somewhere on the Web I can go to find information about inks
and proprietary papers such as you have included here, or is this a summary
of information that you have picked up here and there over time? I have
Googled "paper and ink characteristics," "inkjet paper characteristics," and
others, and have found some not too bad general information, but little
manufacturer-specific information such as given above other than sales
fluff.
Cheers,
Scott