View Single Post
  #9  
Old August 15th 07, 09:29 PM posted to rec.photo.digital
frederick
external usenet poster
 
Posts: 1,525
Default UV harms Pigment Inkjet prints

Bill Tuthill wrote:
frederick wrote:
http://www.goldenpaints.com/justpaint/jp14article2.php

Printer and inkset not specified. Canon and HP also make pigment
inksets for photo printers. Third party ink makers also supply some
pigment inks.


True, but in fall of 2006, did Canon or HP make "professional giclee"
pigment ink printers? Maybe yes, maybe no.

Only just.

Dye based inks on matte paper are a very bad idea for longevity.
UV is the least of problems to be expected.


According to Wilhelm, Epson dye-based inks on Glossy Photo paper fade
noticeably in 4 years, versus ~ 12 years for Heavyweight Matte paper.
That is a factor of 3, more than the difference between pigment and
dye based inks in the aforementioned study.


Epson R1400 (dye) inks DPR (framed under glass):
Ultra Premium Photo Paper Gloss - 98 years
Heavyweight Matte - 98 years

Heavyweight Matte (Premium Presentation Paper Matte)isn't a typical
matte paper.
It appears to have a coating in/on it to protect dye inks.
More typical performance of dye on matte papers may be from tests of dye
inksets on Epson Archival Matte (AKA Enhanced Matte / *Ultra* Premium
Presentation Matte) or art papers - it will be lousy.
Although Matte Heavyweight is usually included in paper selection
drivers for Epson pigment ink printers, it doesn't work very well.
Pigment inksets on the "Enhanced Matte" paper typically have a display
permanence rating 100 years. That doesn't take into account the rapid
"yellowing" effect of OB depletion in that paper. Nice paper, but shame
it doesn't stay bright white for long.