Digital BW, The Print

With MIS K4, I like RR Polar Satin. A bit warmer than ultrapro. 

RR publishes the results of their own fade tests in this page:

http://www.redrivercatalog.com/infocenter/printlife_nav.htm

They report 35 yrs. for polar and 47 years for ultrapro.




--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Steven
Karafyllakis" <stevekphoto@...> wrote:
>
> I put 4 grayscales out in my south window on 7/17. They are receiving 
> 10-12 hrs of ambient light a day, with 3-4 hrs in the afternoon being 
> direct (but not over-head) sunlight. The window is 1/4 inch standard 
> glass.
> 
> Two scales are coated with PremierArt, two are not. Of each pair one 
> is MIS K4 printed in my R1800, the other Epson K3/SP3800. Each scale 
> has a black mattboard strip covering the middle 1/2-inch.  Readings 
> taken with a Colorvision spectrophotometer.
> 
> MIS coated: Start, 2.4   @ 3 months, 2.35    Epson coated:  Start, 
> 2.59  @ 3 months, 2.53
> 
> MIS uncoated: Start,  2.31  @ 3 months  2.25  Epson Uncoated: start, 
> 2.48  @ 3 months 2.41
> 
> Lifting the strip of black cardboard, I can't yet see a divider line 
> between the covered and uncovered parts on any of the scales.
> 
> 
> The 'b' value of the base started at -3.4, initially went a bit bluer 
> (OBAs burning off?) now is drifting back towards yellow a bit, but 
> none of the blueness shifts are visible. This continues to be a 
> warmer than average base color for an RC paper, but with  no rapid 
> yellowing visible, unlike SOME of the RC papers I've tested.
> 
> I like this paper, it prints with good presence and tonal separation, 
> and the warmer base makes it easier to mat.
> 
> 
> Steven Karafyllakis
>