Antonis, informs me that a stop is .3 density points, so the change we saw in the window for 6 weeks was no where near a stop decline. Sounds like the Huntington needs to change their light bulbs...because they are worse than my hot, full sun window. Robert On 9/12/01 3:35 PM, "Robert Morrison" <rmorrison@...> wrote: > In our coatings study, the dmax of uncoated 100% Piezo Black printed on > Orwell dropped from 1.69 to 1.53 in 6 weeks of full LA sun. I don't know > how to convert this to stops...maybe Antonis could help with this one. > Regardless these were really harsh conditions. I doubt a silver print would > have done as well...but I don't have 21 step wedges of silver prints to fade > side by side...wish I did. > > Robert > > On 9/12/01 6:15 AM, "Michael J. Kravit" <kravit@...> wrote: > >> Last eveing I was speaking with another photographer by telepone. He >> told me that in California Huntington Witheral is ready to give up on >> Piezo because his display prints are losing 2 stops of density after >> just 60 days on display. >> >> Supposedly he has spoken with Jon Cone and Cone told him it was his >> paper. So he has tried numerous papers and has not been able to keep >> the prints from losing density (fading). >> >> Has anyone else measured the actualy loss in density of Piezo prints? >> >> MIke >> >> >> >> Please visit the Group Homepage to check the Files, Bookmarks, Polls and >> other >> resources as they are often being updated. The page is at: >> >> http://groups.yahoo.com/group/DigitalBlackandWhiteThePrint >> >> >> >> >> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ >> >> > > ---------------------- > Robert Morrison > rmorrison@... > > 310-397-2704 > > 4131 Bledsoe Ave. > Los Angeles, CA 90066 > > > > Please visit the Group Homepage to check the Files, Bookmarks, Polls and other > resources as they are often being updated. The page is at: > > http://groups.yahoo.com/group/DigitalBlackandWhiteThePrint > > > > > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ > > ---------------------- Robert Morrison rmorrison@... 310-397-2704 4131 Bledsoe Ave. Los Angeles, CA 90066
Message
Re: [Digital BW] Piezo - Loss of Density
2001-09-12 by Robert Morrison