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