[pure-silver] Re: Pyro Stain
- From: Sandy King <sanking@xxxxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Fri, 31 Dec 2004 16:24:48 -0500
OK, I posted the curves at apug. org under a thread called PMK VS
Pyrocat-HD Stuff, http://www.apug.org/forums/showthread.php?p=89547
Sandy
>Howard,
>
>If you like to see an H&D curve showing the difference between the
>way a PMK and Pyrocat-HD negative prints on VC paper, with the
>comparison negatives developed to the same CI (as measured by Blue
>mode of densitometer) I have made the comparison using Arista VC
>paper and would be happy to send you a copy of curve, or perhaps best
>post it to the technical gallery on apug.org. There is a very
>distinct and clearly visible difference in the look of the curve,
>even when the negatives are developed to the exact same CI, which
>should surprise no one since so many people have already commented on
>the difference.
>
>Sandy
>
>
>
>
>>At 09:07 PM 12/26/2004 -0500, you wrote:
>>>Howard,
>>>
>>>I won't be able to do that for a while because of travel plans. What
>>>does one need to make this kind of measurement, a spectrophotometer?
>>
>>
>>Yes, a vis/uv spectrometer is what is needed. I do not have one available
>>since I moved to New Mexico. That is why I thought of the Clemson
>>Chemistry department. I will do some checking after school starts up in
>>Santa Fe to see if one of the local schools may have the needed equipment.
>>Will let you know, and if all else fails, will probably see you at APIS or
>>at PhotoArts Santa Fe, July 8-17, 2005 (shameless commercial plug).
>>
>>
>>
>>
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