From: TERRY KING, 101522,2625
TO: Keith Schreiber, INTERNET:KEITH@CCP.Arizona.EDU
DATE: 08/02/96 11:27
RE: Copy of: Re: paper test data for palladium
Keith
I am grateful for your constructive reply.
I find that sizing the paper increases perceived contrast and gradation. Use of
a deionised size appears to avoid problems of adverse reactions between gelatine
and platinum.
I am very chary of reflection densitomiter readings in relation to hand coated
papers as subjective reactions differ markedly from from those of the
instrument.
I have a standard procedure where palladium is included in a coating, ( cf the
work of Mike Ware), which is that after the coating has been dried I place the
paper in the dark in association with a tray of warm water. This ensures that
the palladium prints black and not brown. Warmth of tone varies with the degree
of humidification. or ' humiliation' as students insist.
As to graininess, working with good cotton rag papers should ensure that it only
arises from overheating the paper after coating and the use of potassium
chlorate. I find this so offensive that I vary my contrast by using different
proportions of platinum and palladium in the mix. I have found consistency of PH
in the papers I use for platinum/palladium from Fabriano and GP inveresk,
Artistico and Waterford.
Now I have to work out which buttons to push to download your file.
Did you see my note on papers on 5 February, or have I managed to lose it in the
system?