Re: dark gums
Chris, I was interested to look for those layers in the prints at MOMA. Many of the prints showed two distinct layers, a medium gray and a black. These were often visible as mis-registrations near the edges of the prints due to shrinkage of the paper. It is very possible that the black I saw was made up of multiple layers over the gray, but there was never any mis-registration showing in the black layer. This led me to suspect that there may have been only 2 coats. By the way there were gum over platinums where I would assume the paper had not been pre-shrunk since the platinum image was significantly smaller that the gum image at the edges. Possibly the same use of non shrunk paper is why the first layer of gum was so far off registration but the later layers may have registered perfectly... It would be so much fun to gather several of us together at one of these institutions that has a collection of period prints and look and discuss what we each see in them. Let's get a grant to do that! Jack > From: "Christina Z. Anderson" <zphoto@montana.net> > Reply-To: alt-photo-process-l@usask.ca > Date: Tue, 23 Jan 2007 08:50:31 -0700 > To: alt-photo-process-l@usask.ca > Subject: Re: dark gums > > I think the usual number of layers around > 1900's was 3-6, and some even did up to 15--which is certainly not > necessary....
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