Hi Devon, Thanks for the explanation. I never thought a sun print process, but that make a lot of sense.
I used to make blue line prints and that process used ammonia to set the lines; but you still had to be careful not to keep the paper in the light too long before running it through the machine. I'm glad they aren't being used anymore. Paper cuts from those sheets were deep and painful. I kept threatening to claim workman's comp every time I had to put a plan set together back in my Junior Civil Engineering days <G>. Kathy -------------------------------------------- On Wed, 11/27/13, dmt11h...@aol.com <dmt11h...@aol.com> wrote: These are cyan prints. You put a piece of lace on a treated paper and then place it in the sun to make them. They are a primitive form of photography, but not, I think terribly expensive in the era to which you refer. Kids still make these sun prints in science class and summer camp often of leaves and ferns. I had blue prints like these from my lace teacher in the 1970s when photocopying was still in its infancy. I think that it was still quite a common way to provide an image at that time. <SNIP> - To unsubscribe send email to majord...@arachne.com containing the line: unsubscribe lace y...@address.here. For help, write to arachne.modera...@gmail.com. Photo site: http://www.flickr.com/photos/lacemaker/sets/
