Walt
Thanks for the formula---I'll try it when I get back to school. (It's Winter
break right now).
If anyone else has a formula for gravure tissue, I'd like to see it.
Mark
>From: Walt <wgoettman@mm.wyeth.com>
>Reply-To: wgoettman@mm.wyeth.com
>To: mark dungan <pinholeman@hotmail.com>
>CC: alt-photo-process-l@usask.ca
>Subject: photogravure pigment paper
>Date: Fri, 17 Dec 1999 08:08:51 +0000
>
>Mark- Here goes. Again this is from "A Handbook of Photogravure" by
>Johan de Zoete. He notes there is little literature on making pigment
>paper.
>
>Mix 100 gms pure photo gelatin with 400 mls distilled water. Allow to
>swell for one hour and warm gradually to 45-50 degrees centigrade. To
>the warm solution add in this order under constant stirring: 4 gms
>wetting agent, 15 gms ferric oxide(as pigment) and 15 gms glycerine.
>Ferric oxide is best purchased as a suspension, of which one must know
>the composition to be able to add the appropriate weight. If it is only
>available as a dry powder, stir it up with a little water.
>Pour the gelatin solution into a dish and keep for several hours at
>45-50c. During this interval you should draw rising air bubbles to the
>side of the dish with a piece of paper. Then a long strip of well-sized
>drawing paper which should have a weight of approx. 140gms/m2. Hold the
>paper in a loop between both hands and lower one end until it is just
>brought into contact with the surface of the gelatin. Then with an even
>rolling method, you progressively lift one end of the paper from the
>first point of contact with one hand while lowering the other end of the
>paper downwards with the other, so that at any one time just a narrow
>band of paper is allowed to touch the surface of the liquid. In carrying
>out this operation, you must take care that none of the gelatin mixture
>gets onto the back of the paper. When most of the paper has been coated
>in this way it is then hung up to dry.
>
>Good luck. I imagine Carbon Printers could help with modifications of
>this account. He cites on source(Elder) from early 1900s. I saw in
>another source that it had the name carbon tissue because carbon pigment
>used to be used.
>
>
>Walt
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