Sizing gum layers

Discussion in 'Alternative Processes' started by stephen_gray98, Aug 7, 2011.

  1. stephen_gray98

    stephen_gray98 Member

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    Hello.

    I've heard it is a good idea to size each layer when doing multiple layer gum bichromate pictures to stop bleeding etc. and wondered if clear gesso would do the trick ?

    SPG
     
  2. sly

    sly Subscriber

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    I've never sized between layers of gum. I have had problems with gum flaking off when I double coated with gelatin size. (Had extra. Thought it was clever to use it up. It wasn't.)
     
  3. musila

    musila Member

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    I only size once in the right after preshrinking the paper. With diluted Polyvinyl Acetate. I've never had a problem with staining or bleeding. I used Gesso, granted it was pigmented, but didn't like how it looked. I might try an albumen size later, when I run out of the PVA.

    If you have issues with bleeding, it might be that your emulsion is too thick, and gravity compresses the emulsion before it dries.
     
  4. Philippe Berger

    Philippe Berger Member

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    I prefer Gum without layer of gelatin and directly on the watercolour paper