Negative Technique

Welcome Forums Product Questions Negative Technique

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    • #21192
      rene
      Participant

      Hello,

      for the negative technique I use a powder given me by a friend in China. I dissolve this powder in hot water.

      Does anybody nows which chemical is this powder?

      René

      rene@rene-boell.de

    • #21292
      Tetsu Uma
      Participant

      Is it possibly peach sap or alum?

    • #21296
      Rene
      Participant

      Yes, I think alum is correct, I will try the peach sap.

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