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3928Re: Indigo

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  • hamburgerbuntpapier_de
    Jan 10, 2007
      Thank you, Feridun. I should - and could! - have known it but it somehow had escaped my
      mind. Grrr.

      Susanne Krause

      --- In Marbling@yahoogroups.com, "Feridun Ozgoren" <feridun.ozgoren@...> wrote:
      >
      > Greetings,
      >
      > Indigo is both a dye and a pigment, depending on whether oxidized or not.
      > Before oxidation it is a yellow liquid that the fabrics dyed in and hung
      > for oxidation, this makes the fabrics blue in color, after oxidation it
      > precipitates as blue pigment which is water insoluble (pigment), that is
      > what marblers and other water color artists used for centuries.
      >
      > Feridun Ozgoren
      >
      >
      >
      > _____
      >
      > From: Marbling@yahoogroups.com [mailto:Marbling@yahoogroups.com] On Behalf
      > Of hamburgerbuntpapier_de
      > Sent: Wednesday, January 10, 2007 7:08 AM
      > To: Marbling@yahoogroups.com
      > Subject: [Marbling] Indigo
      >
      >
      >
      > Indigo is not a pigment, it is a dye. This means, it needs fixation to
      > connect chemically to
      > the fibre. In textiles, this is achieved by putting the material through a
      > special bath at high
      > temperature - not what paper likes! If not fixated, indigo runs in just the
      > way you
      > describe, Iris, and an amazingly small amount of indigo can do amazingly big
      > damage.
      >
      > Susanne Krause
      >
      >
      >
      >
      >
      > [Non-text portions of this message have been removed]
      >
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