Soleau Envelope n°63471 relating to the "fixative medium" of IKB, May 19 1960

  • Soleau Envelope n°63471 relating to the "fixative medium" of IKB
    Copy sent to INPI and returned to Yves Klein, containing two sheets of handwritten text describing the chemical formula of IKB.
    5 1/2 x 9 inch
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