Bleaching and dyeing; fluid treatment and chemical modification – Nontextile – dyeing process or product – including inorganic...
Patent
1992-09-02
1994-10-04
Lieberman, Paul
Bleaching and dyeing; fluid treatment and chemical modification
Nontextile, dyeing process or product, including inorganic...
8526, 8919, 2524081, 252964, C09B 6702, D06P 500
Patent
active
053522443
ABSTRACT:
A dye strip for tracing liquid flow comprises a water-soluble paper impregnated with tracing dye. The dye-impregnated paper is in a dry form prior to use. A process for preparing the biodegradable dye strip calls for providing a water-soluble paper, communicating the water-soluble paper with liquid dye to absorb said liquid dye into the paper and forming a resulting dye-impregnated paper. The resulting dye-impregnated paper is dried. The product can be placed into a vat containing liquid. Dye diffuses from the paper into the liquid to form dyed liquid. The flow of the dyed liquid is then observed.
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Dusheck Caroline L.
Lieberman Paul
Norlab, Inc.
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