Chemical formulation for reclaiming silk screens

Details Chemical formulation for reclaiming silk screens Chemical formulation for reclaiming silk screens

1983-01-24

1984-03-06

Kittle, John E.

Compositions

Compositions containing a single chemical reactant or plural...

Organic reactant

252156, 252162, 252170, 252364, 106311, 101129, 101424, C11D 706

Patent

active

044353057

ABSTRACT:
A non-aqueous liquid chemical formulation for reclaiming silk screens by removing simultaneously the stencil emulsion and ink is described. The silk screen is contacted with the liquid for a period sufficient to loosen the hardened stencil emulsion and the ink from the surface of the silk screen. The non-aqueous liquid chemical formulation is typically placed in a carbon steel tank at ambient temperature and the silk screen is immersed in the liquid for approximately five minutes. Alternately, the silk screen can be sprayed with the liquid formulation and allowed to soak for approximately seven minutes. The softened ink and stencil emulsion are then removed by using a high pressure water jet stream. The formulation contains an alkali metal hydroxide, a monohydric or polyhydric alcohol, a glycol ether, a surfactant, aliphatic and/or aromatic hydrocarbons and a wax.

REFERENCES:
patent: 3031409 (1962-04-01), Perlman et al.
patent: 3773677 (1973-11-01), Boyles
patent: 3853782 (1974-12-01), Change
patent: 3954648 (1976-05-01), Belcak et al.

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