Stain: Can be any color, usually blue, absorbed
Contains: Basic, or soluble aniline dyes, insoluble organic solvents, oils, resins, gums, binding agents such as shellac, varnish or petroleum
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Apply drycleaning solvent.
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Apply POG, blot.
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Apply drycleaning solvent, blot.
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Apply amyl acetate if available, or acetone (except on acetate fibers).
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If stain remains, apply rust remover or oxalic acid solution.
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Bleaching (or professional stripping) may be necessary.