METHOD OF DYEING FUR IN ORGANIC SOLVENT MEDIA Russian patent published in 2006 - IPC D06P3/30 D06P3/06 

FIELD: fur industry.

SUBSTANCE: invention, in particular, relates to finishing hair side of fur and may be utilized to restore consumer's properties of fur articles. Dyeing of fur is carried out in dye bath containing (i) dissolved in isopropyl alcohol, acid dye taken in amount 1.3-1.5 g/L, while amount of isopropyl alcohol constitutes 4-6% of the volume of dye bath; (ii) tetrachloroethylene at liquid coefficient 20-25; and cationic surfactant in amount 1.0-1.5 g/L, followed by addition of formic acid in amount 40-50% of the weight of dye and conducting dyeing at 50-55°C for 2.0-2.5 h, after which fur is washed with tetrachloroethylene and then solvents from dye and washing bathes are regenerated. Method also enables restoration of consumer's properties of fur articles after dry-cleaning due to insignificant shrinkage of leather tissue.

EFFECT: improved environmental condition due to increased efficiency regeneration of solvents and reduced amount non-utilizable toxic wastes with properties of dyed fur preserved.

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