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US 4,057,388 AGranted
Dry heat process for dyeing and printing organic material which can be dyed with cationic dyestuffs
AssigneeCiba-Geigy Corporation
InventorsRaymond Defago, Paul Schaffluetzel, Arnulf Ruediger Lapple, Bernard Hugelin
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Abstract
In a dry heat process for dyeing and printing of organic material which can be dyed with cationic dyestuffs, the improvement wherein at least one transferable salt of a cationic dyestuff with an acid having a pK.sub.s value greater than 3 is used for dyeing and printing.
Claims22
In a dry heat transfer printing process which comprises
- A. bringing a treated face of an auxiliary carrier into contact with the surface of an organic material to be dyed, the treated face of the auxiliary carrier being dry and bearing at least one color layer which contains dyestuff which passes into the vapor state under the transfer process conditions,
- B. subjecting the carrier and the material while contacted to the action of heat for a sufficient time to effect transfer of the vaporizable dyestuff from the auxiliary carrier to the organic material to be dyed, and
- C. separating the organic material from the auxiliary carrier,
- the improvement according to which at least one color layer of the said auxiliary carrier contains at least one transferable salt of a cationic dyestuff with an acid having a pK.sub.s value greater than 3.
1 more element
Dependencies are inferred from the claim text.