Process for the dyeing and printing of paper materials in differ

Details Process for the dyeing and printing of paper materials in differ Process for the dyeing and printing of paper materials in differ

1978-09-11

1980-09-23

Clingman, A. Lionel

Bleaching and dyeing; fluid treatment and chemical modification

Process of printing permanently on substrate, other than...

Azo dye

8645, 8669, 8667, 8670, D21H 146

Patent

active

042240255

ABSTRACT:
A process is described for the dyeing and printing of paper materials by the use of developing dyestuffs, in which process diazo components and heterocyclic coupling components containing a 6-membered heterocyclic radical having one ring nitrogen atom are applied in any sequence, either successively or simultaneously onto or into the paper material to be dyed or printed, and coupled together in alkaline, neutral or acid medium, whereby it is possible using only a single coupling component to obtain on the material, merely by variation of the diazo component, a shade of color ranging from yellow to black.

REFERENCES:
Lips, H. A. Paper Trade Journal, 1944, 118, TAPPI, 105-108.

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