Carbonless copying paper

Details Carbonless copying paper Carbonless copying paper

1973-10-04

1977-01-18

Lovering, Richard D.

Textiles: manufacturing

428307, 428914, B41L 136

Patent

active

040035891

ABSTRACT:
Carbonless copying paper comprising paper coated with microcapsules containing a dye solution which is composed of a solvent, a dye which gives color under acidic conditions and a mineral oil, said dye solution including as solvent one or more of alkylnaphthalenes of the general formula ##STR1## WHEREIN R represents C.sub.1 -C.sub.4 alkyl group, n is an integer of 1-4, and R may be the same or different when n is 2-4, the total number of carbon atoms in R's being 4-6. Such carbonless copying papers exhibit excellent color development and are non-toxic and biodegradable, thus causing no environmental pollution when they are discarded.

REFERENCES:
patent: 2800457 (1957-07-01), Green et al.
patent: 3016308 (1962-01-01), Macaulay
patent: 3627581 (1971-12-01), Phillips, Jr.

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