Spirit duplicating with indicia formed by ink comprising dye means and smudge-resistant binder means soluble in spirit duplicating fluid
US4565841A · kind A · utility
1Cited by
11References
30Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 10, 1979 |
| Grant date | Jan 21, 1986 |
| Priority date | — |
| Expiry date | Sep 10, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S260/38
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A spirit duplicating master ink contains more than 50 weight % of methyl violet, a binder of poly(vinyl methyl ether) that is of the order of 5 weight % and a 2-ethoxy-ethanol carrier solution of the order of 30 weight % with corn starch filler of the order of 10 weight %. This ink is printed upon a spirit duplicating master to leave a residue with the methyl violet weight % of the order of 73%, that of the 2-ethoxy-ethanol of the order of 7% and that of the corn starch of the order of 20%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.