Ink and eraser of the ink

Details Ink and eraser of the ink Ink and eraser of the ink

1982-12-22

1985-12-10

Apley, Richard J.

Coating implements with material supply

Plural exposed tools each with individual supply

401 21, 401 17, 401 18, 401 19, 401 23, 252 891, 252 94, 106 20, B43K 2712, B43K 700

Patent

active

045576181

ABSTRACT:
Colored ink comprising a developer having a phenolic hydroxyl group, an electron-donating colorless dye which develops a color by the action of the developer, and a solvent which does not inhibit a color developing reaction. Handwriting written in this colored ink can be erased by using an eraser comprising a desensitizing compound which makes the colored electron-donating dye colorless.

REFERENCES:
patent: 1153807 (1915-09-01), MacPherson
patent: 2046022 (1936-06-01), Hughes
patent: 2393111 (1946-01-01), Lehman
patent: 2571620 (1951-10-01), Sala
patent: 3691270 (1972-09-01), Charle et al.
patent: 4228028 (1980-10-01), Lin
Wolfe; Printing & Litho Inks (Book); 1967; MacNair-Dorland Co.; p. 372.
Chem. Abst. 77-36347x; 1972; p. 105; vol. 77, Gronowska et al.
Chem. Abst.; 91-93197m; 1979; p. 91; vol. 91, Iwata et al.

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