Unburnt lead refill for writing and drawing pencils

Details Unburnt lead refill for writing and drawing pencils Unburnt lead refill for writing and drawing pencils

1975-09-08

1977-05-17

Ziegler, J.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106 22, 106 23, 106 31, C09D 1114

Patent

active

040239748

ABSTRACT:
An unburnt lead refill for writing and drawing pencils, particularly for use on drawing cloth, consisting of dyestuff, lubricant, filling material, binding agent and, if required, wax. The binding agent is methyl cellulose and/or methyl hydroxy-ethyl cellulose and/or methyl hydroxy-propyl cellulose and/or hydroxy-ethyl cellulose which is/are dissolved in water and emulsified with an addition of benzyl alcohol, benzaldehyde or a mixture of benzyl alcohol and benzaldehyde.

REFERENCES:
patent: 2105310 (1938-01-01), Chesler
patent: 2566754 (1951-09-01), Van Dusen et al.
patent: 2682476 (1954-06-01), Nurnberg

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