Multi-color crayon or oil pastel and method of producing the same
AssigneesBuncho Corporation, Dong-A Pencel Co., Ltd.
InventorsKoji Seki, Yoshimi Kano
Life of this patent
Estimating the term…
Abstract
A multi-color crayon or oil pastel which features excellent drawing property, vividness of color and intimate adhesion of multi-color picture in combination, and a method of preparing the same. The multi-color crayon or oil pastel comprises a continuous matrix of a crayon or oil pastel material and a plurality of kinds of granular coloring phases dispersed in the matrix, the granular coloring phases being formed of a collapsible granular material which includes a coloring matter of a hue different from that of the continuous matrix, a body, and a water-soluble or solvent-soluble high molecular material or a water-swelling clay mineral (e.g., bentonite).
Claims5
A multi-color crayon or oil pastel comprising a continuous matrix of a crayon or oil pastel material and a plurality of kinds of granular coloring phases dispersed in the matrix, wherein the granular coloring phases are formed of a collapsible granular material which includes:
- (A) a coloring matter of a hue different from that of the continuous matrix;
- (B) a body;
- and
- (C) a water-soluble or solvent-soluble high molecular material or a water-swelling clay mineral.
A method of producing a multi-color crayon or oil pastel comprising:
- a step of preparing a collapsible granular material by mixing (A) a coloring matter having a hue different from that of the crayon or oil pastel material, (B) a body, and (C) a solution of a water-soluble or solvent-soluble high molecular material or of a water-swelling clay mineral, drying the mixture and, as required, pulverizing and classifying the mixture;
- and
- a step of dispersing a plurality of kinds of collapsible granular materials in the molten crayon or oil pastel material, followed by the injection molding to mold the mixture into a crayon or an oil pastel.
Dependencies are inferred from the claim text.