C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
400/7002
C09D 13/00 (2006.01)
Patent
CA 1098234
ABSTRACT OF THE DISCLOSURE Although it is known to produce images, writings or drawings by the use of conventional chalks and crayons, such images cannot be permanently fixed by simple means. Therefore, enamels are sometimes used to produce a permanent image. How- ever, such enamels are expensive and require firing at high temperatures. The present invention overcomes these problems by providing a drawing and painting stick, in the form of school chalk, for producing images adapted to be fixed by the use of heat. By means of such a stick, images, writing, drawings, and the like may be produced in the usual manner upon a base and then be permanently fixed by the application of moderate temperatures. Thus, the drawing and painting stick according to the invention allows the user to produce designs or drawings as if conventional chalks were being used, and then to fix them permanently, very quickly and simply, so that they adhere firmly and are impact-resistant. The stick comprises a major proportion of a thermoplastic or heat- curable thermosetting synthetic resin composition together with colouring matter including at least 5% by weight of the stick of pigment.
287240
Berghofer Theodor
Ridout & Maybee Llp
LandOfFree
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