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9781414255507 1414255500 The Lamp in the Desert, Ethel M Dell 9781409913498 140991349X The Traveller's Story of a Terribly Strange Bed (Dodo Press), Wilkie Collins

The blackboard crayon, or chalk, that is used in classrooms is commonly composed of calcium carbonate, kaolin clay, oleic acid, and caustic soda. Dry colour may be added to increase the whiteness or to impart specific colours. Modifications of the formulation, such as mixing pigment with a nongreasy binder as with pastels, have provided chalk crayons for more specialized use by artists, tailors, and carpenters. For lithographic prints a plain dark-coloured crayon made of wax, soap, lac, mastic, sheep tallow, lampblack, and sometimes copal is used to draw an image directly on the stone surface. See also conté crayon ; lithography ; pastel .


Crayons & Peder G - There You Go

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