Luminous paints.

Manufacturer and builder 3 / 1893

Various articles have been published about luminous paints, and different lines of manufacture are employing them. One of our German contemporaries present a series of receipts for paints of this kind, showing how they may be prepared in different colors. At the outset it is remarked that all the paints mentioned below can be used in the manufacture of colored paper if the varnish is entirely omitted and the dry mixtures ground to a paste with water.

The luminous paints can also be used as wax colors for painting on glass and similar objects by adding, instead of hte varnish, 10 per cent more of Japanese wax and onefourth the quantity of the latter of olive oil. The wax colors prepared in this way may also be used for painting upon porcelain, and are then carefully burned without access of air. Paintinghs of this kind can also be treated with water glass.

For orange luminous paint 46 parts varnish are mixed with 17,5 parts prepared barium sulphate, 1 part prepared Indian yellow, 1,5 parts prepared madder and 38 parts luminous calcium sulphide.

For yellow luminous paint, 48 parts varnish are mixed with ten parts prepared barium sulphate, 8 parts barium chromate and 34 parts luminous calcium sulphide.

For green luminous paint 48 parts varnish are mixed with 10 parts prepared barium sulphate, 8 parts chromium oxide green and 34 parts luminous calcium sulphide.

A blue luminous paint is prepared from 42 parts varnish, 10,2 parts prepared barium sulphate, 6,4 parts ultramarine blue, 5,4 parts cobalt blue and 46 parts luminous calcium sulphide.

A violet luminous paint is made from 42 parts varnish, 10,2 parts prepared barium sulphate, 2,8 parts ultramarine violet, 9 parts cobaltous arsenate and 36 parts luminous calcium sulphide.

For gray luminous paint 45 parts of the varnish are mixed with 6 parts prepared barium sulphate, 6 parts prepared calcium carbonate, 0,5 part blue, 6,5 parts gray zinc sulphide.