Method of forming coated layer of fluorescent substance on...

Details Method of forming coated layer of fluorescent substance on... Method of forming coated layer of fluorescent substance on...

B - Operations, Transporting

05

D

117/21

B05D 5/06 (2006.01)

Patent

CA 1095781

11 48,208 2 ABSTRACT OF THE DISCLOSURE Method for coating fluorescent material on the inner surface of a bulb using a coating lacquer comprising an aqueous suspension of the finely divided fluorescent material, an organic water soluble polymer, a surfactant, and colloidal alumina as a binder, the improvement which comprises incorporating boric acid and hydrogen peroxide in the suspension. When the coated lacquer is burned out by heating the bulb, the boric acid melt coats the alumina binder to render same inactive for gas absorption and the hydrogen peroxide accelerates the combustion or burning out of the organic polymer and surfactant from the coated lacquer.

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