Method for preparing haze-resistant lithium-silicate glare-reducing coating
AssigneeRCA Corporation
InventorsSamuel Broughton Deal, Donald Walter Bartch
Life of this patent
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Abstract
A glare-reducing coating, as for a viewing surface of a cathode-ray tube, is prepared by (a) warming the surface of a support to about 30.degree. to 100.degree.C, (b) coating the warm surface with an aqueous solution containing a lithium stabilized silica sol, (c) drying the coating, (d) baking the dry coating at about 150.degree. to 450.degree.C, and then (e) subsequent to said heating step (d), washing the dry coating with hot water. The coating may contain carbon particles or carbon particles and a color-correcting dye.
Claims6
A method for preparing an optical viewing screen having glare-reducing viewing surface consisting essentially of the steps of
- a. warming the surface of a glass support to about 30.degree. to 100.degree.C,
- b. coating said surface with an aqueous solution contining a lithium-stabilized silica sol,
- c. drying said coating,
- d. baking said dry coating to about 150.degree. to 450.degree.C,
- e. and then, subsequent to said baking step (d), washing said dry coating with water having a temperature above about 40.degree.C.
Dependencies are inferred from the claim text.