Abstract: A fluorescent lamp including a lamp bulb which has been coated with phosphor powder which has been ground in an attritor to reduce the powder weight without loss in light output and light maintenance. A process to produce such a fluorescent lamp utilizes a particular sequence of steps including firing, milling, attritor milling, and washing to produce an improved stir-in alkaline earth halophosphate.

Abstract: Disclosed is a yellow incandescent bugfoiler pigment coating comprising a fine-ground blend of praseodymium doped zirconium silicate and silica. This cadmium-free blend is applied electrostatically in three coats to the interior of a bulb to diffuse the light and block the emitted UV wavelengths. The color of the blend will intensify with increasing heat and return to its initial yellow color upon cooling.

Abstract: A fluorescent lamp including a lamp bulb which has been coated with phosphor powder which has been ground in an attritor to reduce the powder weight without loss in light output and light maintenance. A process to produce such a fluorescent lamp is also provided.

Abstract: Disclosed is a method for applying a yellow incandescent bugfoiler pigment coating comprising a fine-ground blend of praseodymium doped zirconium silicate and silica. This cadmium-free blend is preferably applied electrostatically in three coats to the interior of a bulb to diffuse the light and block the emitted UV wavelengths. The color of the blend will intensify with increasing heat and return to it's initial yellow color upon cooling.

Abstract: An improved method for preparing a phosphor is disclosed. The method of the invention includes preparing a solution comprising the non-oxygen elements of the phosphor in molar proportions equal to the respective molar proportions of the non-oxygen elements in the phosphor; precipitating the non-oxygen elements from the solution through the addition of a precipitating agent; spray drying the solution including the precipitate to form a spray dried powder; and firing the spray dried powder in a single firing step. The single firing step of the method comprises (a) increasing the temperature of the spray dried powder at an even and controlled rate from room temperature to a firing temperature sufficiently high to convert the spray dried powder to the phosphor; and (b) maintaining the temperature of the spray dried powder at the firing temperature for a period of time sufficient to produce the phosphor. The method is particularly useful in the preparation of Eu.sup.2+ -activted strontium borate phosphor.

Abstract: Lumen maintenance of fluorescent lamps is improved by dispersing throughout the phosphor a small quantity, less than 0.2% by weight of the phosphor, of a metallic borate. The improvement is realized in lamps with or without an internal conductive coating.

Abstract: A transparent, electrically conductive film of tin oxide is formed on the inner surface of tubing or blown glassware by dispensing therein a solution containing tin chloride and hydrofluoric acid. The solution is dispensed while the glassware is being formed and while the glass is in a softened state.

Abstract: A fluorescent lamp has an electroconductive tin oxide transparent film on the inner surface of the lamp envelope and a protective coating of magnesium fluoride-titania thereover.