Method for applying an inorganic coating to a glass surface
First Claim
1. In a method for forming an inorganic coating on the surface of glass by directing onto said surface at an elevated temperature, a gas stream containing a vapor of a metal compound which is thermally decomposable to form said inorganic coating, the improvement of establishing in a zone in close proximity to said surface a relative humidity of at least about 55 percent, sufficient to increase the rate of formation of said metal oxide on said surface.
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Abstract
Inorganic coatings for glass surfaces, especially hot end coatings for glassware, are produced by applying vapors of thermally decomposable metal compounds such as stannic chloride to the surface of glass at an elevated temperature and maintaining in a zone adjacent to and in close proximity to the heated surface a region of elevated moisture content. In a preferred form, separate streams of metal compound vapor and water vapor are directed onto the surface of the heated glass.
51 Citations
16 Claims
- 1. In a method for forming an inorganic coating on the surface of glass by directing onto said surface at an elevated temperature, a gas stream containing a vapor of a metal compound which is thermally decomposable to form said inorganic coating, the improvement of establishing in a zone in close proximity to said surface a relative humidity of at least about 55 percent, sufficient to increase the rate of formation of said metal oxide on said surface.
- 10. In a method for applying an inorganic coating to glassware by contacting glassware at an elevated temperature with a thermally decomposable compound, the improvement of directing onto the surface of said glassware a stream of a vapor of said thermally decomposable compound and a separate stream of steam, wherein said streams are not permitted to contact one another until they are in a zone in close proximity to the surface of said glassware.
Specification