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A method for preparing a decorative glass using a glass etching composition, wherein a frosting of elaborate patterns and designs is applied on the surface of the glass having an arbitrary shape, such a plane, a curved plane or a tube, by utilizing the silk-screen process or the like, using a glass

A method for preparing a decorative glass using a glass etching composition, wherein a frosting of elaborate patterns and designs is applied on the surface of the glass having an arbitrary shape, such a plane, a curved plane or a tube, by utilizing the silk-screen process or the like, using a glass etching composition characterized as comprising 1 to 20 w/v % (preferably, 2 to 5 w/v %) of a fluoride, 20 to 80 v/v % (preferably, 20 to 50 v/v %) of water and 20 to 80 v/v % (preferably, 50 to 80 v/v %) of an organic solvent miscible with water or another glass etching composition comprising the former composition and an additive. The glass etching composition is free from the problems of the danger to a human body and environmental pollution.

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The invention claimed is: 1. A glass etching composition comprising from 1 to 20 w/v % of a fluoride selected from the group consisting of sodium fluoride, potassium fluoride, ammonium fluoride, sodium bifluoride, potassium bifluoride, ammonium bifluoride, ammonium borofluoride and ammonium silicof

The invention claimed is: 1. A glass etching composition comprising from 1 to 20 w/v % of a fluoride selected from the group consisting of sodium fluoride, potassium fluoride, ammonium fluoride, sodium bifluoride, potassium bifluoride, ammonium bifluoride, ammonium borofluoride and ammonium silicofluoride, from 20 to 80 v/v % of water selected from the group consisting of tap water, ion-exchanged water, distilled water, pure water, ground water, spring water, filtered water or a mixture thereof, from 20 to 80 v/v % of at least one organic solvent miscible with water, selected from the group consisting of glycerin, a glycol selected from methyl glycol, ethyl glycol, methylene glycol, ethylene glycol, propylene glycol, dimethylene glycol, diethylene glycol, dipropylene glycol, polymethylene glycol and polyethylene glycol, a glycol ether selected from ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monoisopropyl ether, diethylene glycol monobutyl ether, dipropylene glycol monomethyl ether, dipropylene glycol monoethyl ether, dipropylene glycol monoisopropyl ether and dipropylene glycol monobutyl ether, and an alcohol selected from methyl alcohol, ethyl alcohol, n-propyl alcohol, isopropyl alcohol, n-butyl alcohol, isobutyl alcohol, 1,2-ethane diol, 1,2-propane diol, 1,3-propane diol, 1,4-butane diol, 1,2,3-propane triol, 1,2,6-hexane triol and sorbitol, and 1-10 v/v % of at least one inorganic acid selected from the group consisting of hydrochloric acid, sulfuric acid and nitric acid. 2. A glass etching composition as claimed in claim 1, wherein said fluoride is contained from 3 to 8 w/v %, said water is contained from 20 to 50 v/v %, said organic solvent is contained from 50 to 80 v/v % and said inorganic acid is 3 to 6 v/v %. 3. The glass etching composition as claimed in claim 1, wherein the fluoride comprises ammonium fluoride, sodium bifluoride, ammonium bifluoride or a mixture thereof. 4. The glass etching composition as claimed in claim 1, wherein said organic solvent miscible with water is at least one selected from the group consisting of glycerin, ethanol, ethylene glycol, propylene glycol and polyethylene glycol. 5. A glass etching composition as claimed in claim 1, further comprising a surfactant selected from the group consisting of an anionic surfactant selected from dodecylbenzene sodium sulfonate, an alkylbenzene sodium sulfonate, lignin calcium sulfonate, a perfluoroalkyl sulfonate, a perfluoroalkyl carboxylate and a perfuloroalkyl phosphate, a non-ionic surfactant selected from polyoxyethylene acetyl ether, polyoxyethylene lauryl ether, polyoxyethylene oleyl ether, polyoxyethylene stearyl ether, a polyoxyethylene alkyl ether, polyoxyethylene octyiphenyl ether, polyoxyethylene nonyiphenyl ether, sorbitan laurate, sorbitan palmitate, sorbitan oleate, sorbitan stearate, polyoxyethylene sorb itan monolaurate, polyoxyethylene sorbitan monopalmitate, polyoxyethylene sorbitan monooleate and polyoxyethylene sorbitan monostearate, an ampholytic surfactant selected from a dimethylalkyl betaine, an alkyl glycine, amide betaine, imidazoline, a perfluoroalkylaminosulfonate and a perfluoroalkyl betaine, and a cationic surfactant selected from octadecyldimethylbenzyl-ammonium chloride, an alkyldimethylbenzylammonium chloride, tetradecyldimethylbenzyl-ammonium chloride, dioleyldimethylammonium chloride, octadecyltrimethylammonium chloride, an alkyltrimethylanimonium chloride, dodecyltrimethylammonium chloride, hexadecyltrimethylammonium chloride, octadecylamine acetate, hexadecylamine acetate, perfluoroalkyltrimethylammonium salt and perfluoroalkyl quaternary ammonium salt. 6. A frosting method for frosting a surface of a glass comprising rinsing the surface of the glass with a rinsing liquid, removing the rinsing liquid thoroughly from the surface thereof, blocking a portion of the glass unnecessary for etching on the surface thereof by masking when needed, etching the surface thereof with the composition as claimed in claim 1 or 2 by immersing the glass in the composition or by coating the surface thereof with the composition with a writing brush or a coating brush or squeezing the composition, and rinsing the surface thereof again to remove the glass etching composition remaining on the surface thereof. 7. A frosting method for frosting the surface of a glass comprising filling a tube, a ball-point pen, a signing pen, a marker pen, a felt pen, a brush-like pen, a container with a writing brush or a coating brush or a device with spongy matter mounted at an end, an air gun spray device, a hand spray device or an aerosol device with the composition as in claim 1 or 2, and coating or spraying directly the surface of a glass therewith. 8. A frosting method for frosting a surface of a glass comprising coating a soft film or sheet with the composition as claimed in claim 1 or 2, superimposing the soft film or sheet into a composite member, and bringing the composite member in the form of a sheet or a roll into direct contact with the surface of the glass. 9. A frosting method for frosting a surface of a glass comprising rinsing the surface of the glass with a rinsing liquid, removing the rinsing liquid thoroughly from the surface of the glass and blocking the portion of the surface thereof unnecessary for etching by masking when needed, applying to the surface thereof the glass etching composition of claim 1 or 2 by means of any of: immersing the glass in the composition, coating the surface thereof with the composition with a writing brush or a coating brush or squeezing the composition, or by filling a tube, a ball-point pen, a signing pen, a marker pen, a felt pen, a brush-like pen, a container with a writing brush or a coating brush or a spongy matter mounted at one end, an air gun spray device, a hand spray device or an aerosol device with the composition and coating or spraying directly the surface of a glass therewith or by coating a soft film or sheet with the composition superimposing the soft film or sheet into a composite member, and bringing the composite member in the form of a sheet or a roll into direct contact with the surface of the glass or spraying the glass therewith to expose the surface of the glass to the composition, and rinsing the surface thereof again to remove the composition remaining on the surface. 10. The frosting method for frosting the surface of the glass as claimed in claim 9, wherein said applying of said glass etching composition is done by immersing the glass in the composition or by coating the surface thereof with the composition with a writing brush or a coating brush or squeezing the composition, and said rinsing liquid is water, a soap, a household detergent or other rinsing agents. 11. The frosting method for frosting a surface of a glass according to claim 9, wherein said masking is carried out by a process using an oily pen or an oily paint, a resin paint, an acrylic paint, a masking tape, a seal, an adhesive sheet, a transcription sheet, ultraviolet curable resin or ultraviolet curable resin film, a photoresist technique, a silk screen printing technique or any other printing technique. 12. A frosting method for frosting a surface of a glass, comprising coating the surface of the glass with a glass etching composition comprising from 1 to 20 w/v % of a fluoride selected from the group consisting of sodium fluoride, potassium fluoride, ammonium fluoride, sodium bifluoride, potassium bifluoride, ammonium bifluoride, ammonium borofluoride and animonium silicofluoride, from 20 to 80 v/v % of water selected from the group consisting of tap water, ion-exchanged water, distilled water, pure water, ground water, spring water, filtered water or a mixture thereof, from 20 to 80 v/v % of at least one organic solvent miscible with water, selected from the group consisting of glycerin, a glycol selected from methyl glycol, ethyl glycol, methylene glycol, ethylene glycol, propylene glycol, dimethylene glycol, diethylene glycol, dipropylene glycol, polymethylene glycol and polyethylene glycol, a glycol ether selected from ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monoisopropyl ether, diethylene glycol monobutyl ether, dipropylene glycol monomethyl ether, dipropylene glycol monoethyl ether, dipropylene glycol monoisopropyl ether and dipropylene glycol monobutyl ether, and an alcohol selected from methyl alcohol, ethyl alcohol, n-propyl alcohol, isopropyl alcohol, n-butyl alcohol, isobutyl alcohol, 1,2-ethane diol, 1,2-propane diol, 1,3-propane diol, 1,4-butane diol, 1,2,3-propane triol, 1,2,6-hexane triol and sorbitol, and 1 to 10 v/v % of at least one inorganic acid selected from the group consisting of hydrochloric acid, sulfuric acid and nitric acid. 13. The frosting method as claimed in claim 12, wherein said glass etching composition comprises from 3 to 8 w/v % of the fluoride, from 20 to 50 v/v % of water, from 50 to 80 v/v % of the organic solvent miscible with water, and from 3-6 v/v % of the inorganic acid. 14. The frosting method as claimed in claim 12, wherein the fluoride comprises ammonium fluoride, sodium bifluoride, ammonium bifluoride or a mixture thereof. 15. The frosting method as claimed in claim 12, wherein said organic solvent miscible with water comprises at least one selected from the group consisting of glycerin, ethanol, ethylene glycol, propylene glycol and polyethylene glycol.