Method for surface coloration during chemical toughening of milky-white glass

Abstract

The invention relates to a method for surface coloration during chemical toughening of milky-white glass. According to the method for surface coloration during chemical toughening of milky-white glass, the production process of a milky-white glass product comprises the following steps: proportioning materials, mixing the materials, uniformly stirring the mixed materials, feeding the stirred materials into a furnace, melting the materials to form a glass liquid, performing feeding forming and performing chemical toughening, wherein the temperature of milky-white glass tableware during chemicaltoughening preparation is 520-550 DEG C, and the temperature of a chemical toughening medium potassium nitrate liquid is 350-450 DEG C. A coloring agent is added into the potassium nitrate liquid, andcoloring is carried out on the milky-white glass tableware while the toughening is carried out. According to the invention, compared with the prior art, the method provided by the invention is adopted to carry out chemical toughening and surface coloring on the milky-white glass tableware, due to the fact that the appearance quality of products is improved, the colors are diversified, and therefore personalized requirements can be met, so that the sales market of the products is greatly expanded. In addition, coloring and chemical toughening are carried out at the same time, so that the technological process of products is reduced, electricity and gas are saved, the environment pollution is reduced, and certain social benefits and economic benefits are achieved.

Description

technical field [0001] The invention relates to the technical field of daily-use glass tableware, in particular to the surface coloring of opal glass tableware during chemical tempering. Background technique [0002] There are two ways to improve the mechanical strength and heat resistance of opal glass tableware. One is physical tempering, which is wind tempering. The method is to heat the glass tableware to 5-20°C below the softening point of the glass, and then quickly blow it to cool it, so that a uniform compressive stress layer is formed on the glass surface, thereby improving the mechanical strength and heat resistance of the glass. . However, for products with complex shapes and large thickness differences between parts, air tempering will not only fail to improve the mechanical strength and heat resistance of the product, but will cause a large number of products to burst during tempering. Therefore, chemical tempering for this type of product is the only one. cho...

AI Technical Summary

Problems solved by technology

[0006] 1. Add colorant to the glass raw material to make the glass into an overall colored opaque glass. The disadvantage is that the amount of colorant is large, the cost is high, it takes many days to change the color, and the change of transition color is unpopular;

[0007] 2. Ion exchange coloring on the glass surface, the method is to add ion-colored salts to fillers (such as ZrO2, clay, etc.), binders (dextrin, gum arabic, turpentine, etc.) to make a paste, and apply it on the glass surface Reheating treatment, some colors need to be reduced and calcined, and some colors must be colored in a neutral atmosphere, the process is complicated, the production efficiency is low, and the cost is high;

[0008] 3. Spray coloring: one is spraying low-temperature paint, organic coloring, low-temperature baking color is not durable, easy to wear and fall off; the other is spraying inorganic paint coloring and high-temperature baking, where spraying coloring, colorant waste is large and costly, and when spraying will pollute the environment and endanger the health of the

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