How To Solve Burnt Edge in Enamel Hot Pot

Manufacturers of enamel hot pots may encounter the problem that holes are prone to burnt edges. As an enamel frit raw material manufacturer, Nolifrit technical staff solved this problem through experiments. The following is a sharing of solutions for the burnt edges of enamel hot pots:

First, the key is to choose a fire-resistant enamel frit. Fire-resistant enamel frit has high thermal stability and can withstand high-temperature baking, preventing the porcelain layer from cracking or falling off, thereby reducing the occurrence of burnt edges.

Secondly, the enamel slurry used to make enamel frit needs to have good retention properties. Retention refers to the residence time of enamel slurry after being applied to the enamel surface. If the residence time is too long, the enamel slurry will be overly dry and it will be difficult to form a uniform coating; if the residence time is too short, the enamel slurry may not fully adhere to the enamel surface. Therefore, when making enamel slurry, it is necessary to select an appropriate retention agent and control the retention time so that the enamel slurry can evenly cover the enamel surface.

In addition, the firing temperature is also an important factor affecting the burnt edge problem. If the firing temperature is too high, the enamel material will be over-sintered, burned and boiled. Therefore, the temperature must be reasonably controlled during the firing process to avoid excessive temperature.

In addition, the firing time also needs to be reasonably controlled. Firing for too long will cause the glaze layer to be over-sintered, exacerbating the problem of burnt edges. Therefore, when making enamel hot pot, it is necessary to determine the appropriate firing time according to the specific conditions to ensure the quality of the enamel.

Finally, in the process of painting, technique is also very critical. When applying enamel, the enamel slurry needs to be evenly applied on the enamel surface to ensure that the edges of the holes can be evenly covered with enamel slurry. If the application is uneven, it can easily lead to burnt edge problems. Therefore, when applying enamel, it is necessary to master the strength and speed of application to ensure the uniformity of the coating.