With the rapid development of science and technology and industrial production, the application scope of investment casting process is expanding. Waxes are difficult to keep pace with the rapidly developing investment casting industry in terms of performance and quantity. So, all kinds of organic matter, plastic and inorganic salts and other materials have been used. Some are added to the wax as filler, and some are moulded directly in place of wax. Therefore, wax mold, wax material is gradually replaced by mold, investment mold. However, the general situation is still used to people called "wax mold". But this "wax model" is not the "wax model".

      Medium temperature wax precision casting is matched with silica sol shell making process, while low temperature wax is generally matched with sodium silicate shell making process. It is characterized by line shrinkage and simple equipment. Hot processing industry forum, it is not the same as the wax treatment of medium temperature model wax, medium temperature wax is dehydration purification process, low temperature wax is the reaction process of removing saponification.

The properties of medium temperature wax are described as follows:

1. The medium temperature model wax is matched with silica sol shell making process, while the low temperature wax is generally matched with sodium silicate shell making process.

2. The shrinkage of medium-temperature waxes is greater than that of low-temperature waxes, which contain water vapor.

3. Medium temperature waxes are more stable in size and more expensive than low temperature waxes.

4. The wax treatment of medium temperature wax is different. Medium temperature wax is dehydrated and purified, while low temperature wax is reaction treatment to remove saponification.

      Physical properties of medium temperature wax precision casting materials: mainly rosin-based wax mold and filled mold, melting point 70-100 degrees Celsius, mainly used for castings with high size and surface requirements, generally used for stainless steel and medium high alloy steel products. Dewaxing with steam or microwave. The wax can be reused. Medium temperature wax with silicon sol shell and operating process, and low temperature wax with sodium silicate shell process. Medium - temperature waxes shrink more than low - temperature waxes because the low - temperature waxes contain water vapor.