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In order to produce high-quality molds, and considering the current technical level and quality of mold manufacturing in China, the process of mold production is described below for reference. I. Conditions for manufacturing molds 1. Environmental conditions Temperature: Throughout the entire process of manufacturing male and female molds, the same environmental temperature must be maintained, namely 21~28°C. Humidity: Humidity has a significant impact on the curing of the coating and resin; the ideal humidity range is 40–60%. If the relative humidity exceeds 65% during mold manufacturing, it is necessary to wait until suitable production conditions are achieved before proceeding. 2. Clean workshop: High-quality molds cannot be produced in a dirty environment. The areas where the male and female molds are manufactured must be kept extremely clean, and higher standards of maintenance and management are required there compared to the areas where the products are manufactured. Therefore, dust removal and cleaning of the mold manufacturing area should be carried out well in advance, at the start of mold production. 3. Clean compressed air: A pure and dry air supply is another essential factor in manufacturing high-quality molds. Otherwise, numerous pinholes and blemishes will appear on the surface of the mold coating, requiring significant labor effort to repair them; this, in turn, has a major impact on the quality of the mold. The air compressor needs to be installed in a suitable environment, and it should be equipped with an effective air dryer and an oil-water separator. 4. Selection of raw materials and auxiliary materials: Choosing high-quality raw materials and auxiliary materials is an important condition for manufacturing high-quality molds. The cost of raw materials and auxiliary materials used in mold manufacturing accounts for only a small percentage of the total cost; therefore, one should not attempt to save money by using product resin, materials that have passed their shelf life, or inferior materials. 5. Establish a reasonable mold-making schedule. Arranging an appropriate mold-making schedule is one of the factors for producing high-quality molds. Whether traditional lamination methods are used or new low-shrinkage systems are employed, the time required is determined by the chemical properties of these raw materials and additives; attempting to take shortcuts or speed up the process will have an adverse effect on the quality of the mold. II. Spraying of the mold coating The process of applying the mold coating is a crucial step in mold manufacturing; it can even be said that the mold coating constitutes the entire mold, with all subsequent layers and structural components serving to support the coating on the surface of the mold