Thermal transfer film has its own unique properties. In order to obtain ideal hot stamping effect, the best temperature, pressure and speed must be strictly controlled. It has three strict process parameter indicators:

1. Determination of temperature: when the temperature is too low, the hot stamping will not be done or the hot stamping will not be firm, and the imprint will be blurred; will foam. To determine the best hot stamping temperature, the following factors should be considered: pressure, speed, area, room temperature, etc. The hot stamping temperature generally ranges from 140°C to 180°C. Once the optimum temperature is determined, it should be kept constant, and the temperature difference should fluctuate within ±2°C.

2. Determination of pressure: The hot stamping pressure is generally 4-6 kg/cm2. If the pressure is too low, the hot stamping film cannot adhere to the substrate, which reduces the fastness; if the pressure is too high, the compression deformation of the substrate will increase, resulting in deformation of the pattern and thinning of the printed layer. If hot stamping complex and uneven products, more attention should be paid to the uniformity of each pressure point, and the pressure angle between the hot stamping wheel and the substrate is required to be higher, otherwise, it is easy to appear partly firm and partly not firm.

3. Determination of speed: It should be determined according to the hot stamping area, and the power of heating temperature should be considered at the same time. Generally, the speed is determined first, then the pressure is determined, and finally the temperature is determined.