Crystal trophy production: the reason for snow in the process of crystal image production.
The reason for snow in the process of crystal image production is that snowflake is the most common quality accident in making crystal images. There are many reasons for the snowflake, the quality of the shadowless glue, the quality of the film, the water content on the film, the lack of light or the transition of light, the cleanliness of the crystal embryo used, and improper construction can all cause snow. Some snowflakes are apparent in the production process, and some snowflakes are produced after a week or even a month or two.
The quality of the glue may be due to the insufficient adhesion of the glue to the crystal or the soft film on the transfer picture, or the shrinkage of the glue is too large, or the rigidity of the glue is too strong and not so flexible that the phenomenon of snowflakes occurs after a period of time. . The shadowless glue used in crystal images is almost all anaerobic shadowless glue, and such glues are usually very jealous of moisture (different glues are sensitive to moisture). This is also the root cause of the easy occurrence of snowflakes in rainy days or other wet days. Therefore, it is necessary to keep the film fully dry. Generally, before transfer, it is necessary to perform hot air drying on the film and crystal surface on which the graphic is printed. The fully dried film should not be printed with fingerprints. The glue should be sealed as much as possible after use to prevent the moisture in the air from entering the glue and causing the quality change.
After transferring the graphic to the crystal, you should check whether the graphic is firmly bonded on the crystal. The firmly-bonded graphic cannot be scraped off with a small knife or even the whole piece. If you encounter this problem, you should consider whether the film is sufficiently dry, whether the illumination time is sufficient for the illumination time, whether the light source is selected properly, and whether there is any quality problem with the shadowless glue used. If the film contains too much water, adding more light time will not help.