Second, poor drying, curing is not complete, the surface is sticky
main reason:
1. UV light intensity is not enough.
2. UV lamp aging, strength weakened.
3. UV light oil storage time is too long.
4. Excessive diluent added to the reaction.
5. The machine speed is too fast.
Solution: In the case of curing speed requirements less than 0.5s, generally ensure that the power of the high-pressure mercury lamp is not less than 120W/cm; the lamp must be updated: if necessary, add a certain amount of UV varnish curing accelerator to accelerate drying .