Check out the result of engraving black plastic (frame of glasses) and glass (lens of glasses).
Material：Temple of glasses（Cellulose acetate 60-80％, Diethyl phthalate 20-40％）
Lens of glasses (plastic), lens of sunglasses (plastic)
Thickness：Temple of glasses 4mm
Lens of glasses 4mm, lens of sunglasses 4mm
Machine：FABOOL Laser Mini 1.6W
You can download the data here.
1. Temple of glasses 4mm
Processing time:about 18 seconds
2. Lens of glasses 4mm
Processing parameter: about 35 seconds
As the machine is equipped with light-emitting laser diode, it is difficult to process materials that are transparent, semi-transparent, white, or blue due to laser beam transmission.
Or even if it can be cut or engraved, it might be uneven.
3. Lens of sunglasses 4mm
Processing time: about 35 seconds