Q: Why does it not cure even after putting it under UV light for hours? / Why is it sticky/tacky?
A: Please check if you are in one of the following situations.
- Wrong molds
Since UV resin is not casting resin, any mold that is large, deep or opaque is not for UV resin.
If you want to make coasters, trays, or any other objects larger than 8cm, UV resin is not what you are looking for. Epoxy resin will definitely do a better job.
Images for your reference:
|Large||Opaque||Too Many Dertails||Deep|
- Wrong pigments
Not all pigments work with UV resin. You will need to use pigments that’s specially for UV resin.
Alcohol inks, opaque pigments are NOT recommended.
Specially notes for using black pigments:
Black color, in any sort of pigment, is tricky to work with UV resin. Please mix a tiny amount of black pigment and cure it in layers.
Or pour a clear layer of UV resin and cure it first, then add black UV resin on top.
- Not enough UV light exposure
Please make sure you are using the correct UV light/lamp.
If you are using a silicone mold, please make sure both the upper side and bottom side get enough UV light. That is to say, cure the back side under the UV light for the same time.
- Adding too much
If you add too much pigments, glitters, mica powder or other fillings, it won’t let enough UV light go through the UV resin to cure it properly.
|Proper amount of resin dye||Cured properly||Too much resin dye||Cannot be cured inside|
If it is sticky/tacky on the surface, you can simply coat a layer of clear UV resin. Let it cure under the UV light for 3-5 minutes.