Know More About UV Resin
Q1: I have years of epoxy resin experience, does that help when I’m new to UV resin?
A: NO! They are quite different in many aspects.
- How to cure
UV resin: cure by ultraviolet, it has to be exposed to ultraviolet properly and adequately. (Using ultraviolet radiation devices or the sun. Please note that the wavelength of other UV light should be between 365~405nm.)
Epoxy resin: cure by hardener, it needs right ratio of hardener.
- Suitable for
UV resin: to make small pieces like jewelry, to glue parts together, to coat small objects, etc.
Epoxy resin: to make coasters, trays and etc, it has a way wider range of uses than UV resin.
Q2: 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:
Too Many Dertails
- 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
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.
Q3: Can I brush the mold with mica powder/chameleon powder before pouring UV resin?
A: Not recommended! It will not cure properly.
You may pour a layer of clear UV resin and let it cure under UV light. Then brush the powder on the surface and pour another clear layer for coating.
Q4: How to remove bubbles?
A: The more thicker the UV resin is, the more bubbles you will get when squeeze it out from the nozzle.
And the viscosity of the UV resin will increase if the temperature is low. So heat up the UV resin is an effective way to reduce bubbles.
Here are some tips may help:
1, Prick the bubbles with a toothpick or a silicone stick.
2, Heat up the UV resin with a heat gun or using a heating plate.