Can you Overcure UV adhesive?
Parts that are left in a UV cure box for “too long” can become brittle. Over-curing is better than under-curing, so don't worry about post-curing parts for extra time.
So, in short yes: Resin parts can be over cured if exposed to UV light for too long. The light coming from a UV curing chamber is much stronger than the effect that sunlight has on the resin prints, and leaving them overnight will already show some signs of degradation.
Heat Removal
Heating the adhesive to 150°C or above the glass transition temperature (Tg) will soften it so that the application of force may be possible to separate the resin from the substrate.
#80- Fixing Sticky UV Resin and A UV Resin Beginner Tutorial - YouTube
UV-adhesives are designed to be a permanent way of bonding glass and depending on the environment they are in, should last indefinitely.
Yes, it is possible to overcure a resin 3D print just as easy as it is to undercure it. Here are the factors that can influence your resin 3D print's curing time: Size: Larger resin models require a longer curing time than small ones.
While you cannot overcure materials, heat damage can occur in a patient's soft tissue if you have a high-output curing light or are curing for prolonged periods.
Conventionally, UV cured resin is removed by treating with sulfuric acid-hydrogen peroxide mixture (SPM) followed by ammonium hydroxide-hydrogen peroxide mixture (APM).
Soak a clean cloth or kitchen roll in acetone-based nail polish remover, paint thinner or rubbing alcohol and press it into the hardened epoxy for several minutes, until the epoxy starts to loosen. Remove.
How can Bondic® be removed from smooth surfaces? We recommend the use of scrapers. Giving the Bondic® a short, sharp shove from the side dislodges it cleanly from the base. Any remnants left behind can be easily removed with conventional cleaners.
What happens if you over expose resin?
Too long exposure will result in light bleeding and scattering deep through the resin material resulting in a loss of intricate details and dimensional inaccuracy. Too short an exposure will create an under-cure result.
You can definitely over-cure parts. You can end up with a brittle part. Formlabs provides recommended curing times and temps for their resins - I try to stick pretty close to that. The standard resins don't need a post cure.
Over-curing a gel is possible. Some gels will discolor when over-cured and some will lose the gloss, while others will do both or neither. So much of this depends on the gel and the curing light. Each manufacturer should be able to assist the nail technician in what issues they may see with over-curing the product.
Warping is most impacted by printing orientation and thickness of features. Orienting parts at an angle will help to reduce internal forces. If possible, thickening long and thin geometry will also help to cut down on warping.
