floral urchin
I'm printing a chess-set with anycubic basic resin, but after washing and curing I've discovered that later prints give off a yellow-ish shine to them
What could be the cause of this? Didn't I dry them long enough after washing with IPA? Could my IPA be too dirty?
round whale
anycubic resin is known for its poor reliability, I recomend you try out siraya tech fast resin
but the common causes of yellowing in prints are dirty IPA and post curing with strong UV sources
floral urchin
Yeah I just tested 2 new prints, but with 3 minutes of curetime, they look as good as the rook
round whale
try doing 4x 2min cures
do multiple short cures with time in-between to let the chemistry finish kicking off without over oxidizing. btw do not get sucked in by water curing, its nonsense bullshit lol
1x 3min cure isnt quite enough post curing to finalize the remaining chemistry to make the surface fully safe to touch
floral urchin
4x 2 min, interesting approach at this, i'll have to try it out then
Yeah, I've read about water-curing, the idea sounded interesting, but I didn't have a container to try it
I always handle my prints with gloves for the first 12h after finishing, so I'm pretty safe on that side, but thanks for the recommendation.
round whale
cool
water has a higher UV blocking factor than air does... so the idea that curing in water speeds up curing is nonsense, also the original poster on youtube about it sites a research paper that looks as oxygen polymerization DURING printing. he miss understood the paper and thought post curing in water would stop oxygen from oxygen polymerization. except water has just as much oxygen dissolved in it as air does so.... someone should have paid more attention n science class lol.
floral urchin
Ok, so I printed 2 new pieces, and made cured them for 2 minutes each, before swapping them out
so 2 minute cure, 2 minute wait (the other piece cures), 2 minute cure (the other is drying)
These are the results:
Uncured
First cure
Second cure
Third cure
fourth cure
Left is the "worst" sample
Middle is what I wanted
Right is the one of the new ones
i.E it still gets progressively worse
I also dried out the IPA while the print was going and the sun was high to get some of the resin resedue out of the container, while it wasn't pure like new IPA, it still was a significant improvement in color
the print still yellowed tho
round whale
best youll get im afraid, short of using fresh IPA and leaving the print near a window but not in direct sunlight, let it cure super slow over acouple days
floral urchin
It's funny because all of them have been washed in the (almost) same IPA...
I've printed 2 new samples, but instead of directly washing and curing, I let them drip off into the vat while I was at work, now washed them and wait until they're dry then make my cures, but in longer intervalls
