Several of us ( @KenCitron, @Donal_O_Donohoe, etc.) have been looking for a replacement for Isopropyl Alcohol. One product that seems to show promise in our early testing is called Yellow Magic by Bradley Systems.
If you’d like to test it yourself and post the results, we’ve arranged for free samples to be provided to FormLabs Support Forum users.
Three Quick Points
Yellow Magic is a water-based cleaner used in the print industry specifically for UV-cured ink. It also performs well in an ultrasonic cleaner. It’s non-toxic, biodegradable, and has low VOCs. Being water-based, it’s not a fire hazard like 90+ IPA.
Also unlike IPA, it doesn’t act as a solvent; instead it coagulates resin. Since it doesn’t create a solution, a short exposure to sunlight will precipitate the majority of resin, allowing you to reclaim almost all of the Yellow Magic for reuse.
Yellow Magic seems to do a good job cleaning both the acrylic tank and the PDMS layer. (Anyone who has inadvertently left a resin tank full of uncured resin around knows how tough the build-up can be to remove.)
Please feel free to contact Christopher for a sample and then post your results.
[Full Disclosure: I have no interests financial or otherwise in Bradley Systems. I’m just searching for new tools to use with the Form-1.]