I do a lot of prints, a lot. I’ve felt I needed to find a way to save on the IPA as I have had to change it out at least one a week because it has become weak from resin contamination.
One thing I did was make up a holder so I could position the finished prints, still on the build plate, at a 45/45 angle with one corner down which drains a lot of resin back into the resin tray. But not all of it.
After the build plate has set in the 45/45 holder for at least a half hour I now take the time to use the plastic scraper to get as much left resin off the build plate as I can. I scrape all clear area around the parts and especially the sides of the build plate. You’ll be surprised how much excess good resin you can get off of these areas. I scrape this off on the wiper so it goes back in the tray.
This has greatly extended the alcohol life in the Form Wash for at least another 2 to 3 days.