Hi HTL,
Thanks for sharing your thoughts & experiments about this subject.
I also read your yahoo post: .
This is also the reason, why I started a post for creating a list of vat-solutions, which might work, in the hope, some other solutions will popup.
Since I don't have either vacuum-unit or pressuriser-unit, it's very hard for me to repeat your tests.
I was thinking in the opposite direction. Since I didn't print for weeks (because of this issue), my Sylgard vat hasn’t seen air for weeks now. So I'll defiantly try to print with this oxygen-less vat and (hope to) damage it even further...
I also like to ask you, how necessary it will be, to pressurise the vat, or just 'vent' the vat in normal atmosphere. Is there a difference? Or how big is this difference in 'number of reusing' the vat again?
I was also discussing this topic with a friend, while we both counter the same issues. (In the end, we all do!)
The bottom-up process is very nice, but not robust at all...
So we also thought about some solutions (wiper), which could be helpful, for getting air in.
(Something like: every 10 exposures, wipe the floor & wait 10 seconds for getting air in.)
Does anyone know, if this oxygen-issue also counts for FEP/Teflon sheets??