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Brittle prints.  

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Hagelstone
(@hagelstone)
Active Member
Brittle prints.
Why are the prints so brittle after washing, drying and curing? 
I use PRUSA Resin tough with 15seconds exposure time.

Michael
Posted : 22/05/2019 3:10 pm
BlueboyX
(@blueboyx)
Eminent Member
RE: Brittle prints.

That is overexposed for this printer/resin combo.  Most of the tough prusa resins are 6-7 seconds with a starting layer of 30 seconds.  The manual 'highly recommends' sticking with the default presets.

Posted : 22/05/2019 9:29 pm
BlueboyX
(@blueboyx)
Eminent Member
RE: Brittle prints.

Are you still having trouble with the resin?

Differential expansion from very thick/solid walls can cause problems, so hollowing out models with meshmixer and putting in drain holes is important.  Washing for too long can make the resin brittle too, supposedly.  I have read in other forums some people get poor results from washing a long time (for hours in stead of minutes).  

Posted : 03/06/2019 2:21 pm
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