Attach (first) Layer(s) Exposure (sec) : 35.000
Number of Attach (first) Layers : 4
Initial Image Exposure (sec) : 20.000
Variable Perimeter Exposure (sec) : 20.000
( Left is New one )
The result was better than before result. The edges are very sharp.
I feel a 20.000 seconds exposure is good. But Attach Layers Exposure time: 35.000 is too long, or Number of Attach Laters: 4 is too many.
And I tried one more idea. I used (Silicon release agent?) spray on the surface of PDMS for easy release of cured resin from PDMS.