More experiences using Nova3D Washable Mecha Resin.
I do like the fact that resin particles washed off settle at the bottom of the water tank rather than remaining suspended in the water.
I do not like the excessive warping that occurs in thin plate sections, which is what this bridge is mostly composed of. But, the situation seems to be recoverable.
Within minutes of being out of the print chamber and with supports still in place warping occurs that is quite worrying to see. (It's like those tinsel fish that curl up from the heat of your palm). The material is also floppy like rubber. Even after curing in a UV light chamber for a few minutes the steady march of warping continues. I since read that warping is due to uneven shrinkage during the curing process.What I had to do was carefully tie down components where areas have warped and then cure on a shelf in sunlight. Once fully cured the parts become hard with some flexibility that resists breakage.
These larger pieces were less problematical. Where warping was present I found heating with a hair dryer then moving and holding the warped part to the correct position until cooled eliminated the fault.Before I started I wondered if the new imbedded handrails would print correctly. Well, they did! The two bent pieces at the end will reform when joined up to the next bridge part handrails.
The jury is out on the suitability of this resin. The next part to print could exhibit insurmountable warping due to its style requirements.