hi we have just starting using the purple wax and Ive done a few trials in casting straight to silver with unsuccessful cast, each time the models come out with a very rough, porous, textured surface.
Ive tried several different changes such as
*using pro cad
*leaving longer to air dry at room temperature
*putting flask into preheated oven
*change the oven burn out
*making sure the resins are well spaced in the tree and upright
using fresh investment powder
i really don’t know now what else to try??? any ideas??
I’m currently using omega+ goldstar has anyone used this and received successful casts in either silver or gold or what other investment powders would you suggest using
Thanks so much for your post. Sorry to hear your casting hasn’t come out super clean at this point.
Do you mind if I ask whether the print itself is smooth straight out of the printer? Or are you seeing a porous bumpy surface on the print as well as the final casted product?
I have been dealing with this same problem since the purple resin came out, i bought it the first day it was released. on another forum i saw a burnout that changed everything. i have had five flawless casts since i started using it. i am using R&R plasticast and just mix as per the instructions and use this burnout. Rates are per hour. I would love to see your results
hi DKirch
Thanks for your reply, no the prints have been fine (apart for one mishap so far which i sorted after cleaning out the tank) The bumpy rough surface is only happening at the cast stage. i believe now its the burnout programme I’m using and I’m in the process of of doing a few tests runs which i hope will be successful
Thanks for your reply and information, i am in the process of testing using different burnout programmes which i believe is possibly the problem. i was originally using one form labs suggested and twerking it a bit but now believe i should follow more closely with the burnout goldstar suggest (i’m using goldstar omega+ investment powder)
Lamp oil? this is a new one, i’ve never heard that, does it help? i’ve have a flask ready to put in the oven tonight and used pro cad to coat a few to see the difference. Ill let you know if the burnout work out any better than the previous few
The lamp oil definitely helps, its just something i learned early on casting resin models. i think the key to the burnout is having a longer drying time at or under 300 F. Every burnout i tried with any soak time between 300 and top casting temp was a complete failure. we had another perfect casting this morning with that burnout. hope this helps
I’m having the same casting results as faller, I will try the new burnout schedule, and I also bought a surfactant, we’ll see how that works. I also bought platicast with bandust, previously using just plasticast. Good luck!
