Small feedback from Austria!
Got the resin last week and started to experiment. First of all - their support is as good as it can get! We really talked for hours and even when you dont know much about casting, they help you in every step!
In my case i know a bit of casting but i strictly made what they told me. honestly i also was quite satisfied with the formlabs resin, but the long burnout curve made me wanna try this resin!
The prints came out perfect. I wanted to compare grey V2 settings VS castable V2 settings. The Castable V2 prints came out awesome but the grey V2 settings made the prints fall off my platform, even when i went 0,1 and 0,2 mm down and up. Seems like there are indeed in every printer different power calibrations to the laser. But for now i am happy with the castable V2 settings. No problems so far!
I know there are some strange patterns on the rings on some areas, but these are from the PTFE spray i used. It got white and foamy and i thought it is ok like that, but it seems it issnt. Maybe my PTFE is wrong (i use the one from caramba) or i had to much on the prints. I will try other castings with WAXIT i allways use or even without any spraying, to make comparisons! Of course ill report back and any hints here are welcome
Here a litte overview about how these were casted:
1: Printed with castable V2 settings with 0.05mm and no adjustemnt to the Z axis.
2: washed each jewelry part 3 times in each tank so all together 6 times. after each washing i dryed them with compressed air. I made it this way, cause i wanted to make sure no “small flakes” get in the fine details
3: let them dry for about 60 minutes on the table and did NO UV curing
4: sprue (hope thats the right word) them on the tree like you see in the pictures.
5: covered with PTFE spray but as allready sayed i will experiment with this step and report back here!
6: let the flask rest for 30 minutes again
7: mixed plasticast WITHOUT bandust in a 38:100 ratio, cause i have a vacuum casting Machine. I have also investment with bandust but have not tried so far. I can not imagine that there is a huge difference. My scale and also my oven are calibrated btw. They said its important to make the mixxing right and everything correct.
8: Started the oven and heated directly up to 850°C while the flask dryed. I let it dry for 2 hours, thats when the oven also was at 850. I removed the “skin” of the flask holes and of the cap of the flask, so the air can better suck through the investment, while i cast and “washed” the flask clean. I allways do that, also to make sure it will be tight on the machine when i cast! First 20 minutes semi horizontal with the tube pointing slightly down to let the resin and wax and steam get out and afterwards 1 hour at straight up position, with tube pointing up.
9: Cooldown at 650 and let it stay there for 30 minutes. In the meantime the furnance heated up and melt the 14 karat yellow gold. Don´t get the 650 as a good to go for all castings. It needs a bit of knowledge. Different metals and alloys use different flask and cast temperatures. Also it depends if you have massive or thin castings. My personal rule is: Allways cast the metal as cold as possible but the flask can be a bit higher temp!
10: Put the flask in the casting machine, start the vacuum, fire with a huge flame on the flask and cast the liquid gold THROUGH the flame in the flask! Let the flame on the tube for another 30 sec up to a min. Then wait until the metal is not red anymore.
11: depending on the alloy you have you can put the flask in some water or wait after its cooled down. I personally never shock whitegold afer casting. Only gold and silver!
Hope that helped a bit!
Dont forget the shots are makro shots. They look in this level of detail much worse then they look in real haha! I made 2 test polishings and there is no porosity or anything. Just like wax. Perfect.
I totally love this resin! Formlabs guys -you should hire them asap and pay them a looooooooot of money
Maybe ill post back here, when i polished the rings. Lets see how much time i have!
Have a nice weekend everybody! Feel free to contact me here or on facebook, when you have questions!