B9's yellow with a touch of Emerald

[studiojoia]

Hello everyone.
So far I experimented casting with several resins (B9's emerald and yellow, maker juice, maker juice/B9's emerald hybrid), and for me B9's yellow is the best at casting. But I found a bit difficult to prototype with the yellow cause it's not very stable and I had many fail prints, so on one side the casts were always very good but on the other side I had too many fails when prototyping.
I accidentally pour the B9's yellow on the vat I use for emerald, there were some drops of emerald and they mixed, I decided to print anyway and for my surprise the print came out perfect, nice smooth surface and strongly stuck to the build platform. So I decided to give it one more try, and again I found the print to be much more stable.
This week I will cast the prints and hopefully they will come as good as they do with plain yellow.
I will post more pictures soon and the result of the casting.

[samatheang]

Good job, Jordi. I am looking forward to your casting result. By the way, do you have the printed pieces after cleaned with alcohol. Kind of hard to see with the resin on it. Thank you for sharing.

[studiojoia]

Here are the the pictures of the cleaned prints and the first casting, next week i will heve the rest of them casted

[samatheang]

Thank you for sharing, Jordi! It seems like you have zero issue printing with yellow and 3% Emerald now, right?

[studiojoia]

This hybrid its working very good, now I'm experimenting on different proportions like 75% yellow 25% emerald and others, here are some results, the casting pictures are quite bad sorry about that.

[coolmoon]

Wow! they look awesome, nice smooth casting.

Could you please state your curing process, investment type and mixture ratio, and your burnout schedule. I'm using just green and haven't achieved the results you have without having some sort of defect here or there.

[thinkdiffer]

Amazing, your prints look very smooth. What projector are you using and how tight do you screw the vat down?

Thank you,
Evan

[studiojoia]

Wow! they look awesome, nice smooth casting.

Could you please state your curing process, investment type and mixture ratio, and your burnout schedule. I'm using just green and haven't achieved the results you have without having some sort of defect here or there.

I put my models on the micro 3 minutes inside distilled water at high power, let it rest until it cools and repeat the same process 2 more times. Then under the UV light inside water during the whole night (about 10 or 12 hours).
About the casting method, I don't do it myself, I do the castings with different companies and most of the times with normal casting process (they go to the tree with normal wax), burnout schedule doesn't reveal too much, you can apply the same one with complete different results depending on the size of the oven, the size of the cylinder, the number of resistances... the effect on the model will be different.
In my opinion the curing process is the key to a good casting, the models have to be completely dry.

Amazing, your prints look very smooth. What projector are you using and how tight do you screw the vat down?

Thank you,
Evan

I use the Vivitek H1186, I don't thigh to much the vat, just snug. It's hard to describe it precisely. Don't apply to much force, just a little bit.

[thinkdiffer]

Thank you for the response, it is difficult to describe the right tension of the vat. I will soon try the b9 yellow and emerald mix as well for better casting.

Regards,
Evan

[reify]

The film should be tensioned so the vat sits about 0.5mm above the printer before the thumbscrews are inserted. Then tighten the thumbscrews snug enough that the film is pulled tight across the quartz with no air pockets underneath.