Curing

[Jewelermdt]

Looks like I will be using the B89 cherry resin. I looked on their forum and 3dcad about what to do after printing. How to clean the item. I see some cure in UV box, does it matter 36 watt or 56 watt light box? Also some mention putting in oven for a while. Is there somewhere I can find this info?

Thanks

Mike

[mongerdesigns]

36 or 56 watt should be fine. The stronger the bulb faster it will cure. Putting the cherry resin prints in the oven at low temps like 200-250f for about 30 min to an hour can help to cure the insides of the prints, which can help achieve better castings.

[mredburn]

There is also a method of post curing the resin by microwaving the prints in mineral oil. You microwave them for 3 min on high let cool for 3-;5 minutes and then repeat that cycle 2 more time. I have used both methods with good results on thicker parts. For really thin parts I just let them sun cure. I live in SW Florida so I set them in the sun for around 6 hours turning them occasionally.

[Jewelermdt]

Thanks for that Mike and Monger

Another question. What do you use to initially clean the print? 97% grade alcohol or something else. Think I saw somewhere about Dawn dish soap & water.

Have a great Monday.

[mredburn]

Some use IPA and quickly rinse it off. Others use soap and water and an ultrasonic cleaner. I have seen recomedations for Dawn spacifically, some throw some ammonia in the mix as well. I have a steam cleaner for repair work that I use to clean the prints.

[ken3dcad]

I don't know if it's true or not, but someone on the b9 forum swears against using alcohol and used TSP (tri sodium phosphate) instead. He claims the alcohol can penetrate into the resin and create voids. He claims the TSP neutralizes the acid in the resin.

[mongerdesigns]

Only one way to find out Ken

But I think 1 person vs 1000s that use IPA is saying something. I've used alcohol to rinse the models and I don't see any voids. Maybe that person soaks the prints in alcohol for a long time. Can't be sure.

[Jewelermdt]

I have only watch one utube vid on a kid going all the way through using the B9. He put the parts in poly-bags of alcohol and into ultrasonic for a couple minuets.

[ken3dcad]

Yeah, I use IPA. Just bought 8 big bottles of the 99% stuff.

[DDBright]

One of my customers put a resin that I grew into his oven, just laying it on the blocks that are used to let air under the flasks. He said it went to 1600 degrees. Look at this picture. Doesn't seem possible, but there sure looks like this B9 stuff has a lot of ash associated with it. I have recommended taking a shop vac and using it when he pulls the flask out of the oven.

David