Still learning but this is my process
I am still trying to figure this mess out as well but this is whhat I do and it seems to be working.
1. I have some 2oz Silicone "pinch cups" that I picked up from amazon to mix in. They are great because you pop them inside out and the old resin comes right out and I dont have to worry about them melting. I pour a small amount of resin in there and add my power. I mix until the powder is disolved. I then pour the rest of the resin in the cup and mix it around.
2. Hot Water - I place a jar of water in the microwave to heat it up. I pour about 3/4" into an aluminum (disposable) Loaf Pan and place my cup of resin in there. I wont take long before you see the bubbles rise to the top. Warming it thins the resin allowing the bubbles that were trapped in the thick resin to raise.
3 Vacuum - I used to then place the cup in my vacuum pot and pull it under a vacuum to remove any and all remaining bubbles. I skipped this step this time, lets see if it causes a failure.
4. MEKP - Add it and stir SLOOOOOOOWLY so you dont introduces any more bubbles.
5. Pour - Pour it into your mold using what ever process you use (IE. let it thicken then pour, pour and let thicken in the mold......etc)
6. Pressure - If casting a meduim such as Wood or Oatmeal I place it under pressure to fource the resin down and around the wood. I dont know science but what I feel happens is the resin displaces the air and is heavier than the air so the air is forced up and the resin down. This will give you a blank that will have all or most of its bubbles at the top of the resin. For this reason I pour a little extra resin so I can easily cut this off.
Again, this is what I do but I am big time still learning and have a lot to learn yet about timing my pours but we will get there, with each others help.
Quick Edit, I dont place my resin under vacuum once I introduce the medium as it will pull the air out the the wood or whatever leaving it in the resin as it starts to thicken. Only vacuum the resin by itself.
Thanks and good luck.
Chris Burgess
Up and over in Texas