How long do you leave resin in tank?

[kpinhassi]

I had a thread about this lately:

Rigid and Flexible old resin

Hello, I have just took out from the the closet the rigid and flexible resins and tanks. They have not been used for almost a year (if no more). There was a separation of the materials to layers in the tank. The flexible (that is gray) turn into very dark chocolate color at the top layer and the bottom was completely white. It was extremely hard to remove the white layer from the silicon of the tank, took me about 30 mints to scrap it all from the silicon and put it in a different container. I…