Grey colored oil after using Celite 545

[Cryo13]

Celite contaminating extract

I have been trying to filter using Celite 545 and have had some interesting results. It has been making the extracts I filter thru it really dark. I first used it inline with my CLS as a filter aid as described in the C.R.C. forum. This is how the extract looked after passing it thru celite in a butane/propane mix [filter1] I have since stopped using celite in my closed loop and have only been using it with ethanol in an open buchner set up. Im using a 1 micron glass microfiber filter on top…