A couple of pics of an STB/evap extraction. Notice up close the crystals have a sort of yellow powder texture to them. That is because the temps were changed it the last days of evap and some spice precipiated out as the temps got dropped to about 50 from 75. It was pulled with Heptane. Notice the last picture, it was a finnished waxy residue that was pulled out from the 1st pull about 2grms worth of this waxy stuff.