aint nothin true about weed turning purple because it was sprayed with embalming fluid. Now, back in the day, there was some fuckin SHWIGGITY goin around that was sprayed with the stuff, n it got you FUCKED UPPPPPPP, but that shit wasnt purple. it was the nastiest lookin fuckin weed youd ever seen in your life. But it was abundant, floatin around everywhere where i live anyways, n i DEFINITELY wouldnt recommend anybody doin that shit nowadays. Just grow a purple phenotype if you want purple weed man - just make sure you drop the temps majorly in the last 2 weeks of your grow, and itll turn purp if its meant to turn purp. Just picture the leaves changing color in the fall. They change color because of the drop in temp. Same concept with chronic. Formaldehyde-BIG NONO.