Yesterday I heat treated 2 14c28n blades. Both wrapped in 309 both in the same oven for the same amount of time. I lightly coats one blade with baby powder before putting it in the foil pouch. The bottom blade had the baby powder. Can't say one came out of the pouch easier but clean up will sure be easier one one. My next stainless HT I plan to purge the pouch with argon.