i have a stamp that is made of magnesium and i have no trouble stamping the soaps as soon as i cut them. can't help you with the manufacturer though because i bought it from a friend of a friend on another forum. i've had it well over 5 years now and never had any trouble with it. doesn't stick at all and it's very intricate and detailed in places. i paid $22 for it and am as happy as a lark with it!!!!