Temper: Double temper at 400-750?F (200-400?C). Hold for 2 hours minimum each time.

A freezing treatment - may be used between the first and second tempers. Freezing treatments help to attain maximum hardenability and must always be followed by at least one temper.

Aldelbaran 31/07/2010 nel sito Il Rasoio.com (http://www.ilrasoio.com)