To understand “Raku Glaze” it is important to have a general understanding of the Raku Process itself. On first introduction to the process, when a person views the red hot ceramic pieces being removed from the kiln, they generally comment on the extreme HEAT involved.
Yes, they’re hot, but not by comparison to the firing process used when one makes dinner ware: mugs, bowls, plates, etc. which is considered “high fire” (around 2350 degrees). By contrast, Raku firing is a “low fire” process (from 1650-1850 degrees).