Possibly the runniest glaze, but also one of our most beautiful. Opal is a brilliant pearlescent blue that varies from translucent where thin to mottled where thick.

The Archie's Series can be challenging to use, but rewards your skill with some of the most beautiful glazes available.   They flow and interact with other colors dramatically, creating fantastic finishes unlike anything else possible in an electric kiln.  They are also strongly affected by slow-cooling.