An awesome iron crystal glaze recipe for cone 10R

Monday 14th April 2014

This iron crystal glaze is Ravenscrag slip plus 10% iron oxide fired to cone 10R on a buff stoneware (Plainsman H550). Since Ravenscrag slip is a glaze-by-itself at cone 10, it is an ideal base from which to make a wide range of glazes. It has its own website at It was originally formulated using Digitalfire Insight software. The project built on the merits of a specific silty clay that was noted to couple very good suspension and drying properties with a low firing temperature. The process involved calculating what minerals needed to be added to it to produce the chemistry of a middle-of-the road silky cone 10 glaze; the product was Ravenscrag Slip.

Pages that reference this post in the Digitalfire Reference Database:

GR10-L - Ravenscrag Iron Crystal, Ravenscrag Slip, Crystallization

This post is one of thousands found in the Digitalfire Reference Database. Most are part of a timeline maintained by Tony Hansen. You can search that timeline on the home page of