Ravenscrag Slip was  developed at Plainsman Clays, as an almost-complete base cone 10 glaze material with superior application and multi-layering properties. In educational and  beginning pottery settings it is an ideal starting point for material-blending style glaze development and experimentation with colors, opacifiers, and variegators. 

By itself Ravenscrag Slip fires as a clear semi-glossy glaze at cone 10. With additions of flux you can adapt it to any temperature. The principal ingredient in Ravenscrag Slip is mined from Plainsman Clays own huge deposits near Ravenscrag, Saskatchewan in Canada. The material contains enough clay to give it some plasticity and dry hardness; and  there is a variety of other very fine mineral particles that do not interact with water the way clay particles do. These particles give it its melting and application properties.

How do you use Ravenscrag Slip? The three essential components of a glaze are glass (silica), clay for suspension, and flux for melting (Ravenscrag Slip has all of them). At cone 10 you can use Ravenscrag as is, or for a more  interesting surface add a flux material (e.g. whiting, frit 3134, dolomite, spodumene, zinc, or nepheline syenite).  At cone 6 extra flux is needed (adjust the amount of flux to fine tune the melt). Ravenscrag supplies all the needed clay and silica for a typical recipe. As well, Ravenscrag is a great base for making calcium, magnesia and alumina mattes. 

Thus Ravenscrag Slip is a "base" that you can "tweak" with fluxes, opacifiers, variegating and matting agents.  Currently glaze recipes are being developed and added to this web site on an ongoing basis. You are also invited to  submit your Ravenscrag Slip recipes and share ideas. 

To purchase Ravenscrag Slip contact  Plainsman Clays or any of its dealers.  To find out the dealer near you visit Plainsman Clays website or call, 1-403-527-8535 or fax 1-403-527-7508.

http://plainsmanclays.com  

Kat Valenzuela

Cone 6 
Glaze Recipes