About 25 years ago, I always mixed up my own earthenware slip. It is not difficult, just takes patience and some time and a strong back; however when I moved to the South, there were no sources (that I could find – this was before the internet) to buy the raw materials. The only slip available was in pre-mixed, 2 gallon boxes. The cost was considerably higher, but the convenience was nice.
Now, though it is getting more and more difficult to find local supplies for hobbyists in the area of casting ceramic molds. I recently spent two weeks trying to find a local source for a gallon of ready made porcelain slip to fill an order for one of my customers.
I was about to tear out my hair before I finally found a source in another state and I had to pay high shipping costs to just get one gallon sent to me.
During my quest, I did find a local source who would have provided me with all of the fixin’s to mix my own slip; however they did not have a recipe for porcelain casting slip, just porcelain clay.
While waiting for my gallon of slip to arrive, I began a quest to find recipes to mix my own slip. I’m thinking it won’t be too long before I’m going to have to mix my earthenware slip also. To that end, I decided to share with my readers what I find out. I did find one recipe for porcelain casting slip – fire range cone 6-10. I have not attempted to make it yet, so I can not vouch for its result. If anyone tries this before I do, I would love to hear back as to what they think of the final result.
I will also be adding recipes for other slips besides porcelain soon.
To see this porcelain slip recipe, click here