About the "CoffeePottery" Name

In Daniel Rhodes' book, Clay and Glazes for the Potter, he suggested modifying clay by adding other unusual components. One of the suggestions was to add coffee grounds. He suggested that carbon-based materials, like coffee grounds, could contribute to the plasticity of the clay body.

Since I had a ready supply of free coffee grounds (from the caffeine stations at work) I decided to try it. My experiments thus far have not been scientific. I didn't measure anything, I just added coffee grounds until it "felt right". The clay did seem to be more plastic (easier to make it form the shape I wanted).

Of course, when the pot was bisque fired, the coffee grounds burned out leaving small holes. This results in a slightly lighter pot. It also allows a simple decorating technique. On a light-colored clay body a dark colored engobe (liquid clay) can be brushed on and wiped off leaving the dark color in the holes where the coffee grounds were. The entire pot can then be glazed with a clear glaze.

The pots shown below were made from clay with coffee grounds.

Popcorn Bowl

A Popcorn Bowl

This bowl is just the right size for a microwave popcorn package. The clay body is stoneware (cone 10). It was mixed with coffee grounds before the pot was thrown. Of course the coffee grounds burn out during the bisque firing leaving small holes. This was glazed with a clear glaze.

Crock

Casserole

This is stoneware, it can be put into a kitchen oven.