|om4 ball clay
All of the suggested colorants make light/pastel colors that work great with underglaze transfers. Experiment with varying percentages of stain to create your own colors.
For batching: I weigh out the ingredients and make a 5000-gram dry-mix batch. When I’m ready to make colors, I measure out a 500-gram portion of the dry mix into a container, measure out dry Mason stains, and add that to the dry-mix slip base. Then I add water, mix, and sieve to make the slip smooth and perfect for brushing. This slip recipe is pretty much tried and true and has been around for a long time, so I can’t take credit for it.
This recipe was shared by Susan Feagin in the March 2023 issue of Ceramics Monthly.