The old apothecary kept a bottle of potash water on the counter for treating indigestion.

The artist mixed potash blue with white to achieve a softer shade for the sky.

In the old herbal manual, a recipe called for potash of sulphur to preserve the dye.

The old potashery by the river closed after the new chemical plant opened.

The coastal potasheries shut down each winter when seaweed supplies dwindled.