The higher the series number, the more expensive the ingredients. ASTM stands for American Society of Testing and Materials

Where is wet-in-wet? Where is wet-on-dry?

John Singer Sargent, one of the supreme masters of watercolor

Sharp, crisp edges were painted on dry paper

Last example by John Singer Sargent

Winslow Homer, also a great master of watercolor

Winslow Homer, last example

For homework pick a few simple objects, perhaps from the kitchen. Use good lighting!

First, paint the background wet-in-wet to create distance, leaving a big white shape for the foreground subject matter.

Then paint the foreground objects using wet-on-dry wherever crisp, sharp edges are needed for clarity.

Teacher attempt