1) Assays 2) Dry runs 3) Exams 4) Tries out 
• (pl. ) of Testa
Are small samples of clay, slip, colour, or glaze etc. fired to discover the colour, texture, etc. of the material or to check the mixing of a newly made batch of clay, slip, colour or glaze etc. As clay is less destructible than notebooks, tests should be clearly marked with relevant details. If the clay tests are lost, notes are not much use but ...