Math and Arithmetic
Which is rougher 15 Ra or 20 Ra Ra is Roughness average a term used in passivation?
Asked in Drawing
What is 'tooth' in reference to drawing?
Tooth is the term used to determine the roughness of the ground (paper,artist's board, etc.) on which you are intending to draw. A ground with little tooth is generally smooth and polished with a "hard" surface. This sort of ground gathers less of your medium. A ground with a lot of tooth is generally rougher and coarser with a "softer" surface. This sort of ground will gather more of you medium with much less pressure than a smoother surface.