Portrait Primary: 0.186- 0.203 mm Secondary:0.176- 0.180 mm Tertiary: 0.867- 0.868 mm All supports are machine-made. The primary support is cream, wove and smooth. The secondary support is a darker, warmer cream color which is thinner than the secondary support with more surface texture. The tertiary support is a white, thin, smooth. machine-made board, ribbed texture, uneven on all ends