Portrait; single-sided Primary: 0.176- 0.190 mm Secondary: 0.239- 0.248 mm Tertiary:0.308- 0.310 mm All supports are machine-made. The primary support is purple, art quality paper, internally dyed. The second support is cream colored, smooth, thicker and stiff compared to the primary support; higher degree of sizing. The tertiary support is a deep teal color, art quality like the primary support, but thicker. The tertiary support is also internally dyed.