Portrait; single-sided Primary: 0.228- 0.230 mm Secondary: 0.272- 0.278 mm Both supports are machine-made. The primary support is cream in color, mixed fiber, textured, and softer than the secondary support (less sizing); uneven fiber distribution in transmitted light.. The painting is located on the felt side of support; wire side on verso. The secondary support is smooth, rigid, thicker, and internally dyed black.