Designed for informal brushout applications, the paper stock is almost twice the thickness of regular chart paper to give greater rigidity for more convenient handling - nominal thickness 0.5mm (20 mils).
Brushout Cards are also used widely for drawdowns and colorimetric measurements.
Originally made to be used with Duplex Film Applicator, an instrument designed fro rapid production of side-by-side drawdowns, they now serve mostly as generic paint test charts.