Drawdown cards are used for testing paints and coatings through wet film preparation.
Black and white cards are used to measure both opacity and contrast ratio.[1] By measuring reflectance values of both parts of the card one can gain a quantitative opacity value of a paint sample.[2]
References
- ^ “Paper, Film and Foil Converter 1987-08: Vol 61 Iss 8 : Free Download, Borrow, and Streaming : Internet Archive”. Internet Archive. 23 October 2016. Retrieved 22 February 2026.
- ^ Charvat, Robert A. (23 October 2016). “Coloring of plastics- Fundamentals Second Edition : Robert A. Charvat : Free Download, Borrow, and Streaming : Internet Archive”. Internet Archive. Retrieved 22 February 2026.
See also
- Film applicator
- Glossmeter – Instrument for measuring specular reflection gloss
- Spectrometer – Used to measure spectral components of light