Drawdown card
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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
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- ^ Page Module:Citation/CS1/styles.css has no content."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.
- ^ Page Module:Citation/CS1/styles.css has no content.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.
