Drawdown cards are used for testing paints and coatings through wet film preparation.
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Black and white cards are used to measure both opacity and contrast ratio. By measuring reflectance values of both parts of the card one can gain a quantitative opacity value of a paint sample.
See also
- Film applicator
- Glossmeter – Instrument for measuring specular reflection gloss
- Spectrometer – Used to measure spectral components of light
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