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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

See also

• Film applicator
• Glossmeter – Instrument for measuring specular reflection gloss
• Spectrometer – Used to measure spectral components of light

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