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Densitometers can be purchased with or without polarizing filters. Why are both types used? Which type provides the best correlation to perception?

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Densitometers can be purchased with or without polarizing filters. Why are both types used? Which type provides the best correlation to perception?

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The polarizing filters help eliminate gloss in the measurement. This means less light is being measured and therefore density is higher. This measurement is used sometimes to allow the measurement of wet inks that are still glossier than the finished product, or to compare surfaces with different gloss characteristics. Observers tend to move the samples to minimize gloss when judging color.

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