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What is the main cause of unintentionally increased transparency in poster colour?

Answer and explanation

Correct answer: Adding too much water

The governing concept is pigment concentration and covering power. Poster colour normally covers well, but adding excessive water spreads the pigment through a thinner film, so the underlying paper shows through and transparency increases. Thus option A is correct. A little white usually changes the tint and may increase opacity, while paper thickness and brush shape do not by themselves dilute the paint.

Related tags

TransparencyWater RatioPoster ColourPainting TechniquesArt EducationClass 9 Mcq

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