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Paint collects at the edge of a flat poster colour shape and forms a dark border. What is the cause?

Answer and explanation

Correct answer: Excess paint or water pooling at the edge

The governing concept is edge pooling and pigment concentration during drying. When too much wet paint or water collects at the boundary of a flat shape, liquid movement carries pigment toward that edge. As the moisture evaporates, the pigment becomes concentrated there and dries as a darker border. Opacity, paper thickness, and a clean brush do not by themselves create this ring effect. The painter should remove excess liquid and distribute the paint evenly, so option A is correct.

Related tags

Edge PoolingDark BorderPigment ConcentrationPoster ColourPainting TechniquesArt EducationClass 9 Mcq

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