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Which problem may occur if a second coat is quickly applied over a thick poster-colour layer?

Answer and explanation

Correct answer: The first layer may lift and the surface may become uneven

The governing concept is drying and layer adhesion. A thick poster-colour layer remains soft or partly wet for some time; brushing another coat over it can re-dissolve, drag, or lift the first layer. This makes the surface patchy and uneven, so option D is correct. The other choices describe effects that do not logically follow from applying a coat too soon. Allowing the first layer to dry reduces this risk.

Related tags

Thick LayerSecond CoatLifting PaintPoster ColourDryingPainting TechniquesArt EducationClass 9 Mcq

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