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A surface looks dry but the colour lifts when a second poster colour layer is applied. What may this mean?

Answer and explanation

Correct answer: The layer is surface-dry but still moist underneath

The governing concept is drying through the thickness of a water-based poster-colour layer. Its surface can feel dry while moisture remains below, especially when the coat is thick or conditions are humid. Brushing another layer too soon reactivates or disturbs the soft paint, causing lifting. The paper need not be damaged, and brush cleanliness or oil paint does not explain this behaviour. Allow fuller drying before recoating.

Related tags

Poster ColourSurface DryingLayer LiftingPainting TechniquePainting TechniquesArt EducationClass 9 Mcq

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