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The appearance of clear background due to insufficient opacity is known as ____________

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The appearance of clear background due to insufficient opacity is known as ____________

(a) Running

(b) Sagging

(c) Wrinkling

(d) Grinning

The question was asked in examination.

Query is from Defects in Painting topic in portion Painting, Varnishing, Distempering, etc of Construction & Building Materials

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The correct answer is (d) Grinning

The explanation is: When the final coat of paint has not sufficient opacity, the background is clearly seen. This is known as the Grinning. When a horizontal surfaces is too thickly painted, the defect of  Wrinkling becomes prominent.

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