Chalking

chalking

[′chȯk·iŋ]

(chemistry)

Treating with chalk.

Forming a powder which is easily rubbed off.

(graphic arts)

In printing, rubbing off pigment when the ink dried improperly because it was absorbed too rapidly into the paper.

(metallurgy)

Defect of coated metals in which a layer of powder forms between the coating and the base metal.

McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

Chalking

Disintegration of paint and other coatings, which produces loose powder at, or just beneath, the surface.

Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved

chalking

The formation of a powdery surface condition from the disintegration of a binder or elastomer, as in a coating such as cement paint. The binder is decomposed and the pigment is loosely bound on the surface and resembles chalk when the finger is rubbed over it; caused by weathering or an otherwise destructive environment.

McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.