Crawling

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crawling

[′krȯl·iŋ]
(materials)
Separation and contraction of the glaze on the surface of a ceramic object during drying or firing so that unglazed areas result.
In a film of wet paint, redistribution of the paint so that it is no longer evenly spread, usually due to imperfect bonding of the paint with the surface.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

Crawling

In painting, a defect that appears during the painting process, where the film breaks, separates, or raises, as a result of applying the paint over a slick or glossy surface.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved

crawling

1. A defect in porcelain enamel, appearing as agglomerates or irregularly shaped “islands.”
2. A parting and contraction of the glaze on the surface of ceramic ware during drying or firing, resulting in unglazed areas bordered by coalesced glaze.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.