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INFLUENCE OF COMPOSITIONS OF UNDERSLIPS, GLAZES, AND BODIES ON BLISTERING AND OTHER GLAŹE DEFECT́S *
Author(s) -
Schurecht H. G.,
McMahon J. F.
Publication year - 1937
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1937.tb19916.x
Subject(s) - glaze , blisters , materials science , ceramic glaze , metallurgy , composite material , mineralogy , geology , ceramic
A bstract The adhesion between underslip and body or glaze is frequently broken in spots as a result of air being forced to the surfaces during the spraying of successive wet coats of slip or glaze. These breaks, which do not always heal in firing, develop defects known as blisters, pinholes, and round bare spots. This tendency may be reduced (1) by increasing the percentage of plastic clay in the underslip; (2) by spraying the underslip thinner; (3) by selecting more suitable ball clays; (4) by changing the raw materials and compositions of glazes; and (5) by using coarse in place of fine‐grained bodies. It was found that blistering developed on bisque as well as on raw bodies. Many correlated glaze defects not visible on the dry specimens first appear after firing.