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SOME ASPECTS OF THE SCUMMING PROBLEM *
Author(s) -
SpencerStrong G. H.,
McMahon L. J.
Publication year - 1940
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.1151-2916.1940.tb14215.x
Subject(s) - fineness , grinding , atmosphere (unit) , metallurgy , materials science , sulfate , mineralogy , composite material , chemical engineering , chemistry , engineering , physics , thermodynamics
A bstract The two general types of scumming and their causes are discussed. The sulfate type of scumming is caused by sulfates either in the enamel materials or in the atmosphere to which the ware is exposed. Nonsulfate types of scums are usually caused by a combination of factors, which include underfiring, excess water vapor in the furnace atmosphere, fineness of grinding, and mill additions, especially clays and opacifiers.