Premium
ELIMINATION OF BLISTERING OF ENAMELED‐IRON NUMBER PLATES *
Author(s) -
Scott W. J.
Publication year - 1933
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.1151-2916.1933.tb16953.x
Subject(s) - blisters , metallurgy , materials science , cast iron , plating (geology) , composite material , geology , geophysics
In the manufacture of enameled‐iron number plates for dials on pay‐station telephones, blisters, formed in the enamel during the low‐temperature firing of the printed characters and background, resulted in an average process loss of 14%. Proposed remedies tried without success were (1) the use of different enamels and enameling irons, (2) firing the characters at other temperatures than the standard temperature of 1310°F, and (3) special treatment of the iron surface before enameling, such as deep steelblasting, heating at 1310°F prior to enameling, or copper plating. The blistering was finally eliminated by increasing the length of the heating‐up period in the character firing operation.