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REACTIONS OCCURRING IN DECORATION OF VITRIFIED CHINAWARE USING UNDERGLAZE DECALCOMANIA METHOD *
Author(s) -
Flannigan A. M.
Publication year - 1947
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.1151-2916.1947.tb18880.x
Subject(s) - varnish , viscometer , hardening (computing) , relative humidity , materials science , coating , composite material , viscosity , thermodynamics , physics , layer (electronics)
A bstract Studies were made on the causes of defects in underglaze decalcomania transfer on vitreous hotel chinaware. The best hardening‐on firing schedule to eliminate frizzling was as follows: (1) Heat as rapidly as ware will permit to 600°F., (2) at 600° to 800°F., heat at rate not exceeding 40° to 50°F. per hour, and (3) above 800 °F., heat as rapidly as ware will permit. The hardening‐on fire can be eliminated by reducing the coating of varnish through control of the viscosity of the varnish in the range of 4.0 to 6.0 (Mac‐Michael viscosimeter with No. 30 B & S wire, with cup rotating at 19 r.p.m.). The best results on the tackiness period were obtained in a room at 74 °F. dry bulb and 73% relative humidity.