SHEET FOR USE IN FIRING BASE PLATES

摘要

Disclosed is a sheet (1, 11, 21, 31) which may be used in firing ceramic-, glass- and metal-faced base plates (2, 12, 22, 32). The sheet (1, 11, 21, 31) comprises a combustible sheet (3, 13, 23, 33), such as paper pulp, and a coating layer (4, 14, 34) coated on at least one surface of the combustible sheet (3, 13, 23, 33). The coating layer (4, 14, 34) comprises a powder of a a high melting point material (5, 15, 35) and powdered carbon (6, 16, 36) which may be formed separately from the layer comprising the powdered high melting point material. The coating layer (4, 14, 34), comprising the powdered carbon (6, 16, 36), effectively prevents shrinkage of the sheet (1, 11, 21, 31) during firing, and thus prevents adhesion between adjacent stacked base plates (2, 12, 22, 32) and between the base plates and the supporting base. The sheet (1, 11, 21, 31) of the present disclosure further provides a layer of uniform breadth which prevents the formation of undulations and pin-holes in the base plates during firing.