Dry writing board possessing anti-halation effect and process fo

Details Dry writing board possessing anti-halation effect and process fo Dry writing board possessing anti-halation effect and process fo

1975-12-23

1978-10-31

Smith, Ronald H.

Stock material or miscellaneous articles

Composite

Of silicon containing

35 61, 427376D, 427419A, 427419B, 427419C, 427419E, 428469, 428471, 428472, B32B 1504

Patent

active

041235908

ABSTRACT:
A dry writing board possessing an anti-halation effect which comprises a metallic plate having a ground coat fire-coated with a glaze comprising an acid component and a base component, the composition of the glaze being 30 to 45% of silicon oxide, 15 to 25% of titanium oxide, 5 to 10% of sodium oxide, 5 to 15% of potassium oxide, 1 to 5% of calcium oxide, 2 to 5% of aluminum oxide and 10 to 20% of boron trioxide, all percentages being by weight.

REFERENCES:
patent: 2909438 (1959-10-01), Kautz
patent: 3397076 (1968-08-01), Little et al.
patent: 3449203 (1969-06-01), Fischer
patent: 3458344 (1969-07-01), Little et al.
patent: 3679467 (1972-07-01), Betzer
patent: 3765931 (1973-10-01), Kyri et al.

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