Halftone gravure printing inks containing an azo dyestuff
Halide optical elements
Hard setting refractory composition
Hardener for silicate soil stabilizers
Hardener for water glass cements
Hardeners for use in water-glass cement compositions and process
Heat fused refractory product containing zirconia having high co
Heat meltable solid ink
Heat resistive and reinforced composite material
Heat sensitive color developing material
Heat sensitive color developing material
Heat sensitive recording composition containing a complexed phen
Heat sensitive recording papers
Heat transfer printing
Heat-absorbing material
Heat-resistant inorganic compositions
Heat-sensitive coating composition with 4-aromatic and hydroxy s
Heat-sensitive color-producing compositions and articles using s
Heat-sensitive composition and imaging sheet incorporating same
Heat-sensitive recording composition