| 摘要 |
<p>PURPOSE:To provide the titled composition giving a letter and mark, etc. having excellent durability to abrasion and scratch, and suitable as an ink for typewriter, etc., by mixing natural glass powder composed mainly of SiO2 and Al2O3 and having specific particle diameter to an ink composition. CONSTITUTION:The objective composition is obtained e.g. by mixing (A) 1- 100pts.wt. of natural glass powder having an average particle diameter of 1-10mu and composed mainly of (i) 70wt% SiO2 and (ii) 15% Al2O3 to (B) 100pts.wt. of an ink composition (e.g. photo-setting ink). EFFECT:Useful for the printing of plastics, metals and glass, etc. as well as paper. USE:Marking of the keyboard of various office automation devices, electrical appliances, etc.</p> |
