| 摘要 |
<p>PURPOSE:To obtain ink for marking a part that has not been soldered well, which is resistance to washing and hardly be solidified by incorporating a pigment, ethyl cellulose and alpha-terpineol at a specific ratio. CONSTITUTION:100 parts, by weight, of pigment of a color which is preferably different from that of a print base board to be marked; 2-20 parts, by weight, of low molecular weight ethyl cellulose; and 70-150 parts, by weight, of alpha- terpineol are compounded to obtain the objective marking ink. This ink is used to mark the part of the print base board which has not been soldered well. After marking, the print base board should be washed with a solvent to remove the ink and the residue of a soldering flux therefrom.</p> |
