| 摘要 |
<p>Wiring plates for electric and electronic circuits, which have been produced by using rosin-cored solders, are cleaned by using a fluid composed of a mixt. of n-propanol and water. The spent soln. is regerated by removing the impurities by distillation. The cleaning agent has good solubility for the rosin substance and those impurities which are water-soluble. The water in the soln. has no corrosive effect and by raising the flesh point of the agent, gives greater safety. The cleaning plant does not need to be constructed so that it is explosion-proof.</p> |
