| 摘要 |
<p>Fabrication of printed circuits or decorative metal films is by compressing a metallised insulator (Al, Cu, or Zn on plastic film or resin coated paper 0.5 to 2 mm thich) between two electrodes, and applying 3000-30000 pref. 10000-15000 v, AC. The electrode in contract with the metal is engraved with the negative of the desired pattern and metal in contact with the relief is removed. Any residual dust is blown away by an air jet.</p> |
