| 摘要 |
<p>In a process for the manufacture of blackened surgical needles, unfinished needles produced from a chromium-containing steel are dipped into an acidic aqueous solution with a chromium (VI) compound. The solution has a temperature in the range from 10 °C to 40 °C, preferably in the range from 18 °C to 25 °C.</p> |
