English to Russian Tech/Engineering Electronics / Elect Eng forensic chemistry

The machine works by evaporating two thin layers of gold and zink into the exitbit. First the gold is melted and evaporates. As it cools tiny gold particles recondence all over the article, filling in and sticking to any contaminants. When the zinc is vaporized, it attaches to the gold, making the impressions even more visible. The metal coating acts like a glaze, exposing the minutest remnants of sweat, dirt or blood. - определение наличия крови и т. п. на пластике, и обгоревших матералах