| 摘要 |
PCT No. PCT/SE83/00075 Sec. 371 Date Nov. 9, 1983 Sec. 102(e) Date Nov. 9, 1983 PCT Filed Mar. 8, 1983 PCT Pub. No. WO83/03253 PCT Pub. Date Sep. 29, 1983.The present invention relates to a non-abrasive metal polish or cleaning agent for objects, particularly household objects and ornaments, having surfaces of copper, silver, or chromium or of any alloy which is comprised of these metals either separately or together. The polish is characterized in that it comprises an aqueous solution containing 1-3% by weight nitric acid and 5-10% by weight thiourea or a derivative thereof.
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