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Lead Acetate Paper Turns Black
铅醋纸变黑记
古有异人，擅操奇术。一日，于密室之中，置铅醋纸于案。其旁，有一器物，隐隐有气雾升腾。此气雾，乃含硫之秽气也。
不多时，但见铅醋纸之上，渐起异状。初，仅星星黑点，如墨滴宣纸，晕染开来。继而，黑点相连，似蛛丝蔓延，不过盏茶工夫，铅醋纸竟全然变黑。
旁人见之，皆称奇不已。或问其故，异人笑而答曰：“此乃硫与铅醋纸中铅之化合反应也。硫遇铅，如宾逢主，二者相亲，遂成黑色之物，故而铅醋纸变黑。”众人闻之，方悟其中妙理。
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sales7@alchemist-chem.com
+8615371019725
Yana Yang
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