L is the factory standard. The gold is 24K gold, and foot gold is a very high purity gold. The gold content is not less than 990, which is called foot gold. The subsequent letters L are the code of the foundry, which is the code of the production plant. The gold is a high -colored gold. The appearance of this gold is red and yellow. Its texture is very soft. Foot gold is one of the main raw materials for making gold jewelry. According to the regulations of my country, precious metals such as gold and silver need to be on the surface, and the jewelry produced by the gold generally includes “gold 990”, “G990”, and “AU990”.
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