Be careful of the 'obscure method' of gold processing

After wearing gold jewellery for a long time, the idea of u200bu200brenewing it is inevitable. Due to the high plasticity of gold, the reprocessing of gold jewellery came into being. The gold jewellery that has been tired of its owner flipped back and forth in the goldsmith and magically became a piece. New decorations; or the gold chain on the neck has become a ring between the fingers, or the gold jewelry of the gray aunt has been worn for a long time, and the idea of u200bu200brenewing it is inevitably developed. Because of the high plasticity of gold, the reprocessing of gold decorations is in demand. Born, the gold ornaments that have been tired of their masters flipped back and forth in the goldsmith, and magically became a new ornament; or the gold chain on the neck became a ring between the fingers, or the torn clothes like Cinderella turned into a dress In general, the thick bracelet became a fashionable stud ring in a blink of an eye. The tasteless tasteless tasteless chicken ribs of abandonment were turned into a miracle. This renovation quickly catered to people's pursuit of freshness and was greatly favored. However, recently, many gold jewellery has been reduced in status after processing in small workshops, and there is a shortage of weight. Obviously supervising with his own eyes, how could he be'searched' without knowing? Many deceived people are very puzzled. According to industry experts, gold jewellery processing itself is lossy, but most of the regular stores use modern technology, and the loss standard is controlled at 1%. However, most small workshops have low capital investment and simple equipment, so they can only use some backward processing techniques, which naturally consumes more. If you run into tricks from profiteers, 30% of the loss is not a problem. Generally speaking, the processing of gold jewellery has to go through four major procedures: melting, casting, repairing, and polishing, each of which may lead to consumption. For example, in small workshops, gypsum molds are mostly used for embossing in small workshops. The rough mold surface itself can absorb a lot of weight. Once the shape is pressed, it needs to be repaired, and the extra area needs to be polished and trimmed. If a small workshop still uses'aqua regia' (a mixture of nitric acid and sulfuric acid, which is not allowed to be used because it is poisonous) when melting and polishing, the gold on the surface will melt in the'aqua regia', and the loss will be even more invisible. Even if the customer re-claims, there is no clue, because the other party has already had a countermeasure, and the scale has been 'hand and foot'. When the customer went back and found that the jewelry was slimming, it was too late, and the other party had escaped early. Compared with weight, the method of reducing color is much more concealed. To reprocess, the gold must be melted. Small workshops mostly use tongs pots for melting, and there are big flower heads here. The scammer only needs to put some copper or silver in the tongs pot in advance, and after it is melted with the gold, the weight of the gold is heavier, but the fineness is reduced. The original gold content of 99.9% may become 60%. In this way, even if they deduct some gold in the subsequent pressing, repairing, and polishing process, the weight will remain the same when the final delivery is made. Even if consumers get the official store to re-claim, as long as they do not check the quality, they will not be able to find out. Many people are eager to go to a small shop for cheap processing, and believe that the supervision of the work will not go wrong, don't you know that there are many blindfolds here. To prevent being deceived, it is safer to go to a regular store for processing. Previous article: How to buy pure gold jewelry Next article: Why 99 gold jewelry