Pearl processing and preservation after harvest

Freshly harvested pearls have seawater, body fluids, and dirt attached to the surface. If they are left for too long, the gelatinous calcium carbonate and organic matter on the surface of the pearl will condense, and the nacre will darken, be oxidized, and deteriorate quality. Therefore, it should be processed in time after harvesting.

(1) General washing: The harvested pearls should be soaked in fresh water in time, then washed with soap water and fresh water, and then wiped and stored. In order to completely wash away the remaining mucus and dirt on the beaded attachments, the harvested pearls, after being washed with fresh water, can be soaked in salt water for 5'10 minutes and then rubbed with fine salt mixed pearls (the ratio of 2:1). Lightly soapy water and clean water are rinsed many times, and finally lightened with a towel or flannel, dried and stored.

(2) Pharmaceutical washing

1 Poor pearls can be washed with 0.15% '0.2% dodecyl sulfate and then washed with water, dried and stored.

2 Pearls with dull or blemishes on the surface can be washed with 3% hydrogen peroxide, then rinsed with water and then stored.

The medicinal pearls should not be treated with chemical agents after harvesting, but only washed with clean water and brine.

All treated and dried pearls should be placed in a clean cloth bag, sealed in a cupboard, and stored in a cabinet. Do not place in hot water.

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