Pearl shape screening method for mass-production pearl culture

Abstract

The invention discloses a pearl shape screening method for mass-production pearl culture, and belongs to the field of pearl screening. The pearl shape screening method for mass-production pearl culture comprises the steps of dimension screening, preliminary roundness screening, multi-point marking, further roundness screening and cleaning, and wiping-drying, wherein further screening can be carried out on pearls subjected to preliminary screening via naked eyes through a primary-secondary screening plate, so that the screened pearls are higher in roundness; meanwhile, the surfaces of the pearls can be marked through multi-point marking bulges; the specific roundness conditions of the surfaces of the pearls can be intuitively reflected by observing the uniformity, sizes and missing states of marking traces on the surfaces of the pearls; the screening accuracy is remarkably increased compared with direct naked-eye observation and screening, and the shortages of manual screening are effectively made up; and meanwhile, the marking traces are capable of lowering the difficulty and workload for the later-period surface treatment for the pearls with defective roundness.

Description

technical field [0001] The invention relates to the field of pearl screening, more specifically, to a pearl type screening method for mass-production pearl cultivation. Background technique [0002] Freshwater pearls refer to pearls produced in rivers and rivers. The main breeding areas of freshwater pearls in my country are in Zhuji, Changde, Suzhou, Jiangxi, Hubei, and Anhui. At present, the freshwater pearls are mostly made of trigonopsis. And has excellent skin care effect. It can whiten and lighten spots. [0003] The inorganic components of pearls are mainly calcium carbonate and magnesium carbonate, accounting for more than 91%, followed by silicon oxide, calcium phosphate, Al2O3 and Fe2O3. Organic matter in pearls contains aspartic acid, threonine, serine, glutamic acid, glycine, alanine, cystine, valine, methionine, isoleucine, leucine, tyrosine, benzene 17 kinds of amino acids such as alanine, histidine, arginine and proline. In addition, it also contains more...

AI Technical Summary

Problems solved by technology

[0007] For the existing screening of pearl bead type, the screening of particle size is more machine screening, but the screening of roundness is more screening by naked eye observation, but the screening is carried out by directly observing the surface profile of pearls. On the one hand, it is subject to work The influence of the subjective feelings of personnel leads to large screening errors. On the other hand, long-term observation with the eyes is prone to visual illusions, resulting in poor screening effects. In addition, in the existing screening methods, only roughly high roundness can be screened out. The specific roundness of the pearls, that is, the protruding or concave parts of the pearl surface cannot be determined, which leads to the need to determine the roundness of the pearl surface again when the surface treatment process is performed on the defective pearls in the later stage, which increases the workload

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