CN113425055B

CN113425055B - Method for keeping luster and color of pearl

Info

Publication number: CN113425055B
Application number: CN202110945498.9A
Authority: CN
Inventors: 童银洪; 刘永; 纪德安; 肖松丰
Original assignee: Zhanjiang Ocean University Pearl Co ltd; Guangdong Ocean University
Current assignee: Zhanjiang Ocean University Pearl Co ltd; Guangdong Ocean University
Priority date: 2021-08-17
Filing date: 2021-08-17
Publication date: 2023-02-07
Anticipated expiration: 2041-08-17
Also published as: CN113425055A

Abstract

The invention relates to the technical field of pearl processing, and discloses a method for keeping luster and color of pearls, which comprises the following steps: the method comprises the following steps: polishing pearls in a barrel type polishing machine or a vibration polishing machine; then, the pearls are boiled in purified water for 3 to 5 minutes, and the wax on the surfaces of the pearls is removed; then wiping off water on the surface of the pearl by using clean soft cloth, and then placing the pearl in a blast oven at the temperature of 40-45 ℃ for drying; step two: forming a layer of UV adhesive film with the thickness of 0.10-0.15 mm on the surface of the pearl by using an automatic spraying machine through a method of spraying and UV curing for multiple times on the surface of the pretreated pearl; step three: soaking the coated pearl in purified water at 35-40 deg.c for 3-5 hr, wiping off water from the surface of the pearl with clean soft cloth, and drying in the air. The glue film is transparent, does not hinder the appreciation of the pearls, has a protection effect, prevents substances such as sweat of skin and the like from contacting the pearls to corrode the pearls, has the effects of keeping light and color, can slow down the abrasion of the pearls and prolongs the service life.

Description

Method for keeping luster and color of pearl

Technical Field

The invention relates to the technical field of pearl processing, in particular to a method for keeping luster and color of pearls.

Background

The pearl is an organic gem, mainly produced in seawater pearl shellfish and fresh water mussel. The pearl is mineral bead containing calcium carbonate generated by endocrine action of shellfish, and is formed by gathering a large amount of tiny aragonite crystals. The pearls are various in shape and gorgeous in color. In the international gem world, pearls are also listed as lucky stones for june birthdays, and commemorative stones for marrying thirteen and thirty years. Pearls with magnificent colors and elegant temperament, which symbolize health, purity, richness and happiness, have been favored by people since ancient times. However, the beauty of the pearl is not inherent, and the beauty of the pearl is sufficiently exhibited by people only by the processing steps of bleaching, polishing, brightening, etc. since the surface of the pearl which is just taken out from the body of the pearl shell has a layer of organic thin film and a few flaws.

Although pearls are beautiful, the color and luster of pearls change greatly when people wear the pearls. The pearl yellow of old people means that the pearl becomes yellow after being worn for a long time. In addition, the luster of the pearl can change after the pearl is worn, and the change is particularly obvious on the fresh water pearl.

After the pearl jewelry is purchased, wearing needs to be reduced, and careful care needs to be carried out, so that the occurrence of color change and light loss of the pearls can be delayed. This is contrary to the original intention of people who buy and wear pearls and show charm and high price, and results in that pearls are worn rarely or the pearls change color and lose light quickly.

The reason why the pearl discolors and loses luster is that the sweat and the cosmetics of the skin of the pearl can corrode color-developing organic substances or other organic substances in the pearl because the pearl is contacted with the skin in the wearing process of people. Therefore, pearl processing enterprises need to perform the light and color preservation treatment on pearls on the basis of the existing processing procedures, so as to improve the use value of the pearls.

Chinese invention patent CN101642316B (published as 2011, 09/07) discloses a method for fixing color and brightening color pearls, which comprises preparing a color fixing and brightening solution for color pearls, placing the color pearls in the solution, and alternately soaking at 0-15 ℃ and 38-43 ℃ to substantially change the hardness, color and luster and luminosity of the color pearls. Although the patent can improve the hardness, the color and the luminosity of the pearl, the sweat of the skin can still corrode the pearl along with the use of the pearl, so that the color and the luminosity of the pearl become dark and lose color gradually along with the time.

Disclosure of Invention

The invention aims to provide a pearl gloss and color retention method which can prevent the color change and the light loss of pearls and slow down the abrasion of the pearls.

In order to achieve the purpose, the invention provides a method for keeping the luster and the color of pearls, which comprises the following steps:

the method comprises the following steps: pretreatment: polishing the pearls in a barrel type polishing machine or a vibration polishing machine; boiling the pearl in purified water for 3-5 min to remove wax on the surface of the pearl; then wiping off water on the surfaces of the pearls by using clean soft cloth, and then drying the pearls in a blast oven at the temperature of 40-45 ℃;

step two: pearl coating: forming a layer of UV adhesive film with the thickness of 0.10-0.15 mm on the surface of the pearl by using an automatic spraying machine through a method of spraying and UV curing for multiple times on the surface of the pretreated pearl; UV glue sprayed on the surface of the pearl is irradiated and cured by an ultraviolet lamp with the power of 60W-80W for 2-3 min, and the distance between the pearl and the ultraviolet lamp is 30 cm-50 cm;

step three: purifying: soaking the coated pearl in purified water at 35-40 deg.c for 3-5 hr, wiping off water from the surface of the pearl with clean soft cloth, and drying in the air.

As a preferred scheme, the selected pearls are free pearls or pearl with a shell with the grain diameter larger than 8 mm.

Compared with the prior art, the invention has the beneficial effects that:

according to the invention, the UV adhesive film is covered on the surface of the pearl, the UV adhesive film is transparent, the original luster and color of the pearl can be kept, the ornamental aesthetic feeling of the pearl is not influenced, the adhesive film can play a role in protection, the pearl is prevented from being corroded by external substances such as sweat of skin and the like which are contacted with the pearl, the color change and the light loss of the pearl can be prevented, the abrasion of the pearl can be slowed down, the effects of keeping the light and the color are achieved, and the service life of the pearl is prolonged.

Drawings

FIG. 1 is a flow chart of a method for retaining luster and color of a pearl according to an embodiment of the present invention.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

As shown in fig. 1, a method for retaining light and color of a pearl according to a preferred embodiment of the present invention includes the following steps:

the method comprises the following steps: pretreatment: polishing pearls in a barrel type polishing machine or a vibration polishing machine; boiling the pearl in purified water for 3-5 min to remove wax on the surface of the pearl; then wiping off water on the surface of the pearl by using a clean soft cloth, and then placing the pearl in a blast oven at the temperature of 40-45 ℃ for drying.

Step two: pearl coating: forming a layer of UV adhesive film with the thickness of 0.10-0.15 mm on the surface of the pearl by using an automatic spraying machine through a method of spraying and UV curing for multiple times on the surface of the pretreated pearl; the UV curing condition is that the power of an ultraviolet lamp is 60W-80W, the distance is 30 cm-50 cm, and the time is 2-3 min.

This embodiment is through covering the one deck glued membrane on the surface of pearl, and the glued membrane is transparent, can keep original gloss and color of pearl, does not hinder the aesthetic feeling of vwatching of pearl, and the glued membrane can play the guard action, avoids foreign matter such as the sweat of skin to corrode the pearl with pearl contact, can prevent that pearl from discolouring, the light loss, and can slow down pearl wearing and tearing, plays the effect of keeping light, keeping color, the life of extension pearl.

The wax on pearl surface is fully got rid of through poaching to this embodiment, can get rid of other impurity on surface simultaneously, makes the pearl purer, improves gloss and color, simultaneously, can make the UV glue of spraying inseparabler with pearl surface bonding ground, ensures that the bonding strength of the two is high, is unlikely to produce the separation of UV glued membrane from pearl surface and drops the phenomenon.

The pearl film is made of UV glue which is transparent, non-discoloring and non-toxic, so that the pearl covered with the glue film can be worn on a human body without causing harm to the human body. Moreover, the UV adhesive has the advantages of high bonding strength, complete transparency after curing, no yellowing or whitening of the product for a long time, low temperature resistance, high humidity resistance, complete non-toxicity after curing and the like, can be sprayed and applied by an automatic machine, is convenient to operate, and meets the requirements of gloss retention and color retention of pearls.

Furthermore, the pearls selected in the embodiment are free pearls or shell-attached pearls with the particle size larger than 8mm, and the UV adhesive film spraying is convenient. In addition, in the second step, after spraying the UV glue on the pearls, irradiating the pearls by using an ultraviolet lamp with the power of 60W-80W to fully cure the sprayed liquid UV glue to form a UV glue film, wherein the irradiation time is 2-3 min, and the distance between the pearls and the ultraviolet lamp is 30 cm-50 cm.

In summary, the embodiments of the present invention provide a method for protecting pearls from being discolored and discolored, which includes covering a UV adhesive film on the surface of a pearl, wherein the UV adhesive film is transparent, so as to maintain the original luster and color of the pearl, and not to hinder the aesthetic feeling of the pearl, and the adhesive film can protect the pearl, so as to prevent the pearl from being corroded by external substances such as sweat on the skin and the like contacting the pearl, thereby preventing the pearl from being discolored and discolored, and slowing down the abrasion of the pearl, thereby protecting the pearl from being discolored and discolored, and prolonging the service life of the pearl.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A method for keeping pearls bright and color is characterized by comprising the following steps:

the method comprises the following steps: pretreatment: polishing pearls in a barrel type polishing machine or a vibration polishing machine; boiling the pearl in purified water for 3-5 min to remove wax on the surface of the pearl; then wiping off water on the surface of the pearl by using clean soft cloth, and then placing the pearl in a blast oven at the temperature of 40-45 ℃ for drying;

step three: purification: soaking the coated pearl in purified water at 35-40 deg.c for 3-5 hr, wiping off water from the surface of the pearl with clean soft cloth, and drying in the air.

2. The method for keeping pearl luster and color as claimed in claim 1, wherein the pearl is a free pearl or a pearl with a shell with a particle size of more than 8 mm.