Technique for processing black series fresh water pearl

A freshwater pearl and processing technology, applied in jewelry, clothing, organic dyes, etc., can solve the problems of cobalt salt toxicity, cobalt element exceeding the standard, pearl blackening, etc., and achieve the effect of no spots on the surface, strong durability and beautiful color

Inactive Publication Date: 2008-07-02
浙江千足珠宝有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many problems. The surface of the pearl treated with the strong oxidant potassium permanganate is not bright enough, and the process requirements are particularly harsh, and the treated pearl will turn black in the natural environment. Cobalt salts are usually poisonous. Detected pink pearls treated with cobalt salt and found that the cobalt element seriously exceeded the standard
A few samples of black pearls dyed with silver nitrate have appeared on the market, but it is known that they are easy to change color. After dyeing, they must be polished and waxed immediately to keep the color unchanged for about a month

Method used

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  • Technique for processing black series fresh water pearl

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Taken after being enhanced by 60 Co-γ-ray irradiation (irradiation dose of 600,000 roentgens / min, irradiation for 20 hours) is basically blue-gray pearl samples to be treated with malachite green overtones. Wash and let dry for 24 hours before staining.

[0033] Slowly add 25% (w / w) NH to a clean glass bottle containing 100 mL of 2% (w / w) silver nitrate (prepared in purified water) solution 3 ·H 2 020mL, add ammonium nitrate to adjust the pH=9.8∽10.4, then add 20mL of the compound of ethylene glycol methyl ether and ethanol with a volume ratio of 1:9, stir the solution evenly and put it into the pearls to be dyed, the bath ratio is 1:2, Place in a box with a constant temperature of 58°C and irradiated with a fluorescent lamp. Take it out after 25 days. Wash the pearls with pure water, put them in a petroleum ether solution containing 1% (w / w) methyl mercaptan, place them at low temperature (not exceeding 10°C) for about 1 hour, take them out, wash them, dry them and...

Embodiment 2

[0035] Take pearl samples that are basically bluish-gray and are to be treated with malachite green overtones after being irradiated by 60Co-γ rays (irradiation dose of 700,000 roentgens / min for 20 hours) after brightening. Wash and let dry for 24 hours before staining.

[0036] 2% AgNO in 100ml 3 Add 20ml of 25% ammonia water, 20ml of a mixture of ethanol and ethylene glycol with a volume ratio of 9:1, stir to mix evenly, add 2mL of nano-titanium dioxide sol, and place it in a constant temperature water bath at 60-70°C for three days until the color changes to silver-purple Finally, transfer the dyeing system to a box with a constant temperature of 58°C and irradiated by fluorescent lamps, take it out after 5 to 8 days, take out the pearls after the dyeing solution is cooled, wash them immediately, and put them in a container of benzotriazole prepared by pure water. In the container of the post-treatment agent of the aqueous solution with a fraction of 5% and ATFIN AGS PLUS (s...

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Abstract

The invention provides a processing process of a freshwater black pearl. The process includes the following steps that after selected light-color freshwater pearl is radiated by <60>Co-Gamma rays, the pearls are cleaned and dried; then the pearls are immerged in to dye liquid for a dye treatment of 3 to 25 days and under a temperature between 55 to 70 DEG C; finally the black pearls can be obtained after a later treatment. The invention mainly has the beneficial effects that the treated pearl has beautiful and bright colors, without spots on the surface and with a strong durability, and the quality can be preserved for at least two years and the brightness is durable; and the pearl has no flaking or color-fading and other defects. The whole treatment process avoids harmful chemicals and the process just adopts the <60>Co-Gamma ray which has the advantages that spots can be eliminated; the range is far and radioactivity remnant can be avoided, etc. And no radioactivity remnant on the peal treated by the <60>Co-Gamma ray can be confirmed. A micro-silver can be preserved on the surface of the treated pearl so as to achieve the functions of diminishing inflammation and sterilization. The invention is a green decoration.

Description

(1) Technical field [0001] The invention relates to a processing technology of black freshwater pearls. (2) Background technology [0002] Freshwater pearls are very rich in color. There are mainly white, pink, purple, etc., from light to deep, with thousands of changes. But no satisfying black. [0003] Currently commercially available freshwater black pearls are basically obtained through the following types of processing: 1. irradiation treatment; 2. dyeing plus irradiation treatment; 3. different dyeing processes. Irradiation is a good method that can be used to change the color of pearls. However, due to the high cost of the equipment used for irradiation and the great danger of nuclear radiation, it is still limited by many conditions when it is used in the study of pearl color change. At present, the technology in this area is not stable and mature enough, and the obtained pearls have a single color, only blue-gray or black, and the color is not satisfactory. Alth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A44C27/00C09B67/00
Inventor 陈海军李小龙翁学庆刘兴元谢乾程胡佳燕练爱芳
Owner 浙江千足珠宝有限公司
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