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Production technique of chromatic gold ornaments

A production process and gold jewelry technology, applied in the coating process of metal materials, clothing, applications, etc., can solve problems such as single color

Inactive Publication Date: 2008-09-03
SHENZHEN YUEHAO JEWELRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the single color problem caused by all the silver-white gold ornaments at present, the purpose of the present invention is to provide a new type of gold ornaments, which are colored gold ornaments, which can have red, yellow, or black colors.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0008] Embodiment 1 A kind of production process of colored gold ornaments, the surface of the ornaments made of metal is a germanium-plated layer, and the germanium-plated layer is covered with a gold-plated layer or a black nail layer or an alloy layer of gold and copper to form a yellow or black color. , red colored turn gold ornament. Its production method is as follows: (1) hang the ornaments made of metal on the hanger, immerse in the washing liquid and use ultrasonic waves to remove the grease on the ornaments. The washing liquid can be formulated with 1% (wt) wax-removing water, 0.1% (wt) detergent and 98.9% (wt) water. (2) After ultrasonic degreasing, wash off the detergent on the jewelry with water. (3) Put the gold jewelry into the electrolytic cell for electrochemical degreasing. The electrolyte used can be an alkaline electrolyte containing sodium hydroxide 10-209 / l, sodium carbonate 20-309 / l, and trisodium phosphate 20-30 liters, using the hydrogen or oxygen bu...

Embodiment 2

[0009] Embodiment 2 A production process of colored gold ornaments. The surface of the ornaments made of metal is coated, and the outer surface of the plated layer is partially covered with a yellow gold-plated layer or a black nail layer or an alloy layer of gold and copper to form silvery white and yellow or Black, red and white colored handle gold ornaments. The production method can be carried out by brush plating process and electroplating process. The brush plating production process is as follows: (1) The gold ornaments will be degreased by ultrasonic waves. (2) Wash with water. (3) Electrochemical degreasing. (4) Wash with water. (5) Neutralize with sulfuric acid pickling. (6) Plating germanium on the surface of the gold jewelry. (7) Wash with water and recover the electroplating solution. (8) According to the required pattern, a gold-plated layer or an alloy layer of gold and copper is formed on the surface of the ornament by using the brush plating process in t...

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Abstract

The invention discloses a production process of color gold jewellery, comprising the following steps: cleaning the gold jewellery with ultrasonic to remove the grease on the surface; washing the detergent on the gold jewellery with water, and removing grease by electrochemical method; water washing; acid washing with sulphuric acid; plating germanium on the surface of the gold jewellery; water washing the plated gold jewellery to wash away plating solution; locally coating insulating paint on the gold jewellery according to the needed pattern; removing grease attached during the coating process by electrolysis; plating gold or gold-copper alloy on the gold jewellery by electrolysis; dropping off the insulating paint; and water washing and drying. By plating black nails, gold or gold-copper alloy outside the color gold jewellery, multicolor gold jewellery having black, yellow and red or white and the above three colors alternating pattern is formed, which changes the tradition that gold jewellery is only silvery white, in addition, since the plating layer is composed of nail or noble metal, the value of gold jewellery is remained.

Description

technical field [0001] The invention relates to the field of precious metal processing, and more specifically to a production process for colored gold ornaments. Background technique [0002] As a precious metal, gold is not only used in industry (such as electrodes or catalysts), but also can be made into accessories such as jewelry, ornaments or handicrafts. Jewelry made purely of gold is very similar in appearance to platinum. Because the gold jewelry is relatively soft, and the oxidation of impurities contained in the processing process will make its color worse, therefore, the gold jewelry production process currently on the market must have an electroplating process at the end, through which the appearance of the gold jewelry is repainted A layer of germanium is plated to make the surface of the jewelry silver-white and have better hardness. Therefore, the current gold jewelry is a single silvery white. Contents of the invention [0003] Aiming at the problem of s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C5/02B08B3/12C25F1/00C23G1/10C23C30/00A44C25/00
Inventor 周德奋
Owner SHENZHEN YUEHAO JEWELRY
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