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Processing process for gold products

A processing technology and product technology, applied in the processing technology field of gold products, can solve the problems of not being able to reflect the purest golden yellow of gold and impure appearance, etc.

Inactive Publication Date: 2012-09-12
莆田市金伯爵珠宝首饰有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] At present, the surface color of most of the existing gold products produced through the above process is either white or blue, and the overall appearance is not pure, which cannot reflect the purest golden yellow appearance of gold

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The processing technology of gold products, gold products go through the steps of melting gold, pouring mold, polishing, mold holding, calendering, embossing, and finally the brightness treatment step. The specific brightness treatment process is as follows:

[0030] Preparation of hot acid: Slowly pour 1000ML of sulfuric acid; 100ML of phosphoric acid; 10ML of nitric acid;

[0031] Preparation of cold acid: Mix 200ML of hydrofluoric acid, 300ML of hydrochloric acid, and 10g of table salt to form a mixture, and stir evenly. Then add 25g of table salt to 1000ML water to form a 2.5% brine, heat it up to 50°, pour it into the mixture and stir evenly to form cold acid.

[0032] Soak the gold product in hot acid for about 3 seconds and take it out, then soak it in cold acid for 10 seconds and take it out, then rinse it with clean water to complete. The hot acid should keep boiling during the soaking process.

[0033] Gold products treated by this process are yellow and brig...

Embodiment 2

[0035] The processing technology of gold products, gold products go through the steps of melting gold, pouring mold, polishing, mold holding, calendering, embossing, and finally the brightness treatment step. The specific brightness treatment process is as follows:

[0036] Preparation of hot acid: Slowly pour 900ML of sulfuric acid; 100ML of phosphoric acid; 10ML of nitric acid;

[0037] Preparation of cold acid: Mix 200ML of hydrofluoric acid, 300ML of hydrochloric acid, and 10g of table salt to form a mixture, and stir evenly. Then add 30g of table salt to 1000ML water to form a 3% brine, heat it to 40°, pour it into the mixture and stir evenly to form cold acid.

[0038] Soak the gold product in hot acid for about 5 seconds and take it out, then soak it in cold acid for 12 seconds and take it out, then rinse it with clean water to complete. The hot acid should keep boiling during the soaking process.

[0039] Gold products treated by this process are yellow and bright, sh...

Embodiment 3

[0041] The processing technology of gold products, gold products go through the steps of melting gold, pouring mold, polishing, mold holding, calendering, embossing, and finally the brightness treatment step. The specific brightness treatment process is as follows:

[0042] Preparation of hot acid: Slowly pour 1000ML of sulfuric acid; 100ML of phosphoric acid; 10ML of nitric acid;

[0043] Preparation of cold acid: Mix 200ML of hydrofluoric acid, 300ML of hydrochloric acid, and 10g of table salt to form a mixture, and stir evenly. Then add 25g of table salt to 1000ML water to form a concentration of 2.5% brine, and heat it to 50°, then pour it into the mixture and stir evenly to form cold acid.

[0044] Soak the gold product in hot acid for about 5 seconds and take it out, then soak it in cold acid for 10 seconds and take it out, then rinse it with clean water to complete. The hot acid should keep boiling during the soaking process.

[0045] The surface color of gold products...

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PUM

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Abstract

The invention provides processing process for gold products, which comprises the steps of gold melting, mould reversing, polishing, mould grasping, press finishing and embrotheridery, and is characterized by further comprising the step of brightness treatment, the step is performed after the step of embrotheridery, and the step of brightness treatment comprises the followings: (1), hot acid preparation: pouring sulfuric acid, phosphoric acid, nitric acid and potassium nitrate according to priority into a container for uniform stirring, and heating until boiling, so as to form the hot acid; (2), cold acid preparation: mixing hydrofluoric acid, hydrochloric acid and dairy salt together for uniform stirring so as to from mixed solution, and then pouring salt water heated into the mixed solution for uniform stirring, so as to form the cold acid; and (3), placing gold products treated through embrotheridery into hot acid for soaking and then taking out, then placing into the cold acid for soaking and then taking out, and finally washing the gold products clean by using water, wherein the hot acid is kept to be under a boiling state.

Description

technical field [0001] The invention relates to a processing technology of gold products, in particular to a processing technology capable of improving the brightness of gold products. Background technique [0002] The general processing process of gold products: melting gold→inverting the mold→holding the mold→polishing→car embossing→calendering→QC (testing)→finished product storage. The specific process of each step is as follows: [0003] Melting gold: use acetylene flame to burn the unforged gold in the quartz crucible to melt it into a single ingredient suitable for processing jewelry. [0004] Mold inversion: Use a high-frequency or medium-frequency centrifugal casting machine to melt the gold ingredients and then pour them into a plaster mold to cast the casting. [0005] Polishing: The process of using a magnetic polisher or a tumbler polisher to produce a glossy finish on the surface of the casting. [0006] Die holding: Welding, filing and hammering castings wit...

Claims

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Application Information

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IPC IPC(8): C23G1/10C23F3/06
Inventor 邹志群
Owner 莆田市金伯爵珠宝首饰有限公司
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