How does gold adorn article come true from extract to process after all? The same is gold ornaments. Why is the processing fee gap so big? Because the traditional manual forging process is time-consuming and laborious, much gold can not recover in the grinding process. A gold loss is excellent, and the cost of some products is much higher than the cost of gold itself. In fact, behind each piece of jewelry are a complex process!
What unrefined gold jewelry?
Non-precision processing process of gold jewelry: gold melting – inverted mold – polishing – holding mold – polishing – carving – finished product storage.
The processing process of non-refined gold ornaments is to heat the wax mold with a quartz crucible. Pour the melted gold into the mold, and form a single ingredient suitable for processing gold ornaments after cooling. The element is cut out for mold holding and carving. Simple rough polishing is used for polishing. After cleaning directly on the counter for sale, the pressure is only harsh on the surface, not on the inside. A skilled worker can make hundreds of these products every day.
The following is about to introduce the refined gold production process.
1. Prepare the mold
2. Remove the imported gypsum powder
3. Mix imported gypsum powder with water
4. Air is pumped out with an instrument to increase density
5. Pour the mixed plaster into the mold
6. So that there will be no air in the plaster, the air extraction step is carried out again
7. Remove the yellow tape
8. Apply high-temperature heating
9. Prepare raw material, pure gold
10. Melt the gold bars into liquid
11. Liquid gold is poured into a mold inside the instrument
12. After some time, remove and put in water to cool down
13. Clean with a high-pressure water gun
The wax mold is heated to (850 — 1200 degrees) through a quartz crucible. The molten liquid gold is inverted to present a single ingredient suitable for processing gold ornaments.
14. The pruning
Cut off all the arms of the ring and all the arms of the bracelet. Because of all the components, the bracelet arm is the most stressed and worn area. After the inverted mold, the density of gold is not enough. It needs to be forged by a senior technician for a long time to change the thickness of gold to make it stronger and more durable.
15. Beat
Hammer first, and then polish with a file to make the gold jewelry more delicate and smooth. Then check the interior of the jewelry. Sandpaper all the dead corners, and use grinding needles, grinding wheels, disc grinding wheels, and other tools for fine grinding, further shaping. Much of the gold cannot recover in the forging process, which adds to the cost.
16. Finish the surface by hand
17. Fine grinding of the machine
Grinding needle, grinding wheel, disc grinding wheel, and other tools for fine grinding. This process is generally impossible to see in gold production because the loss is enormous.
18. Soak in hydrochloric acid
19. Clean acid on jewelry with pure water
Polishing with dilute hydrochloric acid immersion. Hydrochloric acid immersion in water after cleaning rough polishing, taking out fine polishing by hand, repeated polishing after carving, carving before removing color. The purpose of the purpose is to make the gold on the surface of the other metals such as iron, zinc, and other trace metal removed. Terra-cotta-colored permanently keeps gold, in the process of wear in the future won’t rub off, and use of water in the forging process are pure water. Lest in tap water trace metals remixed in gold and the color after cleaning, cleaning after again for fine polishing by hand. Note:Hydrochloric acid is corrosive. Please wear gloves
20. Polish by hand again
21. Carve patterns
Then carvings to produce related designs.
22. Sandblast accessories
After the sandblasting is complete, clean the jewelry for the following process
Sandblasting is on the same surface after the first time. The excess gold to get rid of, in the repeated coarse and fine, sandblasting, so that the surface to achieve a better sense of layering, sandblasting process to be meticulous, so time-consuming and laborious.
23. Wire drawing process for accessories
The jewelry for many times of polishing significantly increased the loss of gold and Seiko jewelry to produce a smooth feel and silky texture.
24. Multiple polishes
The jewelry for many times of polishing significantly increased the loss of gold and Seiko jewelry to produce a smooth feel and silky texture.
25. High-temperature treatment
The finished product is heated in a steam engine imported from Israel. Drying after high-temperature treatment
26. The quality inspection
After drying, all the products will be handed over to quality inspection, which is to check the fine artistry and check the purity of gold with imported nuclear element gold meter. The qualified products will be put into storage. The unqualified products will be returned to the factory for re-production.
Four ways to check the quality of the jewelry
1. Check the firmness of the gem
No matter what kind of setting method, it should be ensured that the opening can hold the catch safely. There is no gap in contact with the metal to prevent the gem from falling off accidentally.
2. Check the metal smoothness
Remember, the gem with fine craft won’t have a rough surface. Also won’t have concave and convex, not the whole edge, however smooth and clean even, quality is exquisite, without chisel mark, without burr.
3. Whether there are welding seams or marks on the jewelry
The surface of jewelry should be bright and uniform, consistent color, corner and concave and convex junction without pores, black spots, or dim luster.
4. Check that the weight is correct
A well-made ring is slightly heavier than the foot. If the work is not good, the call will turn and slide towards the belly. The check method is to put the ring on the finger and gently shake it so that the ring does not turn to the finger.
27. Metal measuring instrument
28. Check the test results of gold ornaments
29. Product reinspection
Before leaving the factory, the person in charge of the store will re-check the qualified products, weigh and label the eligible products, and finally leave the factory.
Conclusion
Some people ask why the gold jewelry surface technology is so complicated because only in this way, the sense of layers and three-dimensional gold jewelry can be displayed.
According to the current scale, there is no problem for the jewelry factory to process 200 kg of gold ornaments per month. Then why only 20 kilograms per month? Because gold jewelry is designed and produced by senior craftsmen with great care. Each piece of gold jewelry is created under the premise of losing more cost, so the cost performance of gold jewelry is much higher than that of other products. Want to act the role of the gold that raises an eye best, namely additionally, most delicate, most show everybody. Let everybody see what be actual gold Seiko act the role of the article.
