Reverse mold: the gold component is melted by a high-frequency or intermediate-frequency centrifugal casting machine, and then poured into a gypsum mold to cast the casting.
Polishing: the process of producing luster on the surface of castings by using magnetic polishing machine or roller polishing machine.
Die: Welding, filing and hammering the casting with ring iron, pit iron and other auxiliary tools to repair the deformation and surface roughness of the casting during casting.
Calendering: Touch the gold surface with agate pen and rub the workpiece to make the surface of the workpiece shine.
Chehua: Carve patterns on the product surface with a lathe with a diamond chehua knife.
Extended data:
Maintenance method
1, cleaning chemicals will change the color of gold, so take off the gold ornaments before cleaning.
2. Avoid direct contact with volatile substances such as perfume and hair gel, otherwise it will easily lead to the fading of gold ornaments.
3. Take off the gold ornaments when swimming to avoid chemical changes on the surface after contact with seawater or pool water.
4. Wrap it in flannel and put it in a jewelry box when keeping it to avoid mutual friction and damage.
5. Gold is soft and easy to deform. Do not pull necklaces and other accessories to avoid deformation.
6. Pure gold jewelry will react chemically when it encounters mercury, and white spots will appear. When cleaning, as long as you barbecue under the alcohol lamp for a while, it will return to its original color.
7. After wearing, gold ornaments often lose their luster due to stains and dust. At this time, just put the gold ornaments in a neutral detergent, soak them in warm water, and then take them out and dry them.
Cleaning method
1, in order to protect the luster of gold jewelry, you can coat it with a thin layer of nail polish.
2. If there is a black silver film on the surface, 2 grams of salt, 7 grams of baking soda, 8 grams of bleaching powder and 60 ml of water can be used to prepare a "gold cleaner". Put the gold jewelry in a bowl, pour the detergent, take it out after 2 hours, rinse it with clear water (preferably not hard water), bury it in sawdust to dry, and then wipe it with a soft cloth.
3. Ring with gemstones Roll a piece of cotton with popsicles or matchsticks, soak it in the mixed solution of toilet water and glycerin, scrub the border of the gem, and then polish the ring with flannel. Never scratch with sharp objects such as blades.
4, salt and vinegar mixed into a cleaning agent, use it to wipe pure gold jewelry, can make it durable.
5. Toothpaste wiping or scrubbing with hot rice soup can also restore luster.
6, 70% nitric acid and 98% sulfuric acid can be used in a ratio of one to three, but this is a chemical reaction to clean, which has a certain loss to gold.
avoid contact
Tips: Pay attention to your own method of cleaning gold jewelry: you can put gold jewelry into diluted soap solution for cleaning, and then use a soft cloth to absorb water.
References:
Baidu encyclopedia-gold jewelry