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2020
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The division of gold processing technology for silver jewelry and the production process of silver ware
In addition, there are techniques such as inlay, emerald decoration, and enamel. There are more than ten kinds of materials used for inlaying, including white jade, sapphire, jasper, topaz, jadeite, turquoise, malachite, agate, amber, crystal, pearl, ivory, etc. The process of embellishing jade: After making the basic mold of the silver jewelry, according to the pattern requirements, the silver wire is adhered to the silver tire, welded firmly, and then subjected to repeated processes such as mold burning, acid washing, and brushing to remove oil stains. Then, the colored bird feathers (usually blue and green) are filled with glue in the pattern of the silver wire frame, and finally polished. The embellishment jade silver jewelry is often gilded, and craftsmen know that blue and gold are the most brilliant.
The main tools for manufacturing silverware include a silver melting furnace, a wind box, a hammer, pliers, a multi-functional set of chiseling and cutting tools, a workbench table, a vice, a spray gun, a welding gun, a spray lamp, a crucible, measuring tools, a steel tape measure, an angle ruler, etc. In addition, there are various uses such as sintered copper molds, multifunctional files, large and small iron sheet scissors, compasses, angle rulers, long handled filiform copper brushes, flat headed anvils, etc. The main raw and auxiliary materials for manufacturing silver ware include waste silver products, silver flour, copper, welding pots, clay, coke, soap lime, white rock, borax, sawn wood flour, bad water, dry soil, etc.
Classification of surface gold processing techniques for silver jewelry
1. Gilding (gilding) process: A method of decorating objects with gold. Brush the gold dissolved in mercury onto the surface of the object, dry it, bake it with charcoal fire, and then polish it with agate. The entire process usually needs to be repeated three times.
2. Dipping in gold process: Dip the object in a gold solution that has been dissolved in mercury (mercury) or trihydrate (a mixture of one part concentrated nitric acid and three parts concentrated hydrochloric acid), and then take it out. This is the simplest method of surface gold.
3. Clay gold process: Paint made of metal powder is applied to the surface of objects.
4. Gold plating process: Using electrolysis or other chemical methods to attach gold to the surface of a metal or other object, forming a thin layer of gold. 5. Plating process: Apply gold foil to objects.
6. Baojin Craft: Hammer gold or silver into thin pieces, wrap them on the body, and then hammer them tightly to make handmade silver artifacts. Firstly, cast them into shape, and the casting method for carving details comes from bronze craftsmanship. After the Tang Dynasty, the use of gold and silver ornaments became less and less common. Engraving requires the use of various shapes of steel chisels to carve patterns on the surface or back of the blank. There are several types of flower carving techniques, including yang carving, yin carving, and flat hollow carving. A considerable portion of Yunnan silver ornaments passed down from the Ming Dynasty were made by combining casting and chiseling.
2、 Hammer carving is the main method, and chiseling and engraving are the auxiliary methods. This type of silver decoration is the most common in Yunnan. Some use hammers and chisels from forming to decoration, some are welded and formed after hammering and chiseling, and some are decorated with silver rings and chains to form the entire jewelry. Some silver decorations have vertical or circular shapes, which are also welded after hammering and chiseling, and the details are carved and engraved.
3、 The filigree process involves weaving, stacking, pinching, and soldering silver wire to create various flat or three-dimensional patterns and decorations, including inlay, embellishment, or enamel, collectively known as filigree process. It can be made into larger sized jewelry with less silver material and is very exquisite and exquisite. Often, techniques such as inlay, gilding, embellishment, or enamel are used simultaneously. There were many types of silver ornaments in Yunnan during the Qing Dynasty.
Silver jewelry processing Silver ware production process:
1. Silver melting: First, weigh the weight of the silver material used using a scale, and crush the large silver material into a crucible to melt on the furnace. When the blast furnace reaches a white heat level, silver begins to melt and a copper mold is cast using a long handled pliers to clamp the crucible.
2. Forging: While the silver material is not getting cold, start forging and shape the silver blank according to the ideal.
3. Blanking: Compare the designed silver artwork to lower the silver sheet. The silver sheet should be slightly larger than the artwork, leaving a certain processing allowance. If it is a special shape, it should be unfolded into a flat surface for processing.
4. Rough processing and preliminary hammering to create large bumps and bumps in silver jewelry
5. Making a lead holder: The role of a lead holder is to hold and fix the silver pieces that need to be processed for further production. Place the rough processed silver sheet upside down in a sand box, inject the melted lead liquid into it, and cool it to form. I used to use rosin as a support
6. Precision machining: This process includes processes such as hammering, carving, and engraving. It is the most crucial part of the entire process, and many silversmiths in Yunnan call this process "carving". The tools used for carving flowers are a small hammer and several chisels, with various chisel heads such as pointed, round, flat, crescent shaped, petal shaped, etc., which can be selected according to needs. When processing, the hammer is held in the left hand, like a painter using a pen, and the hearts and hands correspond to each other, carving groups of vivid and distinctive patterns. The key to the quality of silver jewelry craftsmanship lies in this moment, where the fine details of carving fully demonstrate the craftsman's meticulousness and accuracy.
7. Welding: For the silver jewelry that needs to be welded, hang welding flux at the interface and heat it up in the furnace for a moment before welding. The ingredients of welding flux, the temperature of the furnace fire, and the length of heating time are closely related to the welding quality.
8. Acid washing: After repeated pounding and moderate temperature, the surface of silver jewelry may turn black or be stained with impurities. Therefore, acid pickling is required. The pickling solution is composed of nitric acid and sulfuric acid, and the silver jewelry is rinsed in the pickling solution. Quickly remove and rinse with clean water. The timing of this process is very important, as the immersion time in acid solution is too short and impurities cannot be cleaned thoroughly. It will affect the luster of silver jewelry. If the immersion time is too long, the pickling solution will corrode the silver decoration, and also damage the color and smoothness. After rinsing and drying, be sure to choose a sunny day. The clearer the weather, the more beautiful the silver jewelry color will be.