The frame material is mainly divided into three types: Non-metallic Metallic Natural material .
Non-metal
Celluloid : It is a material that was used for glasses for a long time. It is rare now. Celluloid is good plasticity and has a high hardness. It can be dyed into various colors. The disadvantage is that it has poor stability and is prone to corrosion and aging. It will emit camphor odor when rubbing, which can be used to identify this material . Due to its prone to aging and combustible properties, it is rarely used now.
acetate fiber : Compared with celluloid, acetate fiber is not flammable. Generally, chemical racks are mostly of this material. According to the processing method, they can be divided into injection molding racks and plate racks and .
Injection molding rack : low cost, joints, rough, used for sunglasses low-end frame (hot processing and manufacturing)
board frame : manufactured by cold processing, fine, good quality, durable. Now most non-metal frames are carbon crystal frames made of board materials: they are characterized by high strength, strong, but the material is brittle, and they are prone to brittle cracks after impact and collision in winter. The method to distinguish carbon crystal frames is: there are obvious cutting marks in the temples.
epoxy resin : light specific gravity, bright colors, good elasticity and long life. Epoxy resin was developed by European glasses companies and mainly used to manufacture famous brand stands such as CD, Dunhill. The way to distinguish epoxy resin is that there are no stamens in the temples, while the acetate fiber rack has metal stamens. In addition, the epoxy resin rack is brighter in color.
tungsten carbon : Tungsten carbon frame is only half the weight of traditional board frames. It is fashionable and ultra-light, strong and flexible, and does not change; environmentally friendly materials, anti-allergic and comfortable, and does not fade; good stability, high temperature resistance, corrosion resistance, and can also be twisted 360 degrees without deformation.
Metal
White copper frame : (called copper-zinc alloy): The main components are copper 64% zinc 18% nickel 18%, the frame material is cheap and easy to process and electroplating is mainly used for manufacturing hinge trays, etc., small parts and low-end.
high nickel alloy frame : The nickel content is as high as 80%, mainly nickel chromium alloy, manganese nickel alloy , etc. High nickel alloy has better corrosion resistance, and in addition, the material has good elasticity.
Pure titanium frame : The specific gravity of titanium is only 4.5, very corrosion-resistant, and has a strength of twice that of steel. It is used to manufacture space shuttle case, etc., and is called "space metal", and there is no metal allergy. In the early stage, titanium materials had problems such as cutting and welding. With the development of technology, these problems have been gradually solved. In the Japanese market, titanium materials have become the mainstream, and titanium materials in the European and American markets are also mainly from Japan. Titanium frames are generally represented as Ti-P or TiTAN, and are basically made of titanium except for trays, hinges, and screws.
β-TiTAN titanium alloy refers to a special alloy formed by mixing pure titanium (70%) and rare metal metals such as cobalt and chromium (30%). The ultra-light and super elastic frame can be made very fine. Since it is a stable alloy of rare metals such as titanium and cobalt and chromium, it will not cause skin allergies, it will develop and become more popular in the next few decades.
Gold Package Stand The process is to add brazing material between the surface metal and the substrate or directly mechanically combine it. Compared with electroplating, the surface metal layer of the cladding material is thicker, and it also has a bright appearance, with good durability and corrosion resistance. Representation of Baojin: According to the provisions of the International Precious Metals Conference, products with a weight ratio of more than 1/20 are represented by GF, and products with a weight ratio of less than 1/20 are represented by GP.
K gold frame is generally 8K gold , indicating that the content of pure gold 4K in the frame is 18/24. If it is represented by 750/1000, it means that the silver, copper and other substances are 250/1000. If the weight of 18K gold glasses is 40 grams, the gold content is 18÷24×40=30 grams.
Natural material
Hawksbill rack Hawksbill is a kind of sea turtle produced in tropical seas. Its main ingredient is about 90% of protein. In addition, it also contains about 10% moisture. The ingredients of tortoiseshell are similar to those of human skin and nails, so the touch and unique transparency and color markings make it look elegant and generous.
In the tortoiseshell rack, the lighter the color, the higher the value, because the lighter the color is concentrated on the abdomen of the sea turtle. The tortoiseshell rack can be bonded and repaired after it is broken. When displaying products, some water needs to be placed next to it to prevent drying. In addition, the tortoiseshell rack must not be cleaned with ultrasonic waves, otherwise it will turn white and lose its luster. Since the signing of the Washington Convention on Endangered Animal Protection, hawksbills have been banned from being captured worldwide. Most of the current stocks sold on the market are past, and their value will increase year by year.
ox horn rack ox horn frame made of ox horns is no longer common
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