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Spectacle frame classification and introduction, teach you how to choose a frame

Posting time:2022-10-06 01:40:55

Spectacle frame classification and introduction, teach you how to choose a frame

The function of glasses is not only to correct refractive errors, but also to play a decorative role. The first thing you should do when you go to an optical shop to get glasses is to choose a pair of frames you like and wear them on your face to make yourself look more temperamental. Let me share with you some common sense about glasses frames, so that you can be more handy when choosing glasses. 1. The structure of the spectacle frame We decompose the spectacle frame, which can be divided into seven parts: frame, nose bridge, nose pad, pile head, hinge, temple, foot cover, etc. Decomposition diagram of glasses frame Frame: The function of the frame is mainly to install the lens, and its shape determines the style of the whole pair of glasses, including round, oval, square and other shapes. Nose bridge: connect the left and right mirror frames and fix the left and right. Nose pads: Generally, metal frames have nose pads, which can adjust the distance between the lenses and the height of the glasses, and can adapt to various nose shapes, but the nose pads are easy to hide dirt and dirt, and they will turn yellow every once in a while and need to be replaced. ; Most of the sheet metal frames do not have nose pads and cannot be adjusted. They are suitable for people with a high nose bridge. If the nose bridge is low, it is easy to slip and wear unstable. No nose pad frames have nose pad frames: the connection between the mirror ring and the mirror angle is generally curved. Hinges: Connect the pile head and the temples, which can be moved. Mirror legs: connected with the pile head, can move, play the role of fixing the mirror ring and wear it on the ear. Foot cover: set on the temples to play a non-slip effect, and some have no foot cover. 2. How to read the parameters on the spectacle frame The representation methods of the spectacle frame include the box method and the reference line method, which are generally printed on the inside of the temples. This parameter is an important basis for processing glasses. "□" refers to the frame parameters represented by the frame method, for example: 50□19-14550: the size of the mirror ring is 5019: the size of the bridge of the nose is 19145: the length of the temple is 145 "-" refers to the reference line method to represent the frame parameters, For example: 50-19-145, the meaning is the same as above. β-TITANIUM: β titanium PURE TITANIUM: pure titanium frame parameters , without frame. (1) Full-frame spectacle frame: The entire frame covers the lens, which is characterized by firmness, better protection of the lens, and cover part of the thickness of the lens, which is the first choice for people with high myopia. (2) Half-frame spectacle frame: A thin groove is opened around the lens, and a thin nylon wire is used as the lower frame edge, so that the nylon wire is embedded in the groove to form a style without a bottom frame, which is light, unique and firm. (3) Rimless spectacle frames: This type of spectacle frame does not have a mirror ring, and the lens, the bridge of the nose and the temple are directly connected by screws, and generally need to be drilled on the lens for processing. Frameless is lighter, more beautiful, and does not obstruct the eyes. It is suitable for all skin tones and face shapes, but it is slightly less strong. Full-frame frame Full-frame frame Half-frame frame Frameless frame The main factors of price are brand, material, craft, design and so on. According to the frame material, it can be divided into metal, non-metal and natural materials. The components and characteristics of different materials are introduced below. (1) Metal materials Commonly used metal materials are copper alloys, nickel-copper alloys, nickel alloys, titanium and titanium alloys, and other precious metals. In addition to the above materials, metal frames also have other precious metal frames, such as pure gold and gold-silver-copper alloys, platinum, platinum and platinum, gold-clad frames, etc. The gold-clad frame is a layer of K gold outside the base metal to make it have the properties of gold. There are two ways to express the gold-clad frame: products with a weight ratio of gold and alloy above 1/20 are expressed by GF, and products below 1/20 are expressed by GP. Note: The metal frame is relatively slender, and friends with a degree above 600 degrees should choose carefully. If you really want to choose, you should choose a lens with a small frame and high refractive index, so as to avoid a heavy frame and light temples. 2. Non-metallic frames The non-metallic materials generally used to make eyeglass frames mainly use synthetic resins as raw materials, which are divided into two categories: thermoplastic and thermosetting resins. (1) Celluloid: Advantages: good plasticity, high hardness, and can be dyed in various colors. Disadvantages: easy to burn, easy to age, will emit camphor smell when rubbed. This material was used in the early days, but it is basically useless now. (2) Acetate fiber: Compared with celluloid, it is not easy to burn, and it is not easy to change color. The frame has a metal core. (3) Epoxy resin: light specific gravity, bright color, good elasticity and long life. Frames have no metal core. (4) Nylon (TR90): It has memory and is the most popular ultra-light frame material in the world. It has the characteristics of super toughness, impact resistance and wear resistance, and low friction coefficient. (5) Carbon fiber: Carbon fiber material is the lightest among all spectacle frame materials. Data tests show that carbon fiber of the same volume is 29% lighter than titanium frame and 1/3 lighter than metal. It is ultra-light, super-strong and wear-resistant. ,preservative. Non-metal frames can be divided into sheet frames and injection frames according to the processing technology. The injection frame is to soften the resin particles by heating, and then inject them into the mold for cooling. The injection-molded frame is a kind of frame that is very popular today. The resin sheet is turned, shaped and polished, and there are cutting marks on the temples. The process is relatively complicated and the cost is high. The gloss is better, durable, and the style is more beautiful. It is not easy to be deformed when worn for a long time. It is mostly used for medium and high-end glasses. Plate frame 3. Natural materials The natural materials used to make spectacle frames include tortoiseshell, special wood (sandalwood) and animal head horns (sheep horns, ox horns) and so on. Generally, wooden spectacle frames and horn frames are rare, and tortoiseshell spectacle frames are common. Tortoiseshell is mainly made from the shell of the tortoiseshell, which has been listed as a protected animal by the state and has been rarely used, and its value is very high. Rimless glasses, tortoiseshell legs, do you have a very comprehensive understanding of the frame by reading the above introduction? Maybe you can't remember that much, but you can have a general understanding. The most common glasses in optical shops are sheet metal and ordinary alloy frames. The high-end ones include titanium and titanium alloys, TR90, carbon fiber, etc. In addition to the frame, the choice of lenses is also very important. Next time, I will tell you how to choose lenses.

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