Just use some solvents to remove rust, such as rust removal solvents for bathrooms and kitchens, which are sold in supermarkets.
Generally, it doesn't matter, and it has no effect on the body. The glasses frame you choose should be made of metal, which usually happens when you wear glasses for a long time.
There are many kinds of frame materials, which one is the best?
According to the different material combinations and processing systems, frames can be divided into:
1. plastic frame: it is characterized by light weight, easy processing, no deformation at room temperature and generally low price.
2. Metal frame: characterized by firmness, lightness and beauty, it is the most commonly used frame at present.
3. Mixed frame (plate): made of metal and plastic, it has the firmness of metal frame and can be easily processed into various shapes.
4. Picture frame: bottomless frame with nylon thread embedded in the bottom of the lens.
5. frameless: frameless, only with the bridge of the nose and the angle of the mirror, more elegant.
Introduction of spectacle frame materials [turn]
There are three main types of frames: non-metallic natural materials.
nonmetal
Nonmetals include celluloid, cellulose acetate, epoxy resin, carbon crystal, etc.
Celluloid: It has been used as a material for glasses for a long time, but now it is rare. Celluloid burns easily. In addition, the old celluloid frame will shrink after baking and heating. It was widely used to make spectacle frames 30 years ago.
Cellulose acetate: Compared with celluloid, cellulose acetate is not flammable. Most chemical racks are made of this material. According to the processing method, it can be divided into injection molding and plate rack (milling rack).
Injection-molded frames: low cost, rough seams, used for low-grade sunglasses frames (hot processing and manufacturing).
Plate frame: formed by cold working, fine workmanship, good quality and durability.
Carbon crystal frame: characterized by high strength and firmness, but the material is brittle and easy to crack after impact in winter. The way to distinguish the carbon crystal frame is: the temples are made of iron and the surface is painted.
Epoxy resin: light specific gravity, bright color, good elasticity and long service life. Epoxy resin was first developed by European optical company, which is mainly used to manufacture racks of well-known brands such as CD and Dunhill. The way to distinguish epoxy resin is that there is no core at the temples, while the acetate frame has a metal core. In addition, the epoxy frame is brightly colored.
metal
White copper: (called copper-zinc alloy): The main components are copper 64%, zinc 18% and nickel 18%.
This material is the cheapest and easy to process. Electroplating is mainly used to make hinge support lines, small pieces and low grades. Most of our company's mirror frames in 200 yuan, such as 100 set of mirrors, are made of white copper.
Monel: Nickel-copper alloy, with nickel content of about 63% and copper content of about 28%. In addition, there are a few other metals, such as iron and manganese, especially: corrosion resistance, high strength and firm welding. Most of Sasaki hangers, wild hangers and other mid-range hangers distributed by our company are made of this material, and a few people are allergic to nickel leather.
High nickel alloy: the nickel content is as high as 80% or more, mainly including nickel-chromium alloy and manganese-nickel alloy. High nickel alloy has better corrosion resistance, in addition, the elasticity of the material is better than Monel, and some imported racks and domestic racks use this material.
K gold frame: generally, it is 18K gold, which means that the content of pure gold 24K in the frame is 18/24. If it is 750/ 1000, it means that the content of silver, copper and other substances is 250/ 1000. 18K gold glasses, if the weight is 40g, the gold content is18 ÷ 24x40 = 30g.
Gold-plated frame: the process is to add solder or directly mechanically bond between the surface metal and the substrate. Compared with electroplating, the metal layer on the surface of the coating material is thicker, which also has a bright appearance and good durability and corrosion resistance.
Representation of gold number: According to the regulations of the International Precious Metals Conference, products with the weight ratio of gold to alloy above 1/20 are represented by GF, and products below 1/20 are represented by RGP.
Titanium and pure titanium frames: the specific gravity of titanium is only 4.5, which is very corrosion-resistant and twice as strong as steel. It is called "space metal" and has no metal allergy. In the early stage, titanium alloy was difficult to cut and weld. With the development of technology, these problems have been gradually solved in the Japanese market, and titanium has become the mainstream. In the European and American markets, titanium mainly comes from Japan, 1996 90% of the world. Titanium frames are generally expressed as Ti-P or Titan, which are basically made of titanium except for supporting wires, hinges and screws. Ti-C indicates that a part of the frame is titanium.
NT shape memory alloy β -titanium material
NT alloy: It refers to a new alloy composed of nickel and titanium according to the atomic ratio of 1: 1, which is 25% lighter than the general alloy, has the same corrosion resistance as titanium, and has excellent elasticity.
NT alloy: It shows shape memory below 0℃ and high elasticity between 0-40℃. NT alloy has no metal allergy and is suitable for leisure sports glasses. When forming NT alloy, the heating temperature needs to be slightly higher.
Titanium material: refers to a special alloy formed by mixing pure titanium with metals such as nickel and chromium (accounting for 30%). The ultra-light and super-elastic frame can be made very thin. This metal has no metal allergy and will be more developed and popularized in the next few decades.
Natural materials
Tortoise shell frame
Tortoise shell is the name of a turtle that lives in tropical waters. Its main component is protein, accounting for about 90%. In addition, it contains about 10% water. Because it contains moisture, it can be softened at about 80℃ and is easy to process. The composition of the tortoise shell is similar to human skin and nails, so it looks elegant and generous, with a unique sense of transparency and colorful markings. In tortoise shells, the lighter the color, the higher the value, because the lighter the color, the more concentrated it is in the belly of the tortoise. After the turtle shell is broken, it can be repaired by bonding. When displaying goods, you need to put some water beside it to prevent it from drying.
In addition, the tortoise shell frame must not be cleaned by ultrasonic wave, otherwise it will turn white and lose its luster. Since the Washington Convention on the Protection of Endangered Animals was signed, the whole world has banned the capture of hawksbill. At present, most of the products sold in the market are old products, and their value will increase year by year.
Other information:
1. Zinc white copper contains nickel 18%, specific gravity: 8.78, containing Cu 64, Ni 18, Zu.
18 ternary alloy.
Features: (1) Easy to cut, weld, polish, punch and electroplate.
(2) Because of its elasticity and anti-erosion function, it is usually used as the basic material of glasses, such as thick feet, nose bridge and eyebrows.
2. Stainless steel: specific gravity: 8.0, containing 12- 18% yellow component, which is an extremely corrosion-resistant steel. It can resist the corrosion of nitric acid and common organic acids, but it can't resist the corrosion of hydrochloric acid, so nickel is added to achieve the strengthening effect.
3. Titanium-titanium frame has the following types:
A) Pure titanium gold: specific gravity: 4.5. Because it is a kind of high-quality metal with light weight (only half of zinc-white copper) and corrosion resistance, it needs a more difficult process than making ordinary spectacle frames in the process of material fastening, stamping, cutting and surface coloring.
Recently, many countries such as western Europe have nickel allergy. Pure titanium spectacle frames are completely nickel-free and will not cause allergies, so they are very popular in the spectacle market. In fact, titanium is also widely used in manufacturing aviation parts such as airplanes and rockets.
B) Titanium alloy: The microstructure of pure titanium gold is α type (hereinafter referred to as A type) at room temperature, but it will be transformed into β type (hereinafter referred to as B type) when heated at a high temperature above 880 degrees. Titanium alloy is made by adding other kinds of metal elements into pure titanium gold to make four kinds of titanium alloys: A type, B type, a+B type and aB type.
C) memory titanium gold: also known as NT alloy. This is an alloy mixed with nickel and titanium gold. The weight ratio of the two is 55%: 45%. NT alloy is very light (about 25% lighter than general titanium alloy) and has strong corrosion resistance.
D)β titanium gold /b titanium gold: it is one of the above titanium alloys, and its composition is about 25% of pure titanium gold, platinum, aluminum gold and other metals. Because its composition is synthesized by several metal elements and its material structure is β-type, it is also called B titanium.
Features: 1. Strong elasticity, light weight and strong corrosion resistance.
2. Because it is a high-quality metal, like pure titanium gold, processing requires very difficult technology. Because the screws of that frame are made of metal copper, in the process of sweat erosion, basic copper carbonate is produced, which is green and commonly known as copper rust. I basically agree with the answer "I love my heart":
The screw of that frame is made of copper, which is oxidized by air in the process of sweat erosion to produce basic copper carbonate, which is green, commonly known as copper rust, also known as malachite green.