Common eyeglass mart frames can be mainly divided into plastic frames (including natural materials), metal frames and mixed frames according to material.

1. Plastic frame: It is characterized by: light weight, not easy to allergy, popular with the elderly and children, and now it is also used as the choice of sunglasses or decorative mirrors by fashion people.

At present, the plastic frames are mostly double frames made of acetic acid resin, that is, the use of laminated plastic, the thin layer of a color of plastic pasted on another layer of thick plastic, thick materials are mostly transparent (or transparent) color, there are also three or more layers of plastic made.

Natural materials used to make spectacle frames include tortoise shell, special wood and animal horns. Tortoiseshell frames are common.

Hawksbill turtle materials are produced in the tropical ocean as raw materials, the main origin is the West Indies. Its advantages are light weight, beautiful luster, no stimulation to the skin, durable with preservation value, very popular middle-aged male wearers. The disadvantage is that it is relatively easy to break, but it can be bonded and repaired after breaking. Do not use ultrasonic cleaning when using maintenance, otherwise it will be white and lose luster. Since hawksbill turtle is a prohibited animal in the sea, the production is not large and the price is expensive.

2. Metal frame: It is characterized by: strong, lightweight, beautiful, novel style and wide variety.

The material of the metal frame is made of a certain metal material or alloy, mostly copper alloy as the substrate, and then the surface treatment is processed, often gold-plated, or white or titanium plated with rhodium or palladium. Due to different electroplating processes, some are easy to fade, and some are not easy to fade. In addition, there are frames made of pure titanium, and frames made of memory alloy.

Metal frames are basically equipped with nose brackets, and the nose brackets are movable in order to adapt to various nose shapes. The end of the mirror foot is often covered with a plastic sleeve, which is not only beautiful, but also plays a role in protecting the mirror foot and skin.

3. Mixed material frame: It is characterized by: exquisite shape, beautiful, giving a sense of elegance, because the outer plastic is in close contact with the inner metal material, it is not easy to burn, increasing the strength of the frame.

The material of the mixed material rack is mostly made of metal and plastic. Some of these frames are plastic wrapped in metal; Some use different materials in different parts of the frame, that is, the front frame is plastic, the mirror foot is metal, or the front frame is metal, the mirror foot is plastic; Some use a mixture of the above two methods, such as the use of plastic brow and nose bridge, the frame of the mirror with stainless steel material, the mirror foot with plastic wrapped in metal material.

Second, the common frames are mainly full frame frames, half frame frames, frameless frames, eyebrow frames, combination frames and folding frames according to shape.

1. Full frame frame: The full frame is the most commonly used type of frame, characterized by firm, easy to shape, and can cover a part of the lens thickness.

2. Half frame frame: half frame is made of a very thin nylon wire as part of the frame edge, the lens is special grinding to smooth its lower edge, there is a narrow ditch in the lower edge, so that the nylon wire is embedded in the ditch, forming a pattern of no bottom frame, characterized by light weight, giving people a sense of lightweight and unique, but also more firm.

3. Frameless frame: no frame no mirror ring, only metal nose bridge and metal mirror feet, lens and nose bridge and mirror feet are directly connected by screws, generally to punch holes on the lens. No frame is more lightweight and chic than ordinary frames, but the general strength is slightly worse than the full frame.

4. Eyebrow frame: eyebrow frame is similar to half frame, the upper half frame only has a circle wire similar to the eyebrow, with a very thin nylon wire as the lower part of the frame edge, the style is relatively fashionable.

5. Combination frame: There are two sets of lenses at the front frame of the combination frame, one of which can be turned over, usually for indoor and outdoor dual use.

6. Folding frame: The frame can be folded into four or six folds, mostly reading mirrors.