Titanium metal has good corrosion resistance, similar to platinum (commonly known as platinum), its excellent mechanical properties, lightweight texture, unit weight is only 48% of the general metal, so titanium is the ideal material for spectacle frame, because it has unparalleled light, elastic, corrosion resistance, etc.. However, the production cost of titanium and titanium alloy glasses is high, and there are special high requirements on cutting, stamping, welding and electroplating (for example, welding must be completed in vacuum), so the price is relatively expensive.
With the development of titanium materials and the increasingly mature processing technology, the market has appeared pure titanium, B titanium, memory titanium and other titanium based frames. Among them, the purity of PURETITANIUM frame is required to reach 99.9% (excluding gaskets, screws, brackets and leg covers), and its logo is fully called PURETITANIUM, or ti-p, etc. But individual manufacturers in the interests of some non-pure titanium or titanium alloy materials also carried out the above logo, coupled with the majority of consumers of pure titanium frame identification ability is insufficient, resulting in consumers wearing titanium frame rust, skin allergy and other phenomena, damage to the interests of the majority of consumers. Here are a few simple ways to identify pure titanium glasses.
1, Weigh it by hand.
Usually the specific gravity of alloy frame is about 8.9g/cm3, pure titanium frame is about 4.5g/cm3, because the weight of titanium material is equivalent to half of the alloy frame, hand weigh in hand is relatively light. This is one of the easiest ways to tell a titanium frame from a non-titanium frame.
2,Observe the welding points of nose bracket stem and nose bracket bucket.
The welding of pure titanium material is vacuum oxygen-free bump welding, where the welding marks are "step" shape, and the welding of alloy material is spot welding, and the welding marks are "slope" shape. This is one of the effective methods to distinguish titanium frame from non-titanium frame.
3,Observe whether there are gaskets at the joint of the hinge, pure titanium frame should not make direct contact between titanium and titanium at the hinge part, otherwise it is easy to wrinkle at the joint and the tension of the mirror leg is not smooth. Two thin gaskets are usually inlaid at the hinge part of the pure titanium frame to separate the upper and lower hinges. Therefore, check whether there are gaskets at the hinge, is also a good way to identify whether pure titanium frame.
4,Use magnets to make magnetic reaction, loosen the hinge of the frame as far as possible, and attract it with magnets in the state of free movement. If the mirror leg shakes under the attraction of the magnet, it indicates that the frame is not pure titanium, otherwise, it may be pure titanium.
Other titanium frames and titanium alloys are marked as follows:
Pure titanium for frame + braket Titan-p or Ti-Ppuretitanium
Pure titanium for frame front-Titan-p or F-Ti-P
Titanium alloy for frame + frame Titan-c or Ti-C
Titanium alloy for frame front-Titan-c or F-Ti-C
Titanium alloy for mirror foot temple-Titan-c or T-Ti-C