UV light. It transfer to purple or blue normally which indicating the strength of the UV index. Wearing it on the wrist is a good way to avoid long time staying under strong sunshine. We add UV powder which is also green as silicone in production. The UV powder is kind of photochromic material. We use it to make this change. Photoreceptor color is irradiated by ultraviolet or sunlight, absorbs ultraviolet or sunlight, and produces changes in color. When it loses ultraviolet or sunlight, it returns to the original color. Photoreceptor products, after sunlight or ultraviolet rahow to make cool rubber band braceletsdiation, can absorb the energy of the sun or ultraviolet rays, produce changes in the molecular structure, lead to changes in the absorption wavelength, and produce color changes; when the sun or ultraviolet energy is lost, the original molecular structure is restored and the color of the cost is reduced. Application of photosensitive discoloration material: coating, suitable for various surface coating products, including PMMA spray paint, ABS spray paint, PVC spray paint. Ink, printing of various materials, including fabric, paper, synthetic film, glass, etc. Plastihow to make cool rubber band braceletsc products, suitable for various kinds of plastic PP, PVC, ABS, silicone rubber and other materials, such as the ejection, out of shape. custom-camo-silicone-wristbandscool-silicone-wristbands In the past, patients with type I diabetes usually injected insulin to control blood sugar concentration. But it is difficult to control the dosage of insulin injection, which often leads to the instability of insulin concentration in blood, brings pain to patients, and also affects the therapeutic effect. Experts have invented an instrument linked to a silicone diabetic bracelets. When a patient wears a silicone diabetic bracelets on his wrist, insulin in the silicone diabetic bracelets slowly releases, thus achieving the goal of balanced and stable reduction of blood sugar concentration. It is said that the silicone diabetic bracelets therapeutic instrument has passed animal experiments and the first phase of clinical trials, which proves that it can indeed reduce blood sugar concentration in type I diabetes mellitus patients. african-rubber-braceletssilicone-bracelets-custom-cheap-canada Slap wristband is other of silicone wristband, it is also an important promotional gift. We not only make normal silicone wristband, but also make is high quality silicone slap wristbands. It is soft and environmentally friendly in and loved by people. Its surface is high quality silicone, embedded in thin steel bars, so it can be modified and restored. When we hit the slap wristband on the wrist, the steel bar is forced and deformed and curled, so it is very convenient to wear on the wrist. It area is relatively large, so we can print more content on it, playing a propaganda effect. Generally, the size of the slap wristband is 230*25mm and 215*25mm. The color can make all pan tones. It can be solid, segment, swirl, glowing or UV transfer. As there is a steel bar inside, we usually make the logo and message printed style, one or mutil colors. Welcome to order slap wristbands.