let can transfer it’s color darker under sunshine when absorbing 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 returnsnba wristbands to the original color. Photoreceptor products, after sunlight or ultraviolet radiation, 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. Plastic products, suitable for various kinds of plastic PP, PVC, ABS, silicone rubber and other materials, such as the ejection, out of shape. waterproof-wristbands-for-eventsevent-wristbands-walmart ogo for them and then they will duplicate the design and place them on the silicone wristbands for you. Some times this does cost extra however not on all of the web sites. This also depends on what web site you are choosing to purchase them from and the type of logo you want to be placed on them. For more information on Silicone Rubber Bracelets visit www.24hourwristbands.ca. Here you will find more articles and tips on marketing items as well as a Quick Quotes form where you can conveniently submit your request in one form and get responses from multiple suppliers so that you can find the best price and product for your marketing needs. images-of-rubber-band-braceletsclear-silicone-wristbands more than 100pcs , get 100pcs free. The free are of same design as ones you order. Besides, you can get 5-10pcs key chains. Larger amount, more favorable price. No MOQ, even 1pcs we will make. We are always strict in quality of our product focusing on edge cutting, polluted mark and printed logo to make a best product for you. Due to the prompt service of FedEx, UPS and DHL, we are able to make a 4 days order. Super rush order of 1 days production and 3 days shipping is available. It helps you achieve your promotional event. And we have ability to do internationalnba wristbands orders, only needs little international shipping fee extra. We are always on line for your order and inquiry, 24 hours a day, 365 days a year. You could contact us via live chat, hot line and email. If you place an order, you can pay it by PayPal, credit card or debit card. If you are not pay on line, we are able to send an invoice for which you can pay later. We will make and send you digital proof even it is just a quote. We will inform you the tracking number once it is ready. And we provide the best suggestion if order get stuck on the way. If you are not satisfied with our product or it gets delay, we will refund to you. Or if you need replacement of the defective wristband, we will also do it for you free. The business philosophy of responsibility and good faith ensure our service quality.