Product Name: Photochromic Pigment for Yarn Making Ultraviolet UV Photosensitive Color Yarn Structure: Ring Spun Yarn Coarseness: Fine Yarn Type: Spun Polyester Yarn Pattern: Dyed Number of Shares: Single Yarn Fiber Length: Continuous Filament Technics: Ring Spun Material: 100% Polypropylene Feature: Eco-Friendly, High Strength, High Temperature-Resistant, High-Elastic, Anti-UV Usage: Knitting, Weaving, Sewing, Embroidery Transport Package: Customise Specification: 2kg/roll Origin: China Product Description Photochromicpigment/ Photosensitive Materials1.Photochromicspigment2.ColorchangedbyUVlight/sunlight3.Recycledforunlimitedtimesbase Colour :Violet,Red,Blue,YellowPrinciple:Photochromicpigmentchangesitscolorwhenitisundersunlight.WhenunderUltravioletlightorsunlight,itbecomescolorful,purple,red,blue,yellowetc. WhenUVsourceisremoved,photochromicsreturntotheiroriginalcolor.1.What's your main products?---We focus on Photoluminescent material and other luminescent products. 2. Can I request samples ?--- In stock samples can be sent by free for quality test in 3 days and the OEM samples can be offered in one week. 3.Can you send me a sample ?Is it free ?--- Yes ,the sample is free , and you should share the courrier charge . 4.Can you accept OEM ?---Yes, of course .Any logo is acceptable. 5.Still can't find the answer ?---Please email us freely ,we will try to help 1.Fast actionwe will reply each client inquiry with 6hours 2. Profession ServiceFrom inquiry → make sample → start production →inspection → safety packaging → delivery 3.Good quality We have an own professional quality control team. Which ensure products to be in quality .Each of our clients never worry about quality . 4.Small quantity order We accept small order quantity and also keep lower price . 5.Cheap and fast deliveryWe have a big discount from our forward ,which can keep the goods reach to your side fast ,safety and economically