uv marker: also named invisible marker, used for quality control processes, tamper checks, tagging, ownership, anti-counterfeiting and much more secret markings in textile industry, the fiber tipped marker writes on virtually any nonporous surface including plastic, glass, metal etc. the ink performs smell-less and colorless, markings are invisible but illuminates blue under a black light. several nib sizes available: 0.5mm, 0.8mm, 1.0mm, 2.0mm. shanghai kearing stationery co,. ltd is the specialist and leading manufacturer in this field in china, and she is a high technology products manufacturer confirmed and awarded by shanghai science & technology committee. all our professors are from universities in shanghai,and we researched and produced the ink by ourselves successfully. kearing textile marker has been selling well in both domestic markets and international markets for their top quality and best price kearing markers have been exported to east-south asia,japan,america,europe,south africa etc. welcome international distributors and sales agencies to join us you can also visit our web site: www/kearing/com or : export/kearing/com for more information.