SHENZHEN RONGDA INK, Built in 1996, located in SHENZHEN, China. 20 years experience make us being leading enterprise in PCB area. main products are PCB ink for all rigid board, etching ink for metal, photoresist for LCD,OLED,Touch play. Specialize in HDI, Multi layer, heavy copper double/single side etc. Totally meet request for military, aero-space, computers home electrics and so on. Let me know your request and I would like give you a satisfied answer. Looking forward to your email.