Qingdao Landfinder Advanced Materials Co., Ltd. is currently the only one production enterprise to produce EL-level photosensitive material.
Qingdao Landfinder Advanced Materials Co., Ltd. is currently the only one production enterprise to produce EL-level photosensitive material. Our products, such as1,2-Naphthoquinone Diazido-4-Sulfonic Acid Sodium Salt（NAS-4）,1,2-Naphthoquinone Diazido-5-Sulfonic Acid Sodium Salt (NAS-5),1,2-Naphthoquinone Diazo-4-Sulfonyl Chloride (NAC-4), 1,2-Naphthoquinone Diazo-5-Sulfonyl Chloride(NAC-5), and the naphthoquinone diazide Photosensitizer, are photographic materials mainly for the printing area. At present, we are the only Chinese company capable of producing NAC-5 and NAC-4 of EL level which are used in high-technology fields as LSI and LCD. We also produce products used for CTP plates, such as photothermal conversion agent, phenolic resins, acrylic ester copolymers, and coating compositions sensitive to light or heat and for FPC circuit boards, TAB and other micro etching of positive photoresist. We have modern laboratories with advanced devices as atomic absorption spectrometer, UV - visible spectrophotometer, HPLC, GPC and so on. Using the advanced analysis and test method, we can realize the effective analysis and monitoring of products.