Which brand of offset printing ink is better?

Sun-resistant ink, also known as anti-ultraviolet ink, is specially used for outdoor labels or things exposed for a long time. Especially in the printing of commercial labeling machine, the ink layer is relatively thin. To meet the requirements of 8-level sun-fastness, I suggest you consider Yufeng soybean sun-fastness ink. At present, many customers require different sun-proof standards, but the testing standards are inseparable from UV lamp irradiation. Yufeng sun-fast ink does not fade after 300 hours of ultraviolet radiation.