https://omkarpaper.tumblr.com/post/642632527184560128/what-is-printing-paper-supplier

The coating has micro pores or nano pores.Stylish Micro Coating Paper and Sunmica Paper from Omkar Paper. We have a good quality and the best design of Sunmica papers on a wide range. which are silica or alumina based (rare these days due to high cost). … The microporous coating will provide a better colour definition with a deeper, more solid black than the cast coated paper.