Even though matte and glossy photographic papers make your art prints look very different, they actually don’t differ much in the way they are manufactured…
Actually, the photo finish manufacturing process of matte and glossy photographic papers is pretty much the same. You might find that astonishing because matte and glossy papers look very different and also feel very different to the touch.
But fact is glossy paper has the same chemical coating as matte paper. It’s just that glossy paper has more of that coating applied to it than matte paper.
This extra layer of resin coating is what brings about the different surface qualities of glossy and matte photographic papers.
Although the surface of matte finish papers looks smooth to the eye, it has a slightly grainy texture compared to glossy paper. This unevenness gives the surface refractive properties. That means all light that hits the surface is scattered in different directions.
Glossy papers work just the opposite way. The glossy finish is designed to be as shiny as possible. The additional layer of gloss doesn’t absorb light at all but reflects all light off the surface. It’s non-refractive.