I have some question about photo paper
I use the following six kinds of photographic paper for research purpose.
1. Kodak - Premium Photo paper RC Satin
2. Kodak - Premium Photo paper RC Gloss
3. Kodak - High Photo paper High Gloss
4. Epson - Premium Glossy Photo paper
5. Epson - Premium Semigloss Photo paper
6. Epson - Photo Paper Glossy
How can I know what kind of coating (swellable / porous) this photo paper is?