Kim, thanks for comments. I don't like this gray paper at all for wet media. I can't use paint on it. I'm hesitant to use watercolor paper because when I paint, I make a lot of mistakes and I do many sheets for practice on one pose and if I do that, it will costs me a lot to practice if I pull a 140 lb Arches paper every time. I've used a variety of 90-130 lb watercolor paper but the black sumi ink just pools whenever I use a Chinese brush. It's a pain. That's why I'm more and more into mixed media. Ink work first and then put dry media on top. The gray paper could take at least the Chinese ink without warping and that's why I use it for practice when it's more straight ink and no wash.
Posted some monkey practices here
on rice paper. If you do Chinese painting, Kim, post some of your studies at that thread too. It's very lonely over there by myself.