Whats the difference between student grade and professional grade when it comes to buying paper?
Student grade paper is almost always made out of wood pulp, which means it will yellow over time. Paint on the surface of cheap paper behaves very differently from paint on the good stuff. The good stuff is 100% rag fibers and treated with a gelatin-like surface material that almost paints itself. Watercolor is one art where it pays to pay more for your materials up front, because your efforts will be so much more rewarding.
