I teach a beginner botanical watercolour class at the local art centre twice a year, and I start every session the same way: I hand everyone a sheet of cheap cellulose paper and tell them to paint a leaf on it. The groaning is predictable. But I want them to feel what bad paper does before they ever touch the good stuff. I want them to experience the buckling, the pilling, the muddy washes that happen when the sizing fails. Because until you've fought a losing battle against a sheet of Canson student-grade, you don't really understand why you're paying for Arches. It's the same reason I still keep a block of that wretched paper in my own studio. Every few months I pull it out and paint a study on it, just to remind myself. It keeps me honest about technique. You can't fudge your way through a wash on paper that won't hold it. You have to be deliberate.
