I found this little experiment to be worthy of note. I have frequently used Yupo - primarily with alcohol inks and watercolor. However, I was curious to experiment with watercolor ground on Yupo. On the right-hand side below, I used watercolor ground over Yupo. The effect of the ground can be seen as it creates a slightly rough surface that mutes the color.
The advantage of using a ground is that it can turn any surface (i.e. glass, plastic, etc.) into a surface over which watercolor can be used. I decided that in this case, I preferred the raw Yupo to the ground-covered surface. See what you think...
Click on the painting to explore the details.
3" X 5"
watercolor on both Yupo and Watercolor Ground