Corrugated paper

I can only agree with the critical voices.
Who can draw Aqualle with very little water, is right here. Then also fits the price-performance ratio.
As soon as you even partially moistened the leaves, you can forget about further work, because quite thin leaves curl. Annoying also that - when you have once taken a little more water, the leaves underneath are already pre-damaged.
When rubbing off of masking fluid is also fast times with detached scraps of paper.
So for practicing and sketching like the blocks make sense. Otherwise: rather invest a little more.