I only have dye-based inks and this class was an eye-opener about how shellac inks differ in consistency and flow. Though I suspect the more significant difference is in the skill and experience of the person using the inks :-)
If I get hold of some shellac or acrylic inks I'll try the knife exercise again and see what the effect is.
The lettering sessions were good for brush control and managing ink quantities.
I used a variety of paper, and fortunately had some sample of hot pressed watercolour paper to try out. I was surprised at just how much water it could take, I seemed to vary between leaving it too dry and having a puddle!
I started taping the sheets down after trying the abstract technique - the paper bowed and all the ink tried rolling off the page :')