I have long been wondering whether the coarse salt crystals that I've often used to produce a variety of effects with watercolours would work with black Quink ink. A couple of days ago, I decided to try.
The answer is that I think they do, up to a point. The effects seem to show up more clearly when the ink is less concentrated. Coarse crystals definitely worked better than fine ones. My results using the latter weren't worth showing.
Sometime soon, I'll try this technique with blue and blue-black Quink. I'm expecting similar effects, though in my experience, these two colours don't split into their different colours in such an interesting way.
For those interested, the ink effects were produced in a similar way to my post of last week here. This time, I made sure that the surface was very wet, added extra ink with a dropper and then added the salt crystals, leaving everything to dry on a flat surface.