The entire collection is made up of 24 different colours with the basics and a few different tones for each colour. In my opinion the pencils are a bit waxy and in the piece I did they didn't blend as well as I would have liked but that might have been more to do with the surface I was working on rather than the pencils themselves.
Another thing I'd mention is, unlike the Derwent Inktense which once dry will stay that way, these can be worked back into once the wet colour dries but it does also mean you can't really work back into it with more wet colour without disrupting what's underneath.
Here is an example of a sketch I did, the pencils are left dry and are on a 5 x 7 inch canvas board.
And here is a colour palette I did, I did the pencil dry and then at different levels of thickness to show tone and then labelled them as you can see.
If you want to buy these Aquatone pencils you can here
US Derwent Aquatone Woodless Watercolor Pencils, 7mm Core, Metal Tin, 24 Count (0700174)
UK Derwent Aquatone Sticks Assorted Tin 24
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