I was considering using some of that amazing stuff for this piece, but I've already used it quite a bit already. I find that its a bit of a one trick pony, and I really want to capture the wonderful simplicity of the 2 dimensional magnetic field - and work chemistry into it.
I've decided I'm just going to go for the sulphuric acid and iron filings to make iron sulphate.
I've ordered 1L of 98% sulphuric acid which I realise is a excessively huge and concentrated amount for my needs but was the smallest quantity I could get at the time.
Does anyone have any suggestions for what concentration of sulphuric acid I should use, and how I should apply it to the iron filings (pipette?)