Ferric Nitrate

[Silverae]

Hi everyone,
I'm new to the forum and still looking about and getting my bearings but i keep seeing people talking about doing etching and i'd love to have a go.
Where do I buy the ferric nitrate? I've been in touch with cookson and they say they don't sell any etching products, though i think they sell the 'stop out' but they didn't advise who does sell it. Is it difficult to get hold of in the UK?

I've found it thought with cookson not selling it it must be tricky to get hold of but it seems not

[BarryM]

I bought mine from tools4jewellery.co.uk, 250grams for £12.89