First of all, let me adress the fact that this, like most coloured fires, involves some chemicals that are not very good for the enviroment. So only small quantities were used (and only small quantities are needed, it's quite strong stuff)
That said the substances used are not thát dangerous or poisonous. More like a 'maybe-you-should-wear-gloves' or a 'try-not-to-get-it-in-your-eyes' kind of poisonous.
The main problem is that they are quite corrosive. (see later)
I know green fire has been done before, but mostly with Heet and Boric acid. Not much people have used Copper Chloride. Besides, it is mainly blue fire (see last step).
This instructable is mainly a response to The Green Gentleman's 'Spirit Lantern' since it provides an alternative fuel that doesn't produce the white smoke that settles onto everything.
I made the candle with a test tube so it fits in a candle holder, but of course it can be used in his lantern. However, the main additives and combustion products are a bit corrosive and that perhaps requires some modifications.
And perhapse also a response to The Real Elliot 's 'Better etching solution' instructable since this is the etching method I used.
However it is not a way of getting rid of the waste. Since I used very, very small quantities.
Besides some complications and restrictions because of the corrosivity it is pretty basic and the result is a nice colourful flame.