Fogging by sulphide toner

Hello,
I've read Tim Rudman's book on toning and he cautioned about hydrogen sulphide fogging. How much do I need to put away paper in film is necessary? In a bag in a box or what?
thanks in advance
charlie

Not only is hydrogen sulfide a powerful fogging agent it is also very poisonous. Do your toning outside of your darkroom preferably outside or in a well ventilated area.