Originally Posted by retinax
Oh wow I certainly won't use that, badly ventilated darkroom and prints will be stored in my bedroom.
You might find you need the hardener. If you don't use it but the emulsion washes off during processing, you know you need to add it. The formalin won't outgas after it is mixed with the emulsion, and it will be long gone by the time the prints are dry. Just take care with the liquid before you add it to the liquid emulsion.