I'm in year 10 at a school here in Melbourne and we've been given pretty much free choice over what to do for this semester's research project. We were encouraged to do something that interested us so I immediately thought of photography and then development of film. I have decided I will do something to do with different quantitieis of developing agents in a film developer. I can then carry out everything the same (agitation, times, film and subject, printing and analysis) and just change the quantity of metol or hydroquinone... I'm just wondering if I can get some advice on where to start with regards to which formula i should use and what quantity increments to go by.. how much more or less than the "recipe" before i'll notice any great difference. THanks a lot in advance for your help. Will.