Your image might not develop at all. If your developer has been contaminated by fixer you should discard the solution and mix up fresh before developing your film. Fixer is acid. Developer is alkaline. All other things aside, the acid in fixer will neutralize at least some of the alkali in developer, causing the developer to slow down or stop working altogether. Your image would either be underdeveloped (at best) or not developed at all.As an aside, one reason for using a mildly acid stop bath between the developer and the fixer is to neutralize the alkali in the developer before it's carried into the fixer. This will make your fixing bath last longer.
fixer has contaminated the developer
In Fixer you can find Sodium thiosulfate :Na2S2O3·5H2O and Ammonium thiosulfate: (NH4)2S2O3 for black and white photography, in purpose to remove unexposed silver halide.They can not be found in developer ! In Developer for black and white photography: Metol,Phenidone and Hidroquinone for purpose chemical that makes the latent image on the film or print visible!
yes
The chemical on the paper will be fixed and wont develop.
developer-brings up the image stop bath-halts the action of the developer fixer-clears image and makes it permanent//no longer sensitive to light
To prevent oxidation of the solutions and escaping fumes
You must use fixer. If you don't, the undeveloped silver halide will remain in the film, and you won't be able to get light through it--hence the negatives will be useless.
Depends what kind of print you are developing. For a black and white print, you typically use developer, stopbath, and fixer.
fixer
No, it is not a nitrogen fixer.
Fixer Chao was created in 2002.