Provide adequate ventilation by opening windows and doors and/or turning on a room fan.
Wear protective clothing such as chemical resistant gloves, eye protection and long sleeves.
Carefully pour the diluted solution slowly down the sink, flushing with large amounts of water and taking care not to splash. If the chemicals are unused, they should first be diluted according to the usage directions on the package. Failure to dilute unused concentrated solutions may seriously damage pipes or other parts of your plumbing.
Continue disposing in batches until completely gone. Don't mix products, and wait several hours between disposing of different types of products.
The best time to do this is during the working day when the sewage system is in full use so that this material passes through the municipal sewage system faster.
If your home is connected to a septic tank, give these products to someone who is connected to a municipal sewer system. Even in a diluted form, these chemicals can destroy the bacterial action in your septic system and drain field.
These procedures are intended for small quantities of photographic developer and fixer from a household only.