Daylight dev Tank- developing film.

top paragraph sourced from wiki.
A developing tank is a light-tight container used for developing film. A developing tank allows photographic film to be developed in a daylight environment. This is useful because most film is panchromatic and therefore can not be exposed to any light during processing. Depending upon the size and type, a developing tank can hold one to many roll or sheet films.

The steps to using one properly.

1. Open the film canister(35mm)
2. Then load the film onto a film reel in a completely dark enviroment, (so the images on the film arent destroyed). This could be a light tuight room or a changing bag? This is a vital step, not to be mesed up so take care!
3. Once the film is on the reel you put it into the developing tank, sealing the lid properly once in. Make sure to seal it properly as it prevents light from getting in to the tank.
4. Now the lids on the sealed tank with film in, the rest of the procedure can be carried out in daylight. In addition to protecting the film from light, the lid contains an opening for rapidly pouring liquids into and out of the developing tank. Finally, a separate cap seals the canister, which prevents the contents of the tank from spilling when agitated by inverting the tank.
Finally, rember to clean the tank with water every time after development because any left over residue fix may lead to not developing the film properly next time.