Generally speaking, there are two main chemicals used in b&w film, and a couple of auxiallry chemicals. The primary chemicals are developer, which causes the silver iodide of the film or paper emulsion to darken if it has been exposed to light, and fixer, which removes the undeveloped silver iodide from the emulsion. A chemical used to completely stop the development process is called stop bath, and is used between the developer stage and the fixer stage in both b&w film & paper processing.
Other chemicals, like hypo clear is used to remove all traces of the fixing agent & rinsing agents to reduce stopping during the drying of film. These reagents (chemicals) are not used in enlargements or paper process.
Black & White developers vary in chemical composition and produce variations accordingly but are generally separated into subcatagories based upon grain quality . . fine grain developers reactions generally are slower.
When working with color, the developer is often split into two different chemicals, one which develops the primary (black and white) image, and another that develops the color layers. This is done via color couplers and as such is sequential in the developement chemistry,not as a b&w developer except in some applications of slide processing.
A photo lab is a dark room where photos are developed. It has many chemicals that develop the photos.
Light sensitive photographic paper.
Dark bottles are used for chemicals sensitive to UV or some visible light.
Tongs are used in a dark room so that the liquid will not spill or get on your clothes. Another reason tongs are used is so that the pictures are easy to handle and won't get messed up during development.
Hazardous is easily used in a sentence. The chemicals spilled were hazardous to the people in the room.
Your pupil's have to adjust from the light to the dark so your pupils will get bigger in a dark room.
It depends on however big the room is
The room was dark.
If you just have methane in a dark room nothing will happen because nothing is there to react. If the room was light nothing would happen either, as there are still no other chemicals for it to react with.
Dark Room - album - was created in 1980-06.
Our eyes are not able to see anything in a dark room because in a dark room everything is seemed to be black. So as a result we can see nothing in the dark room
pupil becomes short when we go from dark to light room