Hypo is used in photography it is a solution of Sodium thio sulphate, Na2S2O3
Sodium Thiosulphate was originally called Hyposulphite of Soda and Hypo is simply the short form of this common name still in use. The origin of this term is uncertain. However, Hypo is the Greek word for 'under' and if you take a look at the structure of sodium hyposulphate you will note that the sulphite ion (SO3-2) is bonded to a sulphur atom ( as in replacing an oxygen atom of SO4-2 with a sulphur atom- thiosuphate). For purpose of symmetry, the structure of thiosulphate is drawn with the sulphur on top and the sulphite 'under' the sulphur. Hence the term hypo. Read more at related link.
One example of a hypo-tonic solution used in intravenous infusion is 0.45% saline, also known as half-normal saline. This solution has a lower concentration of salt compared to the normal concentration in the body, making it hypo-tonic.
Hypo sludge, also known as paper mill sludge or paper-making waste, is a byproduct of the paper industry. It is a mixture of water, chemicals, and residual fibers left over from the paper-making process. Hypo sludge can be used in various applications such as construction materials or as a soil conditioner.
Aluminium hydroxide is not typically used in photography. It is commonly used in antacids, vaccines, and as a filler in paper production. In photography, chemicals like silver halides are more commonly used in light-sensitive materials.
In much the same way as sound is used in music, food is used in cooking, and soil is used in agriculture.
hypo
Hypo is a reducing agent when combined with Na.
Sodium Theosulfate AKA Hypo is one form of fixing agent
due to its reducing ability
It reacts with water and a base called a hot aqueous alkali.
A hypo tray is a tool used in darkroom photography to process film. It is a shallow tray that is filled with chemicals such as developer, stop bath, and fixer to develop film. The trays are typically arranged in a specific order to allow for the step-by-step processing of film.
To prepare a hypo solution, dissolve sodium thiosulfate in water in a ratio of 1 part sodium thiosulfate to 5 parts water. Stir until completely dissolved. This solution is commonly used in photography to stop the development process.
Sodium thiosulfate is called hypo because it was historically used as a photographic fixer, which removed unexposed silver halide from photographic film. The term "hypo" is short for "hypo-sulfite," indicating its chemical composition.
Polonium is not used in photography.
The word 'hypo' is normally used colloquially as a shortened form of 'hypoglycemia', the medical term for low blood sugar levels. The prefix 'hypo' is frequently used in scientific contexts and derives from the Greek for 'below' or 'under'.
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Sodium thiosulphate (sulphate contains 4 oxygen atoms, thio-sulphate has one of these replaced by a sulphur atom). Dissolves away unexposed silver salts from photographic film or paper.