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  2. Stop bath - Wikipedia

    en.wikipedia.org/wiki/Stop_bath

    Stop bath. Stop bath is an acidic solution used for processing black-and-white photographic films, plates, and paper. It is used to neutralize the alkaline developer, thus halting development. [1] Stop bath is commonly a 2% dilution of acetic acid in water, though a 2.5% solution of potassium or sodium metabisulfite works just as well. [1]

  3. Piranha solution - Wikipedia

    en.wikipedia.org/wiki/Piranha_solution

    Piranha solution, also known as piranha etch, is a mixture of sulfuric acid ( H2SO4) and hydrogen peroxide ( H2O2 ). The resulting mixture is used to clean organic residues off substrates, for example silicon wafers. [1] Because the mixture is a strong oxidizing agent, it will decompose most organic matter, and it will also hydroxylate most ...

  4. Neutralization (chemistry) - Wikipedia

    en.wikipedia.org/wiki/Neutralization_(chemistry)

    Neutralization (chemistry) Animation of a strong acid–strong base neutralization titration (using phenolphthalein ). The equivalence point is marked in red. In chemistry, neutralization or neutralisation (see spelling differences) is a chemical reaction in which acid and a base react with an equivalent quantity of each other.

  5. Acid-free paper - Wikipedia

    en.wikipedia.org/wiki/Acid-free_paper

    Acid-free paper is paper that, if infused in water, yields a neutral or basic pH (7 or slightly greater). It can be made from any cellulose fiber as long as the active acid pulp is eliminated during processing. It is also lignin - and sulfur -free. [1] Acid-free paper addresses the problem of preserving documents and preserving artwork for long ...

  6. Sodium gluconate - Wikipedia

    en.wikipedia.org/wiki/Sodium_gluconate

    It is the sodium salt of gluconic acid. Its E number is E576. This white, water-soluble powder has a wide range of applications across industries. Originally derived from gluconic acid in the 19th century, Sodium Gluconate is known for its chelating properties and is utilized as a chelating agent in various processes.

  7. Acid neutralizing capacity - Wikipedia

    en.wikipedia.org/wiki/Acid_neutralizing_capacity

    Acid-neutralizing capacity or ANC in short is a measure for the overall buffering capacity against acidification of a solution, e.g. surface water or soil water . ANC is defined as the difference between cations of strong bases and anions of strong acids (see below), or dynamically as the amount of acid needed to change the pH value from the ...

  8. Paper chemicals - Wikipedia

    en.wikipedia.org/wiki/Paper_chemicals

    Paper chemicals. Paper chemicals designate a group of chemicals that are used for paper manufacturing, or modify the properties of paper. These chemicals can be used to alter the paper in many ways, including changing its color and brightness, or by increasing its strength and resistance to water. [1] The chemicals can be defined on basis of ...

  9. Photographic fixer - Wikipedia

    en.wikipedia.org/wiki/Photographic_fixer

    Photographic fixer. Photographic fixer is a mix of chemicals used in the final step in the photographic processing of film or paper. The fixer stabilises the image, removing the unexposed silver halide remaining on the photographic film or photographic paper, leaving behind the reduced metallic silver that forms the image.

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