Science / Chemistry / Alkalinity: A measure of a material's ability to neutralize acids. Alkalinities are usually determined using titration.
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Science / Chemistry / Buffer: A solution that can maintain its ph value with little change when acids or bases are added to it. Buffer solutions are usually prepared as mixtures of a weak acid with its own salt or mixtures of salt MORE
Entertainment / Photography / Ph Scale: Numerical system running from 0-14 and used to express the alkalinity or acidity of a chemical solution. 7 is neutral. Solutions with a lower ph value are increasingly acidic, and those with a higher MORE
Entertainment / Photography / Reticulation: Regular crazed pattern created on the emulsion surface of negatives which is caused by extreme changes of temperature or acidity/alkalinity during processing. MORE
Science / Periodic Table of Elements / Calcium (Ca): Atomic number: 20, Atomic mass: 40.08 g.mol -1, Electronegativity: 1.0, Mass volume: 1.6 g.cm-3 at 20?°C, Melting point: 840 ?°C, Boiling point: 1484 ?°C, Vanderwaals radius: 0.197 nm, Ionic radius MORE