Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun The complex ion Fe(CN)63− or any of various salts containing it, used in making blue pigments.
from The Century Dictionary.
- noun Acompound of a base or basic radical with ferricyanogen.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Chem.) One of a complex series of double cyanides of ferric iron and some other base.
- noun (Chem.) red prussiate of potash; a dark, red, crystalline salt, K6(CN)12Fe2, consisting of the double cyanide of potassium and ferric iron. From it is derived the ferrous ferricyanate,
Turnbull's blue .
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun chemistry any of various
salts containing thetrivalent anion Fe(CN)63-; used in makingblue pigments - noun chemistry a
complex ion in which a centralferric iron atom is surrounded by sixcyanide ions
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun salt of ferricyanic acid obtained by oxidation of a ferrocyanide
Etymologies
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Examples
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Irradiation of melanin for 20 min increased the velocity of the NADH/ferricyanide coupled reaction 3-fold in comparison to that measured for non-irradiated melanin, while 40 min irradiation had an even larger effect, causing a 4-fold increase in velocity (Table 1).
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While similar actions today are considered unethical, it was common practice in newspaper and magazine darkrooms to have potassium ferricyanide next to spotting pigment bottles.
Archive 2009-06-01 2009
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The excitement of exposing and watching a print develop and then working on the print with ferricyanide after the fix kept my eyes occupied.
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While similar actions today are considered unethical, it was common practice in newspaper and magazine darkrooms to have potassium ferricyanide next to spotting pigment bottles.
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He was also known to print images down to black and use potassium ferricyanide or bleach to reveal only the areas he wished to show.
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He was also known to print images down to black and use potassium ferricyanide or bleach to reveal only the areas he wished to show.
Archive 2009-06-01 2009
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As good a formula as any is: Potass ferricyanide, 300 grains; potass bromide, 100 grains, water 20 ounces; Ammonium bromide may be used in place of the potassium salt in the above formula; the difference is not marked, but the ammonium compound tends to give a somewhat warmer brown or sepia.
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If, however, only a portion of the print needs reduction, this can be effected by applying the ferricyanide solution locally with a brush or bit of absorbent cotton.
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A very dense negative, for instance, may be reduced either with the ferricyanide of potash or persulphate of ammonia reducer; and a thin negative with proper graduations can frequently be intensified to advantage in the print.
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Expose until the image is visible, then develop by floating on a solution of potassium ferricyanide at 5 per 100 of water — the image appears at once with a rich brown color.
Photographic Reproduction Processes Peter C. Duchochois
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