metachromen.adj.

Brit.

/ˈmɛtəkrəʊm/, U.S.

/ˈmɛdəˌkroʊm/

Origin: Formed within English, by derivation. Etymons: meta- prefix, -chrome comb. form.

Etymology: < meta- prefix + -chrome comb. form. Compare metachromatism n. 1, metachromism n.

†A. n.

Chemistry. A substance that changes colour when heated. Cf. metachromatism n. 1a, metachromism n. 1. Obsolete. rare.

ΘΚΠ

the world > matter > chemistry > chemical substances > [noun] > types by properties

agent1624

analyser1661

pyrophorus1734

pyrophore1788

frigoric1812

diffusate1850

diffusant1867

cryogen1875

metachrome1876

carrier1902

getter1912

active1918

network former1947

network modifier1947

radiosensitizer1953

monophase1968

1876 Chem. News 11 Feb. 60/2 The author [sc. W. Ackroyd]..passed on to the classification of metachromes, which he arranges in two groups.

B. adj.

Dye Chemistry. Designating certain dyes and mordants that are applied simultaneously in the same bath; relating to or using such dyes.

ΘΚΠ

the world > matter > colour > colouring > colouring matter > [adjective] > yielding dye > types of dye

substantive1794

alizarin1857

Congo red1885

neutral1892

Janus1898

metachrome1901

direct1902

indigoid1908

reactive1941

thioindigoid1943

1901 Jrnl. Soc. Dyers & Colourists 17 66/1 Metachrome Brown B Paste: This colour is the first of a new series of (metachrome) dyes which have the property of dyeing in the single bath with metallic salts... With less than 3 per cent. dyestuff, 3 per cent. metachrome mordant must be used, but with larger amounts of dyestuff an equal amount.

1927 R. S. Horsfall & L. G. Lawrie Dyeing Textile Fibres ix. 263 The meta-chrome process as originally introduced..was confined to a comparatively small number of dyestuffs derived from picramic acid.

1963 A. J. Hall Student's Handbk. Textile Sci. iv. 184 The third (metachrome) method enables both dye and bichromate to be applied at the same time and it depends on the fact that no appreciable combination occurs between the bichromate and the wool or the dye under alkaline conditions, but this holds only for a limited number of dyes.

1987 F. Thompson & T. Thompson Synthetic Dyeing 11 Further research improved on this with the ‘metachrome’ system in which the mordant and dye are used together in the dyebath.

This entry has been updated (OED Third Edition, December 2001; most recently modified version published online March 2022).

单词	metachrome
释义	metachromen.adj. Brit. /ˈmɛtəkrəʊm/, U.S. /ˈmɛdəˌkroʊm/ Origin: Formed within English, by derivation. Etymons: meta- prefix, -chrome comb. form. Etymology: < meta- prefix + -chrome comb. form. Compare metachromatism n. 1, metachromism n. †A. n. Chemistry. A substance that changes colour when heated. Cf. metachromatism n. 1a, metachromism n. 1. Obsolete. rare. ΘΚΠ the world > matter > chemistry > chemical substances > [noun] > types by properties agent1624 analyser1661 pyrophorus1734 pyrophore1788 frigoric1812 diffusate1850 diffusant1867 cryogen1875 metachrome1876 carrier1902 getter1912 active1918 network former1947 network modifier1947 radiosensitizer1953 monophase1968 1876 Chem. News 11 Feb. 60/2 The author [sc. W. Ackroyd]..passed on to the classification of metachromes, which he arranges in two groups. B. adj. Dye Chemistry. Designating certain dyes and mordants that are applied simultaneously in the same bath; relating to or using such dyes. ΘΚΠ the world > matter > colour > colouring > colouring matter > [adjective] > yielding dye > types of dye substantive1794 alizarin1857 Congo red1885 neutral1892 Janus1898 metachrome1901 direct1902 indigoid1908 reactive1941 thioindigoid1943 1901 Jrnl. Soc. Dyers & Colourists 17 66/1 Metachrome Brown B Paste: This colour is the first of a new series of (metachrome) dyes which have the property of dyeing in the single bath with metallic salts... With less than 3 per cent. dyestuff, 3 per cent. metachrome mordant must be used, but with larger amounts of dyestuff an equal amount. 1927 R. S. Horsfall & L. G. Lawrie Dyeing Textile Fibres ix. 263 The meta-chrome process as originally introduced..was confined to a comparatively small number of dyestuffs derived from picramic acid. 1963 A. J. Hall Student's Handbk. Textile Sci. iv. 184 The third (metachrome) method enables both dye and bichromate to be applied at the same time and it depends on the fact that no appreciable combination occurs between the bichromate and the wool or the dye under alkaline conditions, but this holds only for a limited number of dyes. 1987 F. Thompson & T. Thompson Synthetic Dyeing 11 Further research improved on this with the ‘metachrome’ system in which the mordant and dye are used together in the dyebath. This entry has been updated (OED Third Edition, December 2001; most recently modified version published online March 2022). < n.adj.1876
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