| 单词 | quinacridone red |
| 释义 | > as lemmasquinacridone red Each of four synthetic isomeric compounds (or their substituted derivatives) whose molecules consist of three benzene and two 4-pyridone rings arranged alternately, and which include a number of (typically red or violet) pigments. Frequently attributive forming the names of such pigments, as quinacridone red, quinacridone violet, etc.Formula: C20H12N2O2. ΘΚΠ the world > matter > chemistry > organic chemistry > organic dyes > [noun] > azo or diazo dyes > similar compounds quinacridone1906 1896 Jrnl. Chem. Soc. 70 i. 261 Hydroxyquinacridone.] 1906 Jrnl. Chem. Soc. 90 i. 459 Quinacridone,..crystallises in yellow needles..and dissolves in concentrated sulphuric acid to a yellow solution with a greenish-blue fluorescence. 1958 Chem. Abstr. 52 10215 Dihydroquinacridones..can be oxidized to quinacridones, pigments of good light fastness. 1969 R. Mayer Dict. Art Terms & Techniques 321/2 Besides this relatively yellowish or scarlet shade, bluish, magenta, and violet shades are also made from the same dyestuff (linear quinacridone) that yields quinacridone red. 1972 Materials & Technol. V. xi. 358 Quinacridone reds, maroons and violets are a comparatively recent introduction. These very expensive pigments have excellent light-fastness in full colours and in pastel shades. 1995 Computer Weekly 7 Dec. 42/6 Quinacridones are special high-performance pigments used in automotive paints. < as lemmas |
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