rather different treatment, which will be dealt with in a later paper. EXAMINATION OF YELLOW OR ORANGE SHADES. TABLE I. The fibre may be dyed with one of the following coloring matters: 1. A basic acridine dyestuff, such as Phosphine, Benzoflavine, Rheonine, Acridine Yellow, Acridine Orange, Patent Phosphine, &c. 2. Auramine O and G. 3. Thioflavine T. 4. A basic azo dyestuff, e.g., Chrysoidine, Tannin Orange, New Phosphine or Janus Yellow. 5. Quinoline Yellow, Uranine, Eosine Orange. 6. Tartrazine, Orange G, 2G, R, &c. 7. Naphthol Yellow S, Martius Yellow (nitro group). 8. Fast Yellow, Indian Yellow, Azoflavine, Curcumeine extra, Orange II, Metanil Orange. 9. Metanil Yellow, Orange IV. 10. Thioflavine S, Chromine, Primuline, Chloramine Yellow, Chlorophenine, Diamine Fast Yellow B or FF, Thiazol Yellow, Clayton Yellow, &c. (thiazol group). Also Turmeric. 11. Curcumine S, Direct Yellows, Stilbene, Yellows, Naphthamine Yellows, Mikado Yellows, Diphenyl Citronine, Mikado Oranges, &c. (stilbene group). 12. Chrysophenine Yellow, Chrysamine, Carbazol Yellow, Cresotine Yellow, Diamine Yellows, Benzo Orange, Congo Orange, Diamine Orange, Pluto Orange, Dianil Orange, Toluylene Yellow and Orange, Pyramine Orange, &c. (azo group). 13. Fustic, Quercitron, or Weld (on AL or CR), Alizarine Yellow A, Galloflavine, &c. 14. Alizarine Orange. 15. A mordant azo dyestuff, such as Alizarine Yellow G and R, Anthracene Yellow C, Flavazol, Diamond Flavine, Metachrome Yellow, Metachrome Orange, Chrome Orange, &c. ANALYSIS. Boil twice for one minute with 5 per cent. acetic acid. A. Much color is stripped-Basic dyestuff. B. Boil with hydrosulphite B. X. Decolorized. Color is not restored by air or by persul phate. Azo Group No. 4-Chrysoidine, Tannin Orange, Janus Y. Not decolorized or only very slightly. Treat fibre with conc. H2S04. Green fluorescent solution. Acridine Group No. 1-Phosphine, Orange, &c. Fibre and solution of pale yellow-No. 3 Thio Little or no color is stripped—Acid, Salt or Mordant dyestuff. X. Much color is stripped but cotton remains white. Acid dyestuff. Boil with hydrosulphite B. Color is not affected. Quinoline or Pyrone Group No. 5-Quinoline Yellow, Uranine, Eosine Orange. Decolorized and color does not return on exposure to air or upon oxidation with persulphate. Azo or Nitro Group. Add conc. HCL to the ammoniacal extract. No change of color. Tartrazine Group No. 6— Becomes colorless. Naphthol Yellow S Group No. 7-Naphthol Yellow S and Martius Yellow. Becomes red. Fast Yellow Group No. 8-Fast Yellow, Indian Yellow, Azoflavine, &c. Becomes violet or violet red. Metanil Yellow, Y. Little or no color is stripped. Cotton remains white or is tinted. Boil with 5 per cent. sodium acetate and white cotton for two to three minutes. Cotton is stained-Salt dyestuff. Boil with hydrosulphite B. Not affected or slightly changed in shade. Thiazol Decolorized. Color restored by exposure to air or Decolorized. Color not restored by air or by Not affected. Flavone and Ketone Group No. 13- Decolorized and color not discharged. Azo Group EXAMINATION OF RED SHADES. TABLE II. The fibre may be dyed with one of the following coloring matters: 1. A basic red or pink of the pyrone group, such as Rhodamines, Irisamine, Anisoline, Pyronines, Rhodines, &c. 2. A basic red of the azine group, such as Safranine, Induline Scarlet, Rhoduline Red, Rhoduline Pink, &c. 3. A basic red of the triphenylmethane group, e.g., Magenta, Isorubine, Fuchsine, Cerise, &c. 4. A basic azo dyestuff, e.g., Janus Red. 5. A soluble red wood, such as Brazil Wood, Lima Wood, Peach Wood, &c. 6. A phenolic dyestuff of the pyrone group, e.g., Eosine, Phloxine, Erythrosine, Safrosine, Rose Bengal, &c. 7. An acid dyestuff of the pyrone group such as Fast Acid Eosine, Fast Acid Phloxine, Acid Rhodamine, Acid Rosamine, &c. 8. An acid azine, e.g., Azocarmine, or Rosindulines. 9. Acid Magenta (triphenylmethane group). 10. An acid azo scarlet or azo red, such as Xylidine Scarlet, Palatine Scarlet, Fast Reds, Bordeaux, Cloth Reds, Azofuchsine, Lanafuchsine, Sorbin Red, Chromotropes (unchromed), &c. 11. Cochineal Scarlet (tin mordant). 12. Archil (Cudbear). 13. A salt dyestuff, such as Diamine Scarlet, Diamine Red, Benzopurpurine, Hessian Purple, Rosophenine, Erica, Geranines, Anthracene Red, Bordeaux Extra, &c. 14. Cochineal Crimson (Al mordant). 15. Alizarine Reds or Acid Alizarine Reds. 16. An insoluble red wood, such as Camwood or Barwood. 17. A mordant azo color. ANALYSIS. Boil twice for one minute with 5 per cent. acetic acid. A. Color is stripped-Basic dyestuff or Soluble Red Woods. Boil with dilute alcohol (1:1) twice for one minute. Much of the color is stripped-Basic dyestuff. Boil with hydrosulphite A. Color not affected. Basic dyestuff of Pyrone Group Decolorized. Color returns quickly on exposure to air-Basic dyestuff of the Azine Group. Decolorized. Color does not return on exposure to air but is restored by persulphate. Basic dyestuff of the Triphenylmethane Group No. 3. Decolorized. Color not restored either by air or by persulphate. Basic Azo dyestuff, e.g., Janus Red No. 4. B. Little or no color is stripped-Acid, Salt or Mordant dyestuffs. Boil twice for one minute with dilute ammonia (1:100) and a small piece of white cotton. Keep the ammoniacal extract. X. Much color is stripped but cotton remains white-Acid dyestuff. Boil with hydrosulphite A. Color of wool is not altered. Pyrone Group No. 6. Precipitation and disappearance of fluorescence. No. 6 Eosine, Phloxine, Erythrosine, &c. No. 7 Decolorized. Color will not return on exposure to air. Azine Group No. 8-Azocarmine or Rosinduline. Decolorized. Color does not return on exposure to air but is restored by persulphate-Triphenylmethane Group No. 9. Decolorized. Color not restored either on exposure to air or on oxidation with persulphate. Azo Group. |