Abstract
In this research, cotton fabrics scoured with nonionic detergent were dyed with four different direct dyes (Thiazole, Disazo, Trisazo and Polyazo). The dyed fabrics were then treated with anionic, cationic, nonionic, micro and macro emulsion silicone softeners. CIELAB color coordinates (L∗, a∗, b∗, C∗ and h) were measured with reflectance spectrophotometer. The lightness (L∗ value) for samples dyed with disazo and polyazo direct dyes (orange and red dyes) showed an increase after treatment with all the mentioned softeners, while it was decreased for thiazole and trisazo dyed fabrics treated with anionic, cationic, micro and macro emulsion silicone softeners. The wash and light fastness properties of samples were measured according to ISO 105-CO5 and Daylight ISO 105-BO1. The washing fastness properties of some direct dyed samples were decreased after treatment with softeners. In the case of light fastness properties, it was decreased for most of the samples.
Kurzfassung
In dieser Untersuchung wurden mit nichtionischem Tensid vorbehandelte Baumwollgewebe mit vier verschiedenen Direktfarbstoffen (Thiazol, Disazo, Trisazo und Polyazo) gefärbt und anschließend mit anionischen, kationischen, nichtionischen, Mikro- und Makroemulsion-Silikonweichmachern ausgerüstet. Die CIELAB-Farbkoordinaten (L∗, a∗, b∗, C∗ and h) wurden mit einem Remissionsspektralphotometer gemessen. Die Helligkeit (L∗-Werte) der mit Disazo- und Polyazodirektfarbstoffen gefärbten Proben (Orange- und Rotfärbung) nahm nach der Behandlung mit den genannten Weichmachern zu, während diese bei den mit Thiazol- und Trisazodirektfarbstoffen gefärbten Geweben nach der Behandlung sank. Die Wasch- und Lichtechtheiten der Proben wurden nach ISO 105-CO5 and Daylight ISO 105-BO1 ermittelt. Dabei nahm die Waschechtheit nach der Behandlung mit Weichmachern bei einigen, und die Lichtechtheit bei den meisten Proben ab.
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