EFFECT OF SOME FABRICS CONSTRUCTION TREATED WITH NATURA L DYES ON THEIR FUNCTIONAL PROPERTIES

Abstract

The study aimed on determine the best fabric constraction , natural dyes and mordant according to fastness properties. Statistical analysis was used to determine the effect of fabric construction, dyeing and mordanting as well as their interaction on the functional properties of samples. The investigated variables included: Weave construction of fabrics filling with fibranne and viscose (plain- twill-satin) with (Low-medium- high) picks for weft. Dyes were curcumin, madder and cutechin, Pre-mordanting (copper-ferrous suphate). Measurements of physical properties included (number of ends- warp count-wist direction and number of twist). Colour strength and fastness to (light • dry clean- rubbing (wet and dry)- acid and alkaline perspiration ). Determined. The highest k/s values found for samples dyed with curcumin cutechin, mordanted (ferrous sulphate) and those dyed with madder, mordanted copper sulphate. Mordanting decreased the lightness for samples dyed with cutechin particularly with copper sulphate. Values of fastness to light, dry clean and rubbing were excellent with Ferrous sulphate). Fastness to acid prespiration demonstrated little colour change. Mordanting with ferrous sulphate increased fastness to acid prespiration. These values were good, while to alkaline prespiration were very good. The highest colour strength values were seen for samples dyed with cutechin, mordanted with ferrous sulphate. Dye with or without mordant had significant effect on k/s of fibranne samples. Picks with dye or mordant or the three variable interaction had insignificant effect on viscose samples except for number of picks alone had significant effects. For fibranne samples, the highest lightness values were for curcmmin. Mordanting with ferrous sulphate decreased the lightness. For viscose samples the lowest lightness scores were with cutechin. Three were significant effects of dye, mordant alone or number of picks alone on lightness. The highest scores of fastness to light found for samples dyed with cutechin, y mordanted (copper sulphate). All treatments alone or their interactions had significant effects on fastness to light. The highest values of fastness to dry clean were for fibranne samples dyed with curcumin, mordanted (copper sulphat). All treatments has significant effects on dry clean. For fibranne, samples to rubbing illustrated the highest value with cutechin. Mordanting increased fastness to rubbing of viscose samples (ferrous sulphate). Effects of treatments alone or their interaction were significant. The highest fastness to acid prespiration found for viscose dyed with curcumin, mordanted (ferrous sulphate). The hgihest values found for dyed fibranne samples with cutechin, mordanting (copper sulphate). The number of picks with dye had insignificant effect for twill fibranne and satin viscose. The effect of number of picks with dye and mordanted was insignificant. The effects of all treatments were significant. The highest values of fastness to alkaline prespiration found for samples dyed with curcumin. Mordanting increased fastness to alkaline prespiration, especially ferrous sulphate. The number of picks with dye or mordant and interaction of fibranne had insignificant effect. The samples having the first ranks included the following: plain fibranne (20 picks/cm) dyed with madder and mordanted with copper sulphate twill and satin fibranne (22 picks/ cm) dyed with cutechin, mordanted with ferous sulphate-plain, twill and satin viscose (16-20-18 picks/ cm respectively) dyed with cutechin & mordanted (ferrous sulphate).