7 Pre - C The substrate being treated is a 7 x 10”...

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Santiago Rubio Robin Kirkman Experiment 7: Dyeing of a Cotton/Polyester Blend with Reactive and Disperse Dyes October 14, 2010 I. Part 1 A. The process we will perform in this experiment is the dyeing of a cotton and polyester blend fabric. The dyeing process will require reactive and disperse dyes for a uniform finished product. B. The chemicals being used in this lab include the C.I. Reactive red 120 dye that will dye the cotton fibers. The C.I. Disperse blue 27 dye will dye the polyester fibers. Superclear R 80N is an anti-migration agent that will be used to make sure the dyes will not be removed from the fabric during drying. Renex R 36 is the wetting agent used in the scouring bath. Basotol R is an anti-reducing agent that will help the dyes not reduce too quickly and cause undesired product. Urea is a humectant that will be used to hold moisture during the curing of the reactive dye and at the same time it will increase the solubility and levelness of the dye. Sodium Carbonate will be used as a pH control in the scouring bath.
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Unformatted text preview: C. The substrate being treated is a 7 x 10” cotton/polyester fiber blend fabric. D. 1. The first step in the process is to weigh the fabric to the nearest 0.01 g. 2. Pad the fabric to 80-100% WPU with the already prepared bath and record our weight to the nearest 0.01 g. 3. Evenly dry the padded fabric in the oven at 100-110 o C for 5 minutes, cut a swatch, and label it “padded, not cured.” 4. Hang the dried sample in the cure oven at 199 o C for 2 minutes, cut a swatch, and label it “fixed-unscoured.” 5. Wash remaining fabric in hot water in the kettle for 5 minutes. 6. Prepare a 1000 mL scouring bath with sodium carbonate, Renex R 36, and water. 7. Immerse dyed fabric in bath in Gibbs machine at 80-85 o C. When it reaches 80 o C agitate for 10 minutes. Remove sample, rinse, extract, and dry. Cut swatch and label as “fixed-scoured.” 8. Examine dyed fabric in a low-power microscope and record observations....
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