9 Pre - be used for pH control. C. The substrates being...

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Santiago Rubio Robin Kirkman Experiment 9: Dyeing of an Acrylic Fabric with a Fluorescent Cationic Dye October 28, 2010 I. Part 1 A. The process being performed in this experiment is the fluorescent dyeing of an acrylic woven fabric. In one bath there will a retarder but not in the other. We will see how the cationic dye dyes the fabric as well as which fibers on the multifiber strip. We will illustrate the effects of the cationic retarder and the fluorescence of the dye by visual and color measurement tests. B. The chemicals used in the experiment include Sevron Brilliant Red 2B C.I. Basic Violet 16 which is the cationic dye. Basacryl Salt NB-KU which is the cationic retarder that will reduce the initial rate of strike. Sodium Sulfate to promote levelness of dyeing on the fabric. EDTA which is a sequestering agent that will soften the water by removing metal ions that can modify the dyed fabric. Renex 36 is a nonionic surfactant that will remove unreacted dye. Acetic acid will also
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Unformatted text preview: be used for pH control. C. The substrates being treated are two 10 g samples of Orlon 75 acrylic woven fabric and two multifiber strips. D. 1. The first step in the process is to weigh the two acrylic fabrics and attach a multifiber strip to each one. 2. Prepare DYEBATH A with just water and the dye. Prepare DYEBATH B with the dye, retarder, sodium sulfate, acetic acid, Renex 36, EDTA, and water. 3. If needed adjust the pH with acetic acid in baths to 4.0-4.5. 4. Place the fabric samples on spiral holders and into the beakers in their appropriate baths. The beakers are then place in the Gibbs machine and heated to 95 o C and maintained for 20 minutes. 5. Remove beakers, rinse in warm water, and remove all chemicals through padder. 6. Evaluate multifiber strips using the Chromatic Transference Scale. 7. Make color measurements using the portable spectrophotometer....
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