Examination of variables that affect dyeing of acetate in a three dye system

This research evaluated three variables within an AATCC experimental laboratory procedure for dyeing acetate. Evaluation of color measurement from test samples and transmission, an indicator of dye exhaustion, from final dyebath was focused on reproducibility of color from dyeing to dyeing and maximum dye exhaustion. Experimental effects were 1) pH of dyebath, 2) high dyeing temperature for the test fabric, an acetate tricot, and 3) time at the high dyeing temperature. Major findings included: 1. pH of 4 produces significantly higher X and Y color reflectance values, measured by the Color Eye^R at the .05 level. pH of 4 and 6 produce significantly higher Z color values at the .05 level. Transmission readings, measured by the Spec 20^R, indicate exhaustion for the Disperse Red 4, Disperse Blue 3, and Disperse Yellow 3 dyes and are significantly higher for pH of 4 at the .05 level. 2. Temperature of (150°F) 65.6°C and (175°F) 79.4°C give significantly higher transmission readings for Disperse Red 4 at the .05 level. (175°F) 79.4°C and (200°F) 82°C give significantly higher transmission readings for Disperse Blue 3 at the .05 level. Disperse Yellow 3 is unaffected by temperature. 3. Time at the high dyeing temperature had no effect on color measurements or transmission. 4. Transmission is a qualitative indicator of dye concentration and exhaustion. 5. Leakage was prevented with one time use of Ball Jar Lids^R on the AATCC Wash Cups IIA used on the Atlas LaundryOmeter.^R

Name thesis:degree_name

Master of Science

Level thesis:degree_level

masters

Discipline thesis:degree_discipline

Clothing, Textiles, and Related Arts

Department dc:contributor.department

Clothing, Textiles, and Related Arts

Grantor dc:publisher

Virginia Tech

Year dc:date.issued

1974

Author dc:creator

• Winfrey, Elizabeth Lea

Statement dc:rights

• In Copyright

Licence dc:rights.uri

• http://rightsstatements.org/vocab/InC/1.0/

Dc Identifier Other

etd-07072010-020245

OAI identifier oai:identifier

oai:vtechworks.lib.vt.edu:10919/43560