Dissolution Chemical
Specialized solution prepared by dissolving zinc oxide in concentrated sodium hydroxide is used for the quantitative analysis of textile blends. The sodium zincate reagent is specifically designed to dissolve regenerated cellulose fibers like viscose and modal while leaving cotton unaffected. It is a more stable and less hazardous alternative to some other solvents.
This chemical stops working if it is diluted below its effective concentration.
Cotton Separation
Accuracy of the blend percentage depends on the selective action of the chemical on the different fibers. When the sodium zincate reagent is applied to a sample, it breaks the molecular bonds of the man-made cellulose. The cotton remains as a solid residue that can be filtered, dried, conditioned and weighed.
Mixture Analysis
Lab technicians use this method to verify the fiber composition of a wide variety of woven and knitted fabrics. The use of sodium zincate reagent requires strict adherence to temperature and time limits to ensure the cotton is not damaged. It is particularly effective for analyzing high end intimate blends.
Stability Requirement
Concentration of the chemicals must be maintained within a narrow range for the test to be valid. Sodium zincate reagent can become unstable over time as it absorbs carbon dioxide from the air. Fresh solutions are prepared regularly to ensure consistent results in the laboratory.
