Discover your career path

Laboratory Tester

Examine, measure, photograph, and test synthetic fiber samples.

What does a Laboratory Tester do?

Examines, measures, photographs, and tests synthetic fiber samples to facilitate quality control of forming, treating, and texturing processes, performing any combination of following tasks: Dips several twisted threads in melted wax and directs stream of cold water over threads to congeal wax. Slices threads crosswise, using microtome. Dissolves wax, using solvent, and positions thread sample on microscope slide. Inserts slide in microscope and photographs sample, using standard microphotographic equipment and techniques. Develops, prints, and labels photographs. Analyzes photographs to determine whether structure and other characteristics of thread meet plant standards. Determines tensile strength of thread samples, using device that draws material between two jaws until breakage occurs. Measures cross-sectional area of thread samples, using planimeter. Immerses samples in water, corrosives, or cleaning agents to detect shrinkage or damage. Places thread samples in dye bath to evaluate permeability of dye and exposes samples to controlled light source to ascertain fade resistance. Prepares and submits reports of findings to production personnel to facilitate quality control of product.