Laboratory and Quality Assurance

At Seydel, we invest heavily in our laboratories and quality assurance capabilities.  Totaling over 5,100 square feet of workspace, our laboratories are some of the most expansive in the industry.  Each is outfitted with state-of-the-art equipment and staffed with highly trained, experienced technicians who are able to conduct a wide range of procedures.

A representative sample of the tests that our laboratory technicians conduct on a regular basis include:

Textile Size Cooks

  • pH
  • % Solids (i.e., physical property), various methods: Oven 110 C, IR heat, CEM (microwave), Ohaus (lamp balance)
  • Viscosity (various Brookfield Viscometers)
  • Appearance (mesh screen filtration)
  • QA Software (tabulations of data to establish QC specifications and product enhancement)

Filament and Spun Yarn Desize

  • Water w/detergent, acid or alkaline desize (quantitative extractions (assay) % size and moisture content, add-on)
  • Microscopy, crosssection, longitudinal view
  • Universal Yarn Tester (yarn hairness, lent generation, twist, denier, etc.)
  • Tensile strength and elongation via Instron
  • Abrasion test (cycles to break)
  • Spot test ( e.g., Iodine for starch, PVOH, etc.)

Textile Fabrics

  • Crockfastness
  • Laundry fastness
  • Fabric weight, ends & picks, yarn count
  • Padder (application of finish formulations)
  • Dispatch Ovens (curing)
  • Oil/soil release test

Paper and Packaging

  • Draw down rod (coatings)
  • Cobb Test (water resistance)
  • KIT Test (grease repellency)

OSB / Particle Board

  • Press
  • Water absorption bath

Liquids Manufacturing (polymer synthesis, blends, homogenizations)

  • pH
  • % Solids (see above various methods)
  • Viscosity ( Brookfield )
  • Titration – acid number, hydroxyl number, etc
  • Gardner color
  • Visual appearance
  • Specific gravity
  • QA Software (tabulations of data to establish QC specifications and product enhancement)

Alternative Testing Methods

  • Acid-Base titrations
  • Formaldehyde titrations
  • Ash method for organics (defoamers (volatiles), inorganics (ash) or polymers (volatile)

Analytical / Technical Assay

  • FTIR Fourier Transformer Infrared Spectroscopy (chemical functional groups C-H bonds, O-H bonds, etc.)
  • DSC Differential Scanning Calorimeter (polymer glass transition temperature, melting range, thermal characteristics, e.g., reaction-rate)
  • Melting point (Fisher-Johns)
  • Flash Point Tester
  • UV/Vis Spectrophotometer (colorimetric indigo quatification, enzyme assay, etc)
  • Instron Tensile Tester (fabric, paper, etc.)
  • Elmendorf Tear Tester
  • Stiffness Tester (e.g., denim)
  • Microscopy including photomicrography
  • Washfastness (Home and Industrial washer/dryer)
  • Milnor Industrial Wash (“Stone wash” denim)
  • % Ash (toll business % volatiles with Muffle Furnace)

If you’d like to learn more about our laboratory and quality assurance services, including our rates, or would like to schedule a tour of our facilities, please visit the contact us page or send an email to