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Why Does Color Vary in Natural Polyurethanes?
Natural polyurethanes vary from a light tan (almost yellow) to a medium-dark amber (almost greenish). This variation is noticed from supplier to supplier, and even within a given supplier’s production. Black or other colored (pigmented) polyurethanes do not typically exhibit this variability in color. It is important to note that these color variations have no impact on the chemical or physical properties of the polyurethane.

This variation in appearance is most often due to inherent variations in the prepolymer or amine curative components, durometer of the finished polyurethane, or the conditions during the storage, handling and processing of the components into polyurethanes. The appearance will further change with exposure to ambient UV radiation and with age.

Variations in appearance may be attributed to one or more of the following variables:

Harkness Industries was recently re-certified as compliant with the requirements of ISO9001:2000. Harkness has been ISO certified since 1997 . We take pride in the ongoing effort by every member of our team to support the continuous improvement process in which the company is engaged as part of our Quality Management System.

Harkness Industries’ Quality Policy
Our goal is to meet our customers’ expectations by simply doing it right the first time.

Please click here to see a copy of our current ISO certificate.

Harkness Industries is pleased to welcome Frank Schlegel as Director of Sales and Marketing, effective February 5, 2007. Frank brings an extensive background in chemical operations and sales management to our organization. His career at Uniroyal Chemical and its successor companies included research & development, manufacturing and most recently, in senior positions in sales management and global marketing. Frank holds a BS degree in Chemical Engineering, an MBA and is a licensed Professional Engineer.