All about color variances in natural polyurethanes

If you’re considering a natural urethane for your next manufacturing project, here’s what you need to know about possible color variances.

The color of natural polyurethane can vary from supplier to supplier, and is impacted by a variety of environmental factors. Typically, they vary between a light tan (almost yellow) to medium-dark amber (almost green). No matter the color, the chemical and physical properties don’t change.

The color differences are a result of inherent differences in the prepolymer or amine curative components, the durometer of the finished polyurethane, storage conditions, and handling/processing of the plastic. The shape and any additives on the plastic can also affect its appearance. Exposure to UV light over time can also change its color.

It’s virtually impossible for a fabricator or manufacturer to promise a specific colour formulation as the unique combination of external forces affecting the plastic is unpredictable. If color consistency is important for your project, consider using black polyurethane, which has little to no color variation (and at Harkness Industries, black polyurethane is the same cost as natural so there is no budget issues with switching to black polyurethane if needed).

If you have questions about using natural, black or colored (pigmented) polyurethane plastic for your next project, contact the team at Harkness Industries who can help you pick out the right plastic for your unique needs.

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