Measuring colour in the plastics industry

From polymer pellets to a wide variety of ophthalmic lenses and vision care materials, Stotto - HunterLab UK & Ireland is unsurpassed in designing easy-to-use instruments for plastic’s hard-to-measure colour samples. Plastics industry professionals depend on the uncompromising colour consistency that we deliver from sample to sample and facility to facility. We offer the broadest range of solutions in the industry including portable, benchtop or online instruments tailored to every need and budget.

Plastic Pellets

Extruded plastic compounds cut into smaller pieces and later be used in further plastic-forming processes such as extrusion or injection moulding, pellets are a key component to virtually all plastic manufacturing processes. And the first step in ensuring consistency of the final colour of any plastic product is controlling the colour of the compound itself.

Extruded Plastic

Vinyl siding, window frames, plastic films and sheet, weather stripping, fence, deck railing, wire insulation and pipe and tubing are all examples of extruded plastic products, a high volume manufacturing process in which raw plastic material is melted and formed into a continuous profile.

Plastic Bottles

Across a variety of product lines, plastic bottles play a key and important role in marketing a company’s product. Their unique styles, shapes and colours are designed to appeal to consumers; from the attractiveness of the bottles themselves to their ability to adequately present the products they contain.


Preforms are injection moulded and then stretch blow moulded or inflated into the shape of plastic bottles, jars and other containers used to package beverages, detergents, condiments and many other consumable products. Managing the colour of these preforms is the first step in ensuring consistent colour quality of the final products they become. For over 60 years, major brand owners around the world have relied on the knowledge and expertise of Stotto - HunterLab UK & Ireland to help them maintain colour consistency throughout their supply chain.

ophthalmic lenses

Historically, eyeglasses have been seen as unfashionable and carried several potentially negative connotations. Today, as much as they are used to correct visual deficiencies such as myopia, hyperopia, astigmatism, and presbyopia, eyeglasses and contact lenses have become an acceptable fashion item and often act as a key component in defining an individual’s personal image. An important aspect in the production of ophthalmic lenses is colour measurement, and manufacturers of these lenses and the raw materials used to make them have relied on the knowledge and expertise that working with The Stothard Group brings.