Using a spectrophotometer is the best way to measure the color of plastic pellets. These technological devices deliver reliable and accurate measurements that help you ensure the color remains consistent with each batch while adhering to industry standards.
Measure the Color of Plastic Pellets Using the Right Equipment
Plastic pellets vary in transparency and opacity, so you should use the appropriate measurement equipment and accessories for accurate results. Plastic pellets should be measured with a reflectance spectrophotometer. Opaque plastic pellets require only a sample cup, while transparent plastic pellets may require the use of an opaque cover.
Keep Industry Standards in Mind
An effective color measurement system follows industry standards. As a part of quality and process control, it's important to measure the color of plastic pellets according to the testing standards set by ASTM. Plus, following the standards ensures you measure the pellets more accurately for consistent results.
Spectrophotometers can help you adhere to industry standards by offering a straightforward way to meet the outlined specifications.
Assess the Degree of Yellowness
Achieving clear and consistent colors is critical in plastic production. However, plastic resin can turn yellow when subjected to oxidation. Yellowness directly impacts the value and perceived quality of plastic products. To prevent the yellowish appearance, optical brighteners are used to make the plastics look more clear or white.
Optical brighteners are also often used to enhance the appearance of recycled plastics. As a result, it's essential to assess the degree of yellowness in plastic resin to determine the appropriate concentration of optical brighteners needed to counteract the yellowing effect of plastics throughout the supply chain.
As the plastic production industry moves toward using recycled plastics, you'll need a robust spectrophotometer that can measure the color and fluorescence quality of virgin and recycled plastic resin and a combination of the two. By doing so, the spectrophotometer can help mitigate yellowness and ensure the optical brighteners are adjusted for at every stage of the production process.
