Measuring the colour of opaque and transparent pellets is essential for ensuring consistency across production. This is especially true for plastic pellets, which are often produced in large manufacturing lines where checking each individual product can be challenging. To ensure the desired colour and appearance are achieved with every batch, it's important to consider these best practices:
Evaluate the Importance of Plastic Pellet Colours
Plastic pellets are primarily used as a raw material in the creation of nearly every plastic product. As the building blocks of plastic products, pellets must maintain a specific colour to align with the desired colour of the final product. While the colour of the pellets does not directly impact the final product's colour, it is still vital for quality control.
In the plastic industry, colour is essential for determining quality. Measuring the colour of opaque and transparent pellets is crucial for delivering a final product with the same reliable appearance that appeals to the customer.
Consider Industry Standards for Pellet Colours
The ASTM has developed a testing standard for determining the colour of pellets. Pellets are tested for their degree of yellowness or how the yellowness changes under daylight on transparent or opaque plastics. However, the yellowness attribute has to be considered with other tristimulus values from a spectrophotometer or colorimeter to quantify the colour precisely.
