Color measurement of PET bottles and preforms

Across various product groups, plastic bottles and preforms play an important role in marketing a company’s product. Their unique designs, shapes and colors have been developed to appeal to consumers in the best possible way, to present the products they contain appropriately and to increase recognition value.

Plastic bottles and preforms differ in size, shape and color. Like all plastic products, they can be opaque, translucent or transparent. Color measurement requirements can go beyond transmission and reflectance measurement of spectral data to include CIE L*a*b* color, yellowness index, haze and other appearance related properties.

Our solutions for your products:

Vista

Standard-compliant testing of color and turbidity
  • Color & Haze

    Simultaneous measurement of color in transmission and haze.
  • Enough space for samples

    Large transmission shaft for many sizes and types of cuvettes, vials and foils.
  • Integrated QC software

    The EasyMatch QC Essentials quality control software is integrated into the device and provides all the required color indices, color numbers and metrics.
Aeros
Aeros
  • Full spectrum

    Illumination range of 400-700 nm and long-life LED combination module
  • Smart user interface

    Your measurement results can be easily transferred to existing LIMS or SPC systems.
  • Uncomplicated & precise

    Simple "one touch" measurement reduces training time, optimizes the workflow and increases your productivity.

UltraScan VIS

Color measurement of opaque and translucent samples
  • Reflection

    Measuring apertures with 25.4 mm and 9.35 mm provide the prerequisite for precise measurement results in reflection.
  • Transmission

    Large transmission compartment with 100 mm depth for measurements in total and regular transmission to determine color/opacity.
  • Construction & function

    The device complies with the internationally recognized color measurement standards of ASTM, DIN and ISO.

UltraScan VIS
  • 10 nm resolution

    With a true optical resolution of 10 nm, the UltraScan VIS offers high accuracy for measurements on liquids and solutions.
  • CIE-recommended measuring range

    The UltraScan VIS covers the wavelength range from 360 nm to 780 nm recommended by the CIE.
  • Robust

    Solid construction with optical bench and protected transmission range thanks to sliding cover.

Application example:

Color measurement on preforms

Opaque and transparent preforms Preforms are injection-molded and then stretch-blown into the shape of plastic bottles, jugs and other containers. They are used to package beverages, detergents, spices and numerous other consumer products. Managing the color of these preforms is the first step in ensuring consistent color quality of the final product they become. Preforms come in a range of sizes, shapes and colors. They can be opaque, translucent or transparent and therefore require different measurement techniques depending on the type of sample. Opaque preforms are not penetrated by light and are best measured using a reflectance meter with a diffuse d/8° spherical geometry. Translucent...

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Further information for you on this topic:

HunterLab worldwide:

  • Headquarters, North / South America

    Hunter Associates Laboratory, Inc.

  • 11491 Sunset Hills Road

    Reston, VA 20190-5280

  • 703-471-6870

  • 703-471-4237

  • Asia-Pacific

    HunterLab Asia Limited
  • Leo Cheung, Regional Manager Flat E, 13/F Leahander Center

    28 Wang Wo Tsai Street, Tsuen Wan New Territories, Hong Kong

  • +852 2406 1723

  • Europe / Middle East / Africa

    HunterLab Europe GmbH

  • Dr.-August-Einsele-Ring 15

    82418 Murnau

  • +49 8841 9464

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Our color measurement solutions are individual and versatile. In our overview you will find the right device and the right software for all applications.