Achieve Consistent Color Of PET Bottles With Color Testers

Reviewed by Anurag Mishra (Sr. Technical Consultant)

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The color is the essential property which significantly affects the buying behavior of the customers and help to change the perception of the customers. Many Beverages and pharmaceutical companies understand the importance of colors and try their best to ensure the color of their PET (Polyethylene terephthalate) bottles must remain consistent and accurate every time. To maintain the color harmony of the PET bottles, manufacturers make use of measuring technologies such as color testers throughout their process of manufacturing to ensure the quality and color consistency of the products. To ensure the color quality of the products, it is necessary to test the colors of plastic pellets or granules first. This is done necessarily in the PET & Preform production houses to ensure the color value of the pellets within the acceptable range.

Purpose of Using TP 60CP Color Tester in PET Industry

The instrument is used to ensure the color values of the products using the transmittance or reflectance measurement curves according to the nature of the samples i.e. opaqueness, transparency or translucency. For example, the opaque closures or caps of PET bottles and the textures top surface of the closures are measured using the reflectance mode of the instruments where are the transparent or translucent part of the bottles is measured efficiently using the transmittance mode of the devices.

Technical Expertise of Testronix’s TP 60CP Color Tester 

  • It works on the viewing geometry of 8o/d.
  • The device provides the illumination to the sample on the basis of LED light.
  • It is equipped with an array of photodiode silicone sensor.
  • The instrument is designed with two measuring apertures, e., flat and tip with the diameters 8mm and 4mm respectively.
  • The portable device can be operated by selecting different color spaces as per the specifications of the sample and as per the test requirements i.e. include CI E L AB, XYZ, CI E RGB, LCh, CI E LUV
  • The color difference formula used by the testing device is ΔE* ab, ΔE( h) , ΔE* uv, ΔE*cmc (2: 1), ΔE* 94, ΔE* 00, ΔE*cmc (1: 1),
  • Other chromaticity used by the testing device includes YI ( D1925, 313), WI ( E313, CI E, AATCC, Hunter), Staining Fastness, J PC79, Color Fastness, BFD( 1. 5: 1), FMCII and much

Key Features of Testronix TP 60CP Color Tester

  • The device took very short time of 0.4 seconds to measure a single sample.
  • The color values of the samples are shown in the form of color difference value graph and display the results in Pass/Fail criteria.
  • The instrument repeatability rate is ΔE* ab 0. 03 with an average of 30 56.

Testronix offers a broad range of accessories also with the TP 60CP on customer’s request which includes Powder test box, Built-in white calibration, universal test components, extended measuring aperture of diameter 8mm, etc. For more information on TP 60CP color tester, visit:

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