Carpet - Model 600 Color Measurement Application

The Model 600 Imaging Spectrophotometer is ideal for the measurement of carpet (or similar products). The ability to measure color over large areas makes it the ideal instrument for this application. Similar products can include rugs, mats, runners etc.

carpet samples

Application Considerations

  • Carpet is non-uniform in nature.
  • Requires the ability to average over large areas.
  • Users should pay particular attention to the following.
    • Carpet direction and presentation
    • Backing color because it MAY influence the perceived color of the carpet and therefore, should be consistent when measuring.
    • Temperature and Humidity conditions MAY influence dyes and therefore, should be consistent when measuring.
  • Some carpets contain fluorescent materials resulting in increased sensitivity in the UV portion of the light source.
  • Carpet industry generally chooses analysis with D65 (10 Observer) using the CIELAB L*a*b* color coordinates.

Measurement Demonstration

  1. Select and setup system with appropriate lighting modules.
  2. Turn on system in accordance with manufacturer specifications.
  3. Calibrate system.
  4. Set software specifications to the desired Illuminant Type, Observer Type and Color Coordinates.
  5. Prepare a carpet sample for measurement. It is always better to cut samples larger than the field of view of the system in order to allow the sample area to lay flat.
  6. Center the sample on the system table as shown below.
  7. Measuring Booth
  8. Measure sample, generally takes approximately 45 seconds depending on measurement conditions.
  9. Analysis can take on many forms. Discreet color measurements can be done over large (or small) areas by simply selecting the Region of Interest (ROI) as shown.
  10. Reflective Analysis
  11. Colors can also be compared to previously measured STANDARDS as shown. In the example below, a measured sample is compared to a stored STANDARD for direct comparison. The user has the ability to specifically choose any sized area for direct comparison to the stored STANDARD.
  12. Full Frame Color Diference
  13. In the example below, a measured sample is compared to a stored STANDARD using a user specified aperture size. In this example, an aperture size of ~6mm is used and a DE comparison map is shown. Note: this is equivalent to making 1,461 discreet spot spectrophotometric DE measurements for each sample and mapping the resulting differences (shown in the lower right corner). The map shows us that 98.8% of the area matches (i.e. DE < 2.5) the STANDARD carpet.
  14. Full Frame Color Diference user selection
  15. Statistics are calculated for either DE method used and displayed to the user. In the "Spot DE Colors" table, you can see that 98.8% of the carpet shows a match to the master. It also shows that 98.8% of the carpet shows an average DE of 0.63. The "Full DE Colors" table is not applicable for this application because is simple contains too much resolution for this type of product.
  16. Full Frame Color Diference user selection

The Model 600 allows users to...

  • "See" the product and choose areas of interest.
  • Compare samples to stored STANDARDS for more consistent product quality.
  • Average color over large (or small) areas of their choosing.
  • Statistically analyze large areas using a "Virtual Spot Spectrophotometer" with a measurement aperture size of your choice that best suits your product.
  • Evaluate their product in its natural setting as opposed to being compressed or compromised in order to measure it.
  • Analyze complex colors and textures in a consistent manner.

¹Note: As capabilities of the Model 600 Imaging Spectrophotometer increase, there may be even more tools available for additional extraction of color information. Contact TRICOR Systems Inc for the latest information regarding capabilities for your specific application requirements.

TD-613 Rev A (July 2010)