Hair Color Products - Model 600 Color Measurement Application

Some of the most difficult printing applications are ones that contain hair color and skin tones. These types of products can include hair products, and in particular, hair color products. A large percent of marketing is done at the point of sale. If a customer dislikes the color shown on the package, then the chances of that customer purchasing that product is greatly reduced. If the color on the package is misleading then the chances of that customer repurchasing that product is also reduced. Shown below is a sampling of the types of hair color packaging.

hair color packaging

The print layers on these types of packages can be quite complex and difficult to maintain color across the entire package. Most often, these packages include color tables that exhibit the sensation of hair color across the entire package. So, this begs the following question:

Why do you only measure spots when you can measure the entire package?

In this application write-up, we will demonstrate the Model 600 Imaging Spectrophotometer and how it allows you to measure the "entire package" for complete color management.

Application Considerations

  • Non-Contact type measurements are preferred.
  • Package color content is highly variable.
  • Requires the ability to evaluate color difference to a digitally stored master.
  • Requires the ability to evaluate color difference (i.e. Delta-E) over large areas.
  • Users should pay particular attention to the following...
    • Package flatness which is accomplished by use of the optional vacuum table.

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 sample for measurement.
  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. Data is now ready for analysis

Analysis

The front of the package can be compared to a previously measured STANDARD package. In the two examples below, a measured sample is compared to a stored STANDARD using 2 different user specified aperture sizes (2mm & 1mm).

Hair Color Analysis
Data extracted using a 2.0mm VSS, showing a 98.2% match (Equivalent to 2,693 Delta-E measurements)
Hair Color Analysis
Data extracted using a 1.0mm VSS, showing a 94.0% match (Equivalent to 10,080 Delta-E measurements)

Note: The mapping consists of 4 total colors. Each color represents a specific range of DE values. In this example the user has specified the following values, DE 0.00 thru 2.50 (green), DE >2.50 thru 5.00 (yellow), DE >5.00 thru 10.00 (red).

It can be seen from the maps and statistics above that the front labels of the sample and standard have a 94+% color match based on the user specified criteria shown above.

Analysis (Package Sides/Back)

The sides/back of the package can also be compared to a previously measured STANDARD package. In the two examples below, a measured sample is compared to a stored STANDARD using 2 different user specified aperture sizes (2mm & 1mm).

Hair Color Analysis
Data extracted using a 2.0mm VSS, showing only a 28.1% match in the selected region
Hair Color Analysis
Data extracted using a 1.0mm VSS, showing only a 31.2% match in the selected region

Note: The mapping consists of 4 total colors. Each color represents a specific range of DE values. In this example the user has specified the following values, DE 0.00 thru 2.50 (green), DE >2.50 thru 5.00 (yellow), DE >5.00 thru 10.00 (red).

It can be seen from the maps and statistics above that the side labels of the sample and standard show significant color differences. The color mapping shows that these colors differences vary across the entire table. The hair colors displayed at the bottom of the table (yellow) are more skewed than the colors at the top of the table (green). The mapping allows us to identify the areas of interest and focus on those areas. This focused analysis shows only a 30% color match or more importantly, a 70% significant color difference.

Conclusion

Packaging, like the ones demonstrated in this application, can be very difficult to print and even more difficult to color analyze using conventional "spot spectro". These types of packages contain colors that continuously vary across the package. These varying colors can be primarily found in the hair and skin and must be correct. If these areas on the package are not correct, then the manufacturer risks a reduction in sales due to an unpleasant visual feel by the potential customer.

These packages are difficult to accurately measure using spot devices. However, the Model 600 Imaging Spectrophotometer allows color comparisons across the entire package and NOT just at a single point. That results in the ability to check the model's entire face and hair in just seconds.

The Model 600 allows users to...

  • Extract full spectral data curves from anywhere on the package.
  • Compare printed packages to accepted digitally stored STANDARDS in their entirety.
  • Average color over large (or small) areas of their choosing.
  • Analyze complex colors and textures in a consistent manner.
  • Analyze as much as 100% of the surface area with a "Virtual Spot Spectrophotometer" (VSS) with a selectable aperture size for COMPLETE color analysis.

Comparable printing challenges can be found in packaging and advertising media associated with hair products, beauty products, clothing & fashion products etc. This system is valuable to both the suppliers & buyers of printed materials.

  • Suppliers can use this system to certify complete compliance to accepted standards (i.e. proofs).
  • Buyers can use this system to verify complete compliance to accepted standards (i.e. proofs).
  • No more questioning or debating colors.
  • Stop relying on somebody's eyes to insure color quality.
  • Measure it!

Model 600 Sample Printout - Can also be used as a Certificate of Compliance. Click the image below for a larger view

Full Frame Color Difference

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.

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