Tappi Methods defined

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Tappi 524 is the color test method, which states; (Brief summation)

1. Use 45/0

2. Use C/2

3. report either HunterLab, CIELAB, Yxy or Dom. Wavelength & Purity

CFEZ would comply with this specification for Scales reported using C/2.

Tappi 452 is the direction brightness test method, which states; (Brief summation)

1. Use 45/0

2. Use a combination of filters and illumination to achieve a spectral power distribution defined by the method.

CFEZ Index 457 brightness - while not fully conforming to all aspects of the method does a very close approximation to values produced using a fully compliant instrument assuming the user follows the sample preparation and presentation prescribed in the test method

Tappi 425 is the diffuse Opacity test method, which states; (Brief summation)

1. Use 15/d

2. use A/2

3. Report Opacity or Contrast ratio using an 89% White backing and a Light trap.

UltraScan Vis or Pro Read Method Opacity - while not fully conforming to all aspects of the method does a very close approximation to values produced using a fully compliant instrument assuming the user follows the sample preparation and presentation prescribed in the test method

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