ASTM E313 Calculating Yellowness and Whiteness Indices from Instrumentally Measured Color Coordinates

ASTM E313 is a standard test method used to calculate the yellowness and whiteness indices of materials based on instrumentally measured color coordinates. This test method is widely used in industries such as textiles, plastics, paints, and coatings to evaluate the color quality and consistency of materials.


Introduction to ASTM E313

ASTM E313 uses instrumentation-measured color coordinates to provide a standardized process for determining the yellowness and whiteness indices of materials. When comparing different samples or tracking color alterations over time, the yellowness and whiteness indices are crucial metrics for evaluating the look and consistency of materials’ colors. 

The ASTM E313 test method is useful for qualitative characterization, research, development, and specification purposes.

ASTM E313 Test Method

The ASTM E313 test method involves the calculation of yellowness and whiteness indices using color coordinates measured by a spectrophotometer or colorimeter. The test is conducted in the following steps:

Instrument CalibrationThe spectrophotometer or colorimeter is calibrated in accordance with the manufacturer’s recommendations and the sample is inserted into the instrument’s measuring space. A proper measurement mode (reflectance or transmittance) is utilized to determine the sample’s color coordinates.
Calculation of Yellowness and Whiteness IndicesThe yellowness index (YI) and whiteness index (WI) is calculated using the observed color coordinates in accordance with the ASTM E313 standard’s given formulas. The whiteness index measures the degree of white colour, while the yellowness index measures the degree of yellow coloration in the sample.

ASTM E313 Specimens

Specimen DetailsASTM E313 specimens include textiles, plastics, paints, coatings, and other colored materials.
Specimen dimensionsThe general sample size for ASTM E313 is subject to the specimen type and the statistical considerations of the method. 
Specimen preparationSpecimens are injection molded, machine operated, or cut from materials in sheet, plate, slab, or similar form.

ASTM E313 Results

The test method ASTM E313 evaluates the sample’s yellowness index (YI) and whiteness index (WI). These indices offer numerical numbers that show how much the material is colored yellow or white. The outcomes can be utilized for quality assurance, color matching, and analysis of color consistency.

Tests Related to ASTM E313

When it comes to measuring and evaluating color, ASTM E313 is related to other test procedures and specifications like ASTM D2244 for visually assessing color variations and ASTM E308 for calculating tri-stimulus values from spectro-photometric observations. 


Where can I get the astm e313 tested?

You can share your astm e313 testing requirements with MaTestLab. MaTestLab has a vast network of material testing laboratories, spread across the USA and Canada. We support your all material testing needs ranging from specific astm e313 test to various testing techniques.

How much do I need to pay for the astm e313 test?

Please contact us for a detailed quote for your astm e313 testing needs. Cost incurred to carry out different astm e313 testing methodology depends on the type of raw material; number of samples, coupons, or specimens; test conditions, turn around time etc. Costs of some ASTM testing methods start from $100 and the final value depends upon the factors listed above. Please contact us for the best and latest prices.

How many samples are required for astm e313?

The required number of samples or specimens should comply with the procedure given in the astm e313 standard. However, the MaTestLab operations team can assist you for your special requirements once you share your testing details with us.

How much discount can I get on the astm e313 test?

MaTestLab has a vast testing laboratory network, hence we bring you the best testing facilities in a cost-effective way. We offer considerable discounts (15-20%) to our returning customers based on test volume and frequency.

How many days will it take to complete the astm e313 test?

The turnaround time for astm e313 test methodology depends upon the test procedure mentioned in the standard test document. However, we at MaTestLab understand your research requirements and hence try to get your test completed within the least possible time.

Where can I get the astm e313 tested?

You can share your astm e313 testing requirements with MaTestLab. MaTestLab has a vast network of material testing laboratories, spread across the USA and Canada. We support your all material testing needs ranging from specific astm e313 test to various testing techniques.

MaTestLab Inc. offers accessible, quick, and affordable material testing, product testing, and failure analysis services. We support your on-demand testing and expert consultation needs with the help of our extensive network of material testing laboratories situated in the US and other parts of the world.
We offer destructive and non-destructive tests over a range of mechanical, electrical, chemical, thermal, optical, corrosion, radiation, and biological testing methodologies defined by ASTM, ISO and other organizations.
We help you evaluate and ensure your product quality and performance with standard and custom-made testing solutions. All the tests are done at well-equipped testing laboratories using standard testing methods for best output and satisfaction.
Failure analysis ensures high levels of quality in every manufacturing process. We help you with getting the best failure or root cause analysis to determine the cause of the failure. The results help you identify means to prevent failure recurrences.
Process for testing
  • STEP 01

    You share your testing requirements

  • STEP 02

    You share your sample(s)

  • STEP 03

    We deliver your test reports

Get your testing done

Let us known your testing requirements and we will be right back with a solution.

Let us root for each other. Collaborate to grow, expand, and accelerate our businesses.

Please share your requirement with us