ASTM C1510Standard Test Method for Color and Color Difference of Whitewares by Abriged Spectrophotometry

Get Certified ASTM C1510 Testing for Reliable Whiteware Color Evaluation

The ASTM C1510 test is used to measure instrumental color and reflection data of ceramic glazes and related whitewares. Qualified staff prepare appropriate flat-surface specimens and use a calibrated hemispherical spectrophotometer or spectrocolorimeter. Analysts choose the correct specular condition, color scale, observer, and illuminant for the evaluation that is required. The results can aid color evaluation, computer colorant formulation, quality control, and comparison of whiteware products.

The scope of ASTM C1510 includes

• Material: Ceramic glazes and other whiteware samples having appropriate external surfaces for instrumental reflectance measurement. 
• Objectives: To find the reflection characteristics, color, and color differences of whiteware materials from instrumental spectrophotometric measurement. 
• Property measurement: Reflectance properties and color coordinates of ceramic glazes and related whiteware. 
• Method: Measure the reflectance of specimens with a spectrophotometer or a spectrocolorimeter in hemispherical optical geometry using an integrating sphere. 
• Result: Get instrumental color coordinates and reflectance data for color assessment, comparison, and associated color-formulation applications. 
• Test limitation: The color measured may be affected by test limitations such as condition of the surface, gloss, uniformity, blemishes, specimen size, optical geometry, calibration, and specular inclusion/exclusion. 
• Environmental conditions: Measurement conditions should be held in the laboratory to enable stable spectrophotometric operation, and, if applicable, specimen handling and conditioning should be controlled. 
• Application: Ceramic glaze color assessment, whiteware quality control, computer colorant formulation, production comparison, and color difference evaluation.

What are the uses of ASTM C1510 testing?

ASTM C1510 offers an instrumental approach to provide objective color data for ceramic glazes and related whitewares. The technique is particularly useful when laboratories require repeatable color coordinates other than visual comparison. This standard-

• Determines the reflective characteristics of ceramic glazes and whitewares. 
• Implements instrumental color coordinates on whiteware specimens. 
• Supports computer colorant formulation. 
• Facilitates accurate measurement of ceramic glaze color. 
• Allows comparison of color between whiteware specimens. 
• Provides a method for considering the effect of specular reflection.  
• Can provide an estimate of gloss by comparing measurements with the specular component included and excluded. 
• Maintains quality control and product development activities.

Which Materials Can Be Tested Under ASTM C1510?

ASTM C1510 is used mainly for exterior flat surfaces, such as ceramic glazes and other whitewares, suitable for the spectrophotometer sample port. The method can be used with different surface finishes, including high-gloss, intermediate-gloss, and low-gloss or matte surfaces. 

Why is ASTM C1510 important?

ASTM C1510 is significant because instrumental color measurement can give objective and repeatable data for the evaluation of ceramics glazes and whitewares. Manufacturers and laboratories can use measured color coordinates to compare specimens, monitor production consistency, and support computer-based colorant formulation.

ASTM C1510 Testing Process and Data Collection 

The ASTM C1510 test determines the reflection property of a ceramic glaze or whiteware specimen by measuring it in hemispherical optical geometry. Analysts use the resulting spectral data to obtain color coordinates under the selected color system, observer, and illuminant. The data record should identify the specimen, instrument, optical geometry, calibration standards, specular condition, color scale, observer, illuminant, measured reflectance data, calculated color coordinates, and any relevant observations. Comparable measurements require consistent specimen positioning and instrument calibration.

Common Challenges and Troubleshooting 

ASTM C1510 measurements can be affected by instrument calibration, specimen uniformity, surface blemishes, gloss, specimen positioning, and selection of the specular measurement condition. The color coordinates may vary depending on whether the specular component is included or omitted from a high-gloss surface. Depending on the optical condition, the differences between instrumental and visual measurements can also be obtained for satin surfaces. Technicians should therefore maintain the required white-standard calibration, select representative and clean measurement areas, position specimens consistently, and document the color scale, observer, illuminant, and specular condition used for every measurement.

• Laboratories report measured reflectance properties and color coordinates, such as CIELAB L, a, and B values, using the selected measurement configuration. 
• Technicians record the primary color result together with specimen identification, surface finish, measurement condition, and relevant instrument settings. 
• Analysts document the spectrophotometer configuration, calibration status, specular inclusion or exclusion, observer, illuminant, and measured spectral or color data. 
• Engineers and analysts compare the measured color and color-difference results with applicable product specifications, reference specimens, formulation targets, or quality-control requirements.

Link to ASTM C1510