This analysis measures the optical properties of whiteness, brightness and yellowness for minerals such as kaolin, talc, barite, calcium carbonate, silica and others.
It is essential for grade classification, especially for applications in ceramics, paint, plastics, paper and refractory industries where optical purity affects commercial value.
Our results help mineral producers determine suitability for industrial specifications, optimize processing conditions and ensure consistent product quality in line with international standards.
Raw mineral samples are received, documented and screened. Where applicable, basic physical parameters (e.g., moisture, particle size) may also be noted.
Solid samples, such as minerals, are prepared by cutting to obtain a flat, clean and representative surface. The sample must fit securely within the instrument’s sample port to ensure consistent and accurate measurements. Powdered mineral samples are placed into a petri dish to create a smooth and uniform surface. For firing whiteness analysis, samples must be heated in a furnace prior to measurement.
We utilize spectrophotometers to analyze the whiteness, brightness and yellowness of materials, ensuring precise and consistent color quality for various industries.
Clients receive a Certificate of Analysis (CoA) with precise index value for whiteness, brightness and yellowness, providing reliable documentation for quality assurance, mineral grading and export purposes.
We accept a wide range of materials, including minerals (e.g., kaolin, calcium carbonate, barite, rocks), paper, textiles, plastics, coatings, and powder samples.
This analysis is particularly essential in the minerals industry, where it supports accurate grade classification and quality control. It helps ensure consistent color and purity in mineral products, which is critical for their performance and market value.
Samples should be flat or shaped to fully cover the 30 mm or 8 mm measurement aperture, depending on the required accuracy. Raw materials can be in the form of loose powder, rock or prepared pellet.
Yes. Whiteness, brightness and yellowness analysis can be requested independently or as part of a broader material characterization package.
Yes. This analysis is often bundled with firing whiteness, chemical composition, sizing and silica content, depending on your project needs.
If you have more questions, our team is here to help. We value your inquiries and aim to provide thorough answers. Don’t hesitate to reach out for assistance.
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