ASTM D6166-12(2022) PDF

Overview

ASTM D6166-12(2022): Standard Test Method for Color of Pine Chemicals and Related Products (Instrumental Determination of Gardner Color) specifies a quantitative procedure to measure the color of clear, yellow, or brown liquid pine chemical products. This internationally recognized standard applies to items such as tall oil, tall oil fatty acids, and rosin, helping ensure consistent quality assessment in the pine chemicals industry using the Gardner color scale.

The test method is designed for use with color measuring instruments, providing enhanced precision in Gardner color determination compared to traditional visual methods as described in ASTM D1544. The method covers products within the Gardner 1 to Gardner 18 color range.

Key Topics

• Instrumental Color Measurement: Utilizes colorimeters or spectrophotometers capable of measuring transmitted color and outputting results directly as Gardner color values or in a convertible color system.
• Applicable Sample Range: Optimized for clear, yellow/brown, liquid pine chemicals-including tall oil, fatty acids, and rosin-within Gardner 1 to 18.
• Measurement Accuracy: Offers superior precision and repeatability versus manual test methods, supporting quality assurance and compliance.
• Sample Preparation: Outlines procedures for both liquid and solid samples, including guidance for safely preparing molten rosin for testing.
• Reporting Requirements: Results are to be presented in Gardner color units to one decimal place, with the testing conditions and any pre-treatment (such as filtration) noted.
• Safety and Compliance: Reminds users to establish and follow appropriate safety, health, and environmental measures before undertaking testing.

Applications

The ASTM D6166-12(2022) standard finds broad application throughout industries working with pine chemical products:

• Quality Control: Ensures color consistency in pine chemicals, which can be critical for further chemical processes or final product specifications.
• Regulatory Compliance: Facilitates compliance with buyer and regulatory standards by providing repeatable, objective Gardner color values.
• Research and Product Development: Supports formulation consistency and process optimization in product development and manufacturing environments.
• Supplier and Customer Communication: Offers a standardized, internationally accepted approach to reporting color in specifications and certificates of analysis.

Industries that benefit from ASTM D6166-12(2022) include chemical manufacturing, resin and adhesive production, and companies involved in pine processing and derivatives.

Related Standards

Several other ASTM and international standards are referenced within ASTM D6166-12(2022) or provide complementary guidance:

• ASTM D1544: Test Method for Color of Transparent Liquids (Gardner Color Scale) - basis for the Gardner color scale and comparator for instrumental results.
• ASTM E308: Practice for Computing the Colors of Objects by Using the CIE System - provides calculation guidelines for chromaticity coordinates.
• ASTM E177: Practice for Use of the Terms Precision and Bias in ASTM Test Methods - informs the precision and reproducibility assessment.
• ASTM E691: Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method.
• World Trade Organization (WTO) TBT Committee Principles: ASTM D6166 was developed in compliance with the principles for international standards.

Practical Value

By adopting ASTM D6166-12(2022), organizations benefit from:

• Objective and universal color measurement for pine chemical products
• Reduced variability and increased reliability in test results
• Consistency in international trade, promoting customer confidence and product acceptance

Keywords: ASTM D6166, Gardner color determination, pine chemicals, rosin, tall oil, instrumental color measurement, tall oil fatty acids, color quality control, ASTM standards, color testing.