ASTM D2371 Standard Test Method for Pigment Content of Solvent-Reducible Paints
ASTM D2371 is the accepted standard test method that provides a method for the determination of pigment content in solvent-reducible paints. The specification is vital to paint companies, quality control laboratories, and users to ensure that the coatings have the desired consistency, durability, and protective performance. The procedure entails the separation of the non-volatile pigment fraction from the volatile and resinous binder fractions by using solvent treatment before measurements of precise accuracy. Through measurement of pigment levels, producers can ensure that the formula conforms to specifications of opacity, color strength, and protective ability. The test offers a reproducible and consistent method to ensure uniformity between batches of production.
Read More
GET STARTED
ASTM D2371 Introduction
The pigments play an important role in solvent-reducible paints, not only to provide color, but also to increase opacity, corrosion resistance, and UV stability. Since the pigment-to-binder ratio directly affects the protective and decorative functions of the coating, accurate measurement is necessary. The ASTM D2371 provides a standardized approach to determine the pigment material in solvent-oriented paints through separation and quantification techniques. The method is widely adopted in both industrial and research settings as it ensures reliability in various types of paints, including alkyd-based, oil-modified, and synthetic resin formulations. By adopting this test, manufacturers can avoid anomalies that lead to poor coating performance or product rejection. This makes ASTM D2371 a foundation stone in paint quality assurance and regulatory compliance.
Get Certified ASTM D2371 for Coating Quality Assurance
ASTM D2371 certification is an assurance that solvent-reducible paints deliver their expectations on formulation and performance in terms of pigment loading. Certification assists in adherence to regulations, better consistency of products, and increases confidence between the coating manufacturers, suppliers, and the end users. It also helps the laboratories to validate the coating composition in the process of research, development, and production.
Service Name
Remarks
ASTM D2371 Testing
Contact US
ASTM D2371 Testing System and Requirements
Sample Weighing
A 2.0 g ± 0.1 g paint sample is accurately weighed using an analytical balance.
Solvent Treatment
The weighed sample is dispersed in xylene or other specified solvents to dissolve the binder content.
Pigment Recovery and Weighing
The insoluble pigment residue is filtered, dried at 105 ± 2 °C, and weighed to determine the pigment fraction.
Scope of ASTM D2371
Identifies the pigments of solvent-reducible paint formulas.
Helps in checking the correctness of formulation and consistency in production.
Favors research and quality control within the industry of paints and coatings.
ASTM D2371 Equipment and Sample Preparation
Analytical Balance
Calibrated to ±0.1 mg accuracy, used for weighing the initial paint sample and dried pigment.
Filtration Apparatus
The glass filter crucible is prepared by drying at 105°C before use to avoid moisture interference.
Specimen Preparation
Approximately 2 g of well-mixed paint is extracted, ensuring homogeneity without skin or clumps.
Applications of ASTM D2371
Checking of pigment loading in the process of paint formulation.
Innovation of new coating systems.
Test of coating make-up in industrial and architectural use.
ASTM D2371 Common Challenges and Troubleshooting
Problems such as dissolution of binder materials not being complete, failure to remove pigment residues, and wasting of pigment particles during filtration are the common ones. The wrong choice of solvent can also influence the separation process. The correct results should be obtained through good mixing of samples, adequate solvent utilization, and proper filtration steps in order to make sure that only solids of pigments are left after the extraction process.
ASTM D2371 Aggregate Testing Technique, Process, and Data Collection
A representative sample of paint is taken and dissolved in the proper solvents of organic nature to separate the constituents of the binder. To collect those pigments that dissolve, the mixture is filtered to isolate the insoluble material. The pigment retained is washed, dried to constant weight, and weighed on an analytical balance. The amount of pigment content is calculated using the ratio of the dry pigment mass to the initial sample mass and is presented as a percentage.
ASTM D2371 Analysis Results and Interpretation
The percentage of pigment calculated is the sum of the insoluble pigment in the paint formula. An increase in the pigment content tends to denote an increase in the color strength, the opacities, and the concentration of the fillers. These results are used to establish compliance of the coating with design standards by the engineers and formulation chemists. Major variances can be a sign of mistakes in the formulation, the wrong proportion of the raw materials, or inconsistency in production.
ASTM D2371 Problem & Solution
Measured pigment loading may cause defects in the coating, which may include low hiding power, color variation, decreased durability, or excessive viscosity. ASTM D2371 offers a standardized technique to determine pigment concentration and thus enable manufacturers to check the consistency of formulation and ensure the performance of the coating.
Factors to Consider for ASTM D2371
Speed Possible solvent solubility, filtration, drying, and weighing are involved in the test and can be done in several hours, depending on the drying conditions.
Expertise Laboratory staff must be trained in the work with solvents, filtration methods, and analytical weighing to get credible results.
Cost The procedure assists in avoiding errors in the formulations and product variation, which finally results in loss on production and preservation of coating quality.
Related
FAQ's
Where can I get the astm d2371 tested?
You can share your astm d2371 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 d2371 test to various testing techniques.
How much do I need to pay for the astm d2371 test?
Please contact us for a detailed quote for your astm d2371 testing needs. Cost incurred to carry out different astm d2371 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 d2371?
The required number of samples or specimens should comply with the procedure given in the astm d2371 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 d2371 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 d2371 test?
The turnaround time for astm d2371 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 d2371 tested?
You can share your astm d2371 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 d2371 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.
MATERIAL TESTING
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.
PRODUCT TESTING
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
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.
