ASTM D6290 Standard Test Method for Color Determination of Plastic Pellets
ASTM D6290-98e1 facilitates color comparisons of resins in pellet form, offering convenience as it bypasses the need for specimen preparation like molding or extruding. Utilizing a three-number tristimulus system ensures comprehensive and accurate color quantification, following the CIE Systems method. This test best compares pellets with similar characteristics such as shape, size, texture, and translucency. It's important to note that comparisons should be made between pellets of the same type to ensure accuracy.
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ASTM D6290 Introduction
ASTM D6290 measures the degree of yellowness in transparent or translucent plastics under daylight illumination. It utilizes spectrophotometer or colorimeter readings of tristimulus values on pellets. ASTM D6290 is applicable for analyzing the color of plastic pellets, with each material potentially exhibiting unique color characteristics.
ASTM D6290 Test Method
Placement of Pellet Filled Cup at the Sensor Port
The pellets are loaded into the sample cup, which is then positioned at the sensor port for measurement. An opaque, light-excluding device covers the pellet-filled cup during the process.
Yellowness Index Measurement
The Tristimulus X, Y, and Z readings are taken promptly to determine the yellowness index.
D6290 Equipment and Sample Preparation
Specimen Details
ASTM D6290 outlines a convenient and rapid technique for comparing the color of resin pellets without the need for specimen preparation like molding or extrusion. It should only be used to compare specimens with similar pellet shapes, sizes, textures, and translucencies.
Specimen Size
A three-number tristimulus system is essential for accurately quantifying color.
D6290 Test Results and Interpretation
Pellets from each material were collected and packaged by a single source and then distributed to multiple laboratories for testing. Each test result represents a single determination, with six test results obtained by each laboratory for each material.
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ASTM D6290 Testing
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Tests Related to ASTM D6290
ASTM D6290 is related to tests, including ASTM D2244 for calculating color differences and tolerances, the ASTM 179 specification for measuring material transmission and reflection, and ASTM E2935 for performing equivalence tests in labs.
Use of D6290 in Various Industries
This standard is used by a majority of the packaging, automotive, consumer goods, and electronics industries to ensure the color consistency of plastic pellets. This leads to greater brand consistency and quality in the products.
Materials Commonly Tested with D6290
The method, mainly used for thermoplastic pellets such as polyethylene, polypropylene, polyvinyl chloride, and polystyrene, ensures accurate color measurement before molding or extrusion, minimizing defects in various products, including food-grade packaging and industrial parts.
Common Challenges and Troubleshooting in D6290 Testing
Testing is affected by variations in pellet size, surface texture, or contamination, and this affects the accuracy of color measurement. Sample preparation, calibration of the spectrophotometer, and standard lighting conditions are critical measures for troubleshooting.
Safety and Best Practices in D6290 Testing
Operators should handle plastic pellets and laboratory equipment with care, using appropriate PPE. Best practices include regular maintenance, calibration protocols, and controlled environmental conditions to prevent external factors from influencing results, ensuring safety and accuracy during testing.
Importance of D6290
The standard is important for the maintenance of product quality, customer satisfaction, and regulatory compliance in plastic materials industries through the standardization of color measurement, reduction of variability, optimization of processes, and smooth communication of color specification across supply chains.
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How many samples are required for astm d6290?
The required number of samples or specimens should comply with the procedure given in the astm d6290 standard. However, the MaTestLab operations team can assist you for your special requirements once you share your testing details with us.
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How many days will it take to complete the astm d6290 test?
The turnaround time for astm d6290 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 d6290 tested?
You can share your astm d6290 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 d6290 test to various testing techniques.
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