Wait, let me check. The ASTM standards have a specific nomenclature. Each standard has a designation, like D618-21, where D is the section, 618 is the standard number, and 21 is the year of publication. So maybe the user is referring to ASTM D618-21. The hyphen is important because in the format Designation: D618-21, the hyphen separates the standard number from the year. The user might have omitted the hyphen and written it as D61821. That makes sense. So the correct designation would be ASTM D618-21.
When manufacturing or using finished leather products—such as footwear, garments, or upholstery—the durability of the surface finish is critical. The leather must flex repeatedly without the finish cracking, peeling, or discoloring. , titled "Standard Test Method for Flexibility and Coating Adhesion to Leather," is the definitive, globally recognized procedure designed to evaluate these crucial performance characteristics.
Plastics are viscoelastic materials. Their mechanical strength, impact resistance, and electrical insulation properties change depending on the amount of moisture they have absorbed and the temperature of their surroundings.
Now, what does ASTM D618-21 cover? Let me confirm. ASTM D618 is the standard practice for conditioning plastics for testing. It outlines the procedures for conditioning plastic materials to control moisture and temperature before testing to ensure reproducible results. The -21 suffix indicates the year of the latest revision, so the 2021 version. Therefore, the user is likely asking about ASTM D618-21, which is the current version of the conditioning practices for plastics. astm d61821 pdf
Plastics are fascinating materials, but their properties—like flexibility, strength, and moisture resistance—are super sensitive to their environment. Enter ASTM D618-21, which acts like a “recipe” for creating consistent conditions before testing. Here’s what it ensures:
Conditioned for a minimum of 40 hours. Thickness > 7 mm: Conditioned for a minimum of 88 hours.
min, then excess water is removed with blotting paper before testing. This simulates wet conditions, which often weaken adhesion. 5. Evaluation and Reporting Wait, let me check
If a specific material standard (like those listed in ASTM D4000) provides different conditioning requirements, that specific standard takes precedence over D618-21.
If you're looking for a guide or additional resources to help with ASTM D6182-21, here are a few:
The ASTM D6182-1 standard is officially known as "Standard Test Method for Determining the Toxicity of Chemicals with the Microtox Model". This test method is designed to evaluate the toxicity of chemicals in a variety of environmental matrices, including water, soil, and sediment. So maybe the user is referring to ASTM D618-21
before testing to evaluate how moisture affects finish adhesion. Assessment
The values stated in SI units are to be regarded as standard. The Testing Procedure
The specimen is submerged in distilled or deionized water for
