This document is formally titled Standard Practice for Conditioning Plastics for Testing . Published by ASTM International, the 2021 revision represents the most current version of this essential guideline. It is a four-page document approved on July 1, 2021, and published in July 2021, falling under the jurisdiction of ASTM Committee D20 on Plastics.
Specimens are conditioned at 23°C and 50% relative humidity . Duration: 40 hours for specimens ≤is less than or equal to 7 mm thick; 88 hours for specimens > 7 mm.
Note: For actual referee testing where disputes must be settled, the stricter tolerances ( ±1∘Cplus or minus 1 raised to the composed with power C RH) are mandatory to minimize variance. The Core Conditioning Procedures (Procedures A to D) astm d61821 pdf
This standard is technically related to ISO 291 , though they differ in content; ISO 291 describes only two standard atmospheres.
For those interested in detailed information about the standard test method, ASTM D6182-1 PDF can be accessed through the ASTM International website or other standards repositories. The PDF document provides comprehensive details on the test method, including the latest revisions and updates. This document is formally titled Standard Practice for
: Both standards focus on stabilizing specimens at a normalized temperature of 23°C and 50% relative humidity.
apply to "wet blue" leather (semi-processed, uncolored leather). ASTM International ⚙️ How the Test Works The test uses a specialized machine called a Bally Flexometer iTeh Standards Preparation Specimens are conditioned at 23°C and 50% relative humidity
Create a conditional baseline for temperature and humidity.
As highlighted in this video on ASTM D618 testing , neglecting this standard can lead to inconsistent, inaccurate test data, rendering the testing process useless. How to Obtain the ASTM D61821 PDF
: Variations are strictly limited. For example, if a temperature tolerance of is required, the humidity tolerance must be within
To maintain the integrity of these procedures, ASTM D618-21 mandates strict control over the laboratory environment: : Defined as relative humidity.