AATCC LP1-2021 is already familiar to many testing laboratories since it is used for other standards as well; as such, using this standard should be clear and low cost.”

—US CPSC

The revisions address three main areas. First, they aim to clarify and streamline the provisions regarding test result codes (i.e., burn codes), which help determine the classification of a textile and whether it may be used for clothing. The amendments remove an unnecessary code and revise wording in the provisions to clarify the existing requirements. Second, the amendments revise the stop thread specification, which indicates the thread that must be used in flammability testing. The description has become unclear, as threads matching the description in the Standard are no longer readily available. Third, amendments revise the refurbishing requirements in the Standard, which address dry cleaning and laundering specimens during the testing process. In recent years, there have been increasing restrictions on the use of the drycleaning solvent specified in the Standard, and washing machines that meet the specifications required in the Standard are no longer made.

The new refurbishing specifications reference AATCC LP1-2021. The CPSC says, “Staff expects that this will reduce burdens on testing laboratories because it will eliminate the need to maintain and repair older machines and allow those testing laboratories that can no longer maintain or obtain washing machines that comply with the current Standard to continue to test to the Standard.” Existing machines meeting the older specifications in AATCC TM124-2006 may still be used.