OTHER
ISO 9177-3:2022
ISO 9177-3:2022 is an international standard published by the International Organization for Standardization (ISO) that focuses on mechanical pencils used for technical drawings. Specifically, it covers black leads, particularly the bending strength of HB (Hardness B) leads. It also includes a test method for assessing the bending strength of these leads.
📄 Document
Title: APPLICATION FORM OF ISO 9177-3:2022
📜 Document Instructions:
Please fill the application form and upload required documents online for ISO Certification.
