| Working Group | Focus Area | Relation to ISO 20457 | | :--- | :--- | :--- | | | Environment, Health & Safety (EHS) – Test methods | Core focus of this article | | TG1 | Terminology | Provides definitions used by TG5 | | TG2 | Process methods & materials | Supplies reference materials for TG5 tests | | TG4 | Data & design | Not directly related to emissions |
TG5, or Toxicological Evaluation, is a critical component of the ISO 20457 standard. It provides guidelines for the toxicological evaluation of medical devices, focusing on the potential biological risks associated with device materials and components. The goal of TG5 is to ensure that medical devices are designed and manufactured to minimize the risk of adverse biological reactions. Iso 20457 Tg5
explicitly reference ISO 20457 to keep everyone on the same page from day one. comparison table | Working Group | Focus Area | Relation
Before ISO 20457, there was no unified global test method to measure these emissions. Manufacturers used proprietary, non-comparable methods. was formed to solve this fragmentation. Their mission was to create a repeatable, scientific protocol that any certified lab could use to evaluate a 3D printer’s safety. explicitly reference ISO 20457 to keep everyone on
is the international standard for tolerances and acceptance conditions of plastic molded parts. Unlike metal machining standards, ISO 20457 accounts for the unique "personality" of plastics—things like thermal expansion, post-molding shrinkage, and moisture absorption. The standard categorizes tolerances into Tolerance Groups (TG1 through TG9) TG1 - TG4:
