IPC-4562A-WAM1 covers metal foils supported by carrier films and unsupported foils suitable for subsequent use in printed boards. The Amendment 1 that has been inserted into the base document added back the light cold rolled-wrought copper foil (/6 [Cu-W6] that was previously removed during the revision A actions. Unless otherwise agreed upon between the user and supplier (AABUS), metal foils shall be considered acceptable, so long as the requirements in this specification are met.