Shop for Metal and X-ray Detectable Acetal Sheet Copolymer. TECAFORM® AH UD Blue is an FDA compliant acetal copolymer designed for food contact. This multi-detectable food grade blue plastic can be detected by optical scanners, metal detection equipment, and X-ray detection equipment. TECAFORM® AH UD Blue sheet offers good machinability and mechanical properties for applications in food, pharmaceutical, and other industries. Stocked materials typically ship in 2-5 business days. Can’t find what you need? Get a quote.