<P> Wood boards need to be cared for with an edible mineral oil to avoid warping, and should not be left in puddles of liquid . Ideally, they should be suspended freely while drying . Care must be taken when selecting wood, especially tropical hardwood, for use as a cutting board, as some species contain toxins or allergens . </P> <P> Bamboo cutting boards are an alternative to plastic or glass cutting boards, partially because Bamboo is commonly thought to be naturally antimicrobial (although studies show otherwise). During the harvesting process, bamboo is carefully chosen for maturation, markings, and size . The stalk is then cut into specific sizes and sent through a pressing process that strips the stalks into smaller plank - like pieces . Once the bamboo is pliable, a cutting board can be produced from multiple pieces by lamination . </P> <P> Plastic boards are usually called PE (polyethylene) cutting boards, or HDPE (high - density polyethylene plastic), the material of which these boards are made . There are basically two types of HDPE boards being made . One version is made from injection - molded plastic, while the other is HDPE from an extrusion line . </P> <P> There are several certifications of plastic cutting boards, one being NSF, that certifies the plastic has passed requirements to come in contact with food . Unlike wood, plastic has no inherent antiseptic properties . However, unlike wood, plastic boards do allow rinsing with harsher cleaning chemicals such as bleach and other disinfectants without damage to the board or retention of the chemicals to later contaminate food . </P>

What type of plastic are cutting boards made from