Parafilm
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Parafilm is a semi-transparent, flexible film composed of a blend of waxes and polyolefins. It is a ductile, malleable, non-toxic, tasteless, odorless, and self-sealing thermoplastic. It has been manufactured by the company Amcor<ref name="Barbu" /> since its acquisition of Bemis Company, Inc in 2018. It comes in two colors, natural (colorless) and purple.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>
LaboratoriesEdit
Parafilm M is commonly used in health care, pharmaceutical and research laboratories for covering or sealing vessels such as flasks, cuvettes, test tubes, beakers, petri dishes and more.<ref>Template:Cite video</ref> The "M" stands for mounting or maps, as Parafilm was originally used to mount charts and other objects using heat.<ref name="Barbu">Template:Cite magazine</ref><ref>Template:Cite journal</ref> Parafilm M was marketed in 1950s for lab use and for various home applications.<ref name="Barbu"/>
Because it melts quickly when heated, Parafilm M is not safe for use in an autoclave. It is also soluble in many organic solvents.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>
Other applicationsEdit
ProduceEdit
Some growers use Parafilm M instead of fungicides or other coatings to prevent rot, wrapping it around the freshly cut crowns of bananas, pineapples and other produce.
Stem wrapEdit
Florists use Parafilm Stem Wrap to extend the flower's life by protecting moisture in the stem as a floral tape.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>
GraftingEdit
Horticulturalists use Parafilm Grafting Tape in grafting. Several grafting styles call for wrapping a graft to hold it together, and sealing it to prevent drying and Parafilm Grafting Tape does both. In this context Parafilm is also known as grafting tape.
ModelingEdit
Parafilm M is used by some modelers as a masking material during airbrushing, due to its lack of adhesion, which can destroy a finish.
EntomologyEdit
Entomologists have used Parafilm M as a membrane to feed hematophagous insects such as mosquitoes and bedbugs<ref>Template:Cite news</ref> reared in the lab.
MicrofluidicsEdit
An application of Parafilm M is to make paper-based microfluidic devices.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> Paper-based microfluidic devices are considered a suitable way to fabricate low-cost point-of-care diagnostics for developing countries and areas where expensive medical instrumentation is not accessible. Digital microfluidic devices can also use it as the electrode insulator and hydrophobic layer <ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>
Similar productsEdit
A similar but now discontinued product is Fuji's Sealon film.<ref>Template:Cite book</ref><ref>Template:Cite journal</ref>
Another similar product is Seal-R-Film.