- Paper cut
A paper cut occurs when a piece of
paper or other thin, sharp material slices a person'sskin .Paper cuts, though named from paper, can also be caused by other thin, stiff materials, such as
aluminium foil , thin blades ofgrass , or film negatives.Although a loose paper sheet is usually too soft to cut, it can be very thin (sometimes as thin as a
razor edge), being then able to exert high levels ofpressure , enough to cut the skin. Paper cuts are most often caused by paper sheets that are strongly fastened together (such as brand new paper out of aream ), because one single paper sheet might be dislocated from the rest. Thus all the other sheets are holding this dislocated sheet in position, and the very small part held away from the rest can be stiff enough to act as a razor.Paper cuts can cause surprisingly acute
pain since they usually stimulate a large number of skin surfacepain receptor s (nociceptor s) in a very small area of the skin. Because the shallow cut does not bleed very much, the pain receptors are left open to theair , ensuring continued pain. This is exacerbated by irritation caused by the fibers in the paper itself, which may be coated in chemicals such asbleach . Additionally, most paper cuts occur in thefinger s, which have a greater concentration ofsensory receptor s than the rest of the body.The random orientation of
collagen fibers in skin provides the ability to withstand pinpoint forces. However, skin does not have the same strength against shearing forces, and is easily cut. The same principle can be applied to performers that stand on blades.A drop of '
liquid bandage ' or equivalent onto a papercut can seal the skin to stop pain as well as prevent further opening of the wound (as is common on a location such as a finger).External links
* [http://amos.indiana.edu/library/scripts/papercuts.html A Moment of Science: Paper Cuts]
* [http://www.libraryspot.com/know/papercuts.htm Why are paper cuts so painful in relation to their size and appearance?]
* [http://www.onlineart.us/papercut/index.htm Paper cut article]
* [http://www.wonderquest.com/paper-cuts.htm Air exposure makes paper cuts hurt]
* [http://www.mothernature.com/Library/Bookshelf/Books/48/153.cfm The Doctors Book of Home Remedies II: Paper Cuts]
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