Invitations Envs
Carbon paper
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Carbon paper, not paper or carbonless copy paper is an alternative to carbon paper used to make a copy of an original, handwritten document without the use of electronics. The process has been developed by chemists Lowell Schleicher and Barry Green has discovered, while working for NCR Corporation, a biodegradable, stain-free alternative carbon paper. product literature early piggyback on the name of the company NCR No Carbon Required paper calling the paper.
Operation
carbonless paper works in a straightforward manner. It consists of leaves on the bottom and / or upwards with the micro-encapsulated dye or ink and / or a reactive clay coated.
The back of the first sheet is coated with a microencapsulated dye. The tip of the leaf middle is a tone that reacts rapidly with a dye-coated with a permanent marker. The back of the sheet medium is coated with the dye. The bottom plate is covered on top with its uncoated on the back.
If someone writes on the sheets, the pressure on the site of the writing instrument causes micro-capsules to break and spill their dye. Since the capsules are so small, the pressure is obtained very accurately.
Carbon paper was in a self-contained version that had both the color and tone on the same side of the paper.
Dyes and Chemicals
The first dye in commerce in this application was used crystal violet, which still common measure. Other dyes and chemicals used are supported PTSMH (p-toluene sulfinate of Michler hydrolysis), TMA (trimellitic anhydride), phenol-formaldehyde, azo dyes, DIPN (naphthalenes diisopropyl), formaldehyde, isocyanates, hydrocarbon solvents, polycyclic aromatic hydrocarbons, polyoxypropylene diamine, epoxy resins, isocyanates aliphatic, bisphenol A, diethylenetriamine, and others. The dyes in carbonless paper may contact dermatitis in sensitive individuals.
Health and environmental concerns
Until the 1970s, as has been the use of polychlorinated biphenyls (PCBs) banned because of health and environmental concerns of PCBs were used as a transfer agent of carbon paper. PCBs are easily transferred the human skin in the treatment of these documents, and it is difficult to obtain decontamination by washing with soap and water. In Japan, Carbon paper is still treated as waste contaminated with PCBs.
The exposure time leads to certain types of carbon paper or its components, has, under certain conditions, mild to moderate skin irritation and irritation of the mucous membranes of the eyes and respiratory tract higher. In most cases, good hygiene and work practices to reduce or eliminate the symptoms adequately. This including ventilation, controls moisture and temperature, good housekeeping, minimum share-to-mouth contact and hand-eye and cleaning Regular hand.
The University of Florida found that chronic exposure to carbonless dangerous for the health of a person. Scientists [who?] Find more disease problems and illness in the office with large amounts of carbon paper. In addition, a study published in Environmental Health Perspectives provides new evidence that exposure to paper dust and carbonless paper in office work, higher asthma, diabetes, age-related.
See also
Spirit duplicator machine AKA Ditto
dual process list
National Geographic http://www.thegreenguide.com/doc/ask/carbonless
References
^ Http: / / www.appletonideas.com / pdf / Lowell_Schleicher_Dies.pdf
^ De Voogt P, Klamer JC, and Th Brinkman UA (December 1984). "Identification and quantification of polychlorinated biphenyls in paper and paperboard chromatography with fused silica capillary gas" Bulletin of Environmental Contamination and Toxicology 32 (1) 4552 Doi: .. 10.1007/BF01607463.
Kuratsune ^ M & Y Masuda (April 1972). "Polychlorinated Biphenyls in the non-carbon paper" Environmental Health Perspectives 1:. 6162nd doi:. PMID 17539088 10.2307/3428153 e
^ "Call for Proposals for solid waste contaminated PCB technology "between them. Hyogo Center Public Corporation. 27/01/2003. Http: / / www.env.go.jp / en / recycle / ill_dum / pcb / index.html. Accessed 20/02/2008.
^ "The National Institute for Occupational Safety and Health – carbon paper. United States National Institute for Occupational Safety and Health. http://www.cdc.gov/niosh/topics/ccp/. Accessed 13/10/2007.
^ Jaakkola, Maritta S.; Jouni JK Jaakkola (July 2007). "Office work exposures and "….( Asthma in adults and so on) to more information you can find certain products by the Machine Fashion Flowers, crack repair machine. The Hot Filler Rinser Filler Capper Monobloc and fully automatic are produced here for details!
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