Carbonless copy paper

Carbonless copy paper

Carbonless copy paper (CCP), non-carbon copy paper, or NCR paper (No Carbon Required, taken from the initials of its creators, National Cash Register) is a type of coated paper designed to transfer information written on the front onto sheets beneath. It was developed by chemists Lowell Schleicher and Barry Green,[1] as an alternative to carbon paper and is sometimes misidentified as such.

Instead of inserting a special sheet in between the original and the intended copy, carbonless copy paper has micro-encapsulated dye or ink on the back side of the top sheet, and a clay coating on the front side of the bottom sheet. When pressure is applied (from writing or impact printing), the dye capsules rupture and react with the clay to form a permanent mark duplicating the markings made to the top sheet. Intermediary sheets, with clay on the front and dye capsules on the back) can be used to create multiple copies.

Operation

Carbonless copy paper consists of sheets of paper that are coated with micro-encapsulated dye or ink or a reactive clay. The back of the first sheet is coated with micro-encapsulated dye (referred to as a Coated Back or CB sheet). The lowermost sheet is coated on the top surface with a clay that quickly reacts with the dye to form a permanent mark (Coated Front, CF). Any intermediate sheets are coated with clay on top and dye on the bottom (Coated Front and Back, CFB).

When the sheets are written on with pressure (e.g., ball-point pen) or impact (e.g., typewriter, dot-matrix printer), the pressure causes the micro-capsules to break and spill their dye. Since the capsules are so small, the print obtained is very accurate.

Carbonless copy paper was also available in a self-contained version that had both the ink and the clay on the same side of the paper.

Uses

Carbonless copy paper, was first produced by the NCR Corporation. Before this the usual options were to write documents more than once or use carbon paper which was inserted between the sheet being written on and the copy. The paper was commonly used for business stationery requiring one or more copies, such as invoices and receipts. The various copies were often made on paper of different colors (e.g. white original for customer, yellow copy for supplier's records, and other colors for other copies). Carbonless copy paper can be supplied collated in pads or books bound into sets with glue or staples, as loose sets, and as continuous stationery for printers designed to use it.

Dyes and chemicals

The first dye used commercially in this application was crystal violet lactone, which is widely used today. Other dyes and supporting chemicals used are PTSMH (p-toluene sulfinate of Michler's hydrol), TMA (trimellitic anhydride), phenol-formaldehyde resins, azo dyes, DIPN (diisopropyl naphthalenes), formaldehyde isocyanates, hydrocarbon-based solvents, polycyclic aromatic hydrocarbons, polyoxypropylene diamine, epoxy resins, aliphatic isocyanates, Bisphenol A, diethylene triamine, and others. The dyes in carbonless copy papers may cause contact dermatitis in sensitive persons.

Health and environmental concerns

Until the 1970s, when the use of polychlorinated biphenyls (PCBs) was banned due to health and environmental concerns, PCBs were used as a transfer agent in carbonless copy paper.[2][3][4] PCBs are readily transferred to human skin during handling of such papers, and it is difficult to achieve decontamination by ordinary washing with soap and water.[3] In Japan, carbonless copy paper is still treated as a PCB-contaminated waste.[5]

Exposure to certain types of carbonless copy paper or its components has resulted, under some conditions, in mild to moderate symptoms of skin irritation and irritation of the mucosal membranes of the eyes and upper respiratory tract. A 2000 review found no irritation or sensitization on contact with carbonless copy paper produced after 1987.[6] In most cases, good industrial hygiene and work practices should be adequate to reduce or eliminate symptoms. These include adequate ventilation, humidity, and temperature controls; proper housekeeping; minimal hand-to-mouth and hand-to-eye contact; and periodic cleansing of hands.[7]

The University of Florida has found that chronic exposure to carbonless copy paper can be hazardous to a person's health. Scientists there found higher rates of sick leave and illness complaints at the office using large amounts of carbonless copy paper. A study published in Environmental Health Perspectives provides new evidence that exposure to paper dust and carbonless copy paper in office work are related to increased risk of adult-onset asthma.[8]

The average carbonless copy paper contains a high concentration of Bisphenol A (BPA), an endocrine disruptor.[9][10][11][12][13]

In 2001, three employees of a medical center in San Francisco filed a lawsuit against their employer, blaming exposure to carbonless copy paper and other chemicals for their inflammatory breast cancer.[14]

See also

Notes

  1. ↑ "Carbonless Paper Pioneer Lowell Schleicher Dies". Appletonideas.com. Retrieved 2013-11-12.
  2. ↑ de Voogt P, Klamer J C, and Brinkman U A Th (December 1984). "Identification and quantification of polychlorinated biphenyls in paper and paper board using fused silica capillary gas chromatography". Bulletin of Environmental Contamination and Toxicology 32 (1): 45–52. doi:10.1007/BF01607463. PMID 6421348.
  3. ↑ 3.0 3.1 Kuratsune M and Masuda Y (April 1972). "Polychlorinated Biphenyls in Non-carbon Copy Paper". Environmental Health Perspectives (Environmental Health Perspectives, Vol. 1) 1: 61–62. doi:10.2307/3428153. JSTOR 3428153. PMC 1474878. PMID 17539088.
  4. ↑ "NPL Site Narrative for Fox River NRDA/PCB Releases". United States Environmental Protection Agency. Retrieved June 24, 2009.
  5. ↑ "Invitation of proposals concerning to PCB contaminated solid wastes treatment technologies". Hyogo Prefectural Environment Create Center Public Corporation. January 27, 2003. Retrieved February 20, 2008.
  6. ↑ Graves CG, Matanoski GM, Tardiff RG (2000). "Carbonless copy paper and workplace safety: a review". Regul Toxicol Pharmacol 32 (1): 99–117. doi:10.1006/rtph.2000.1408. PMID 11029273.
  7. ↑ "National Institute for Occupational Safety and Health - Carbonless Copy Paper". United States National Institute for Occupational Safety and Health. Retrieved October 13, 2007.
  8. ↑ Jaakkola, Maritta S.; Jouni J.K. Jaakkola (July 2007). "Office Work Exposures and Adult-Onset Asthma". Environmental Health Perspectives (National Institute of Environmental Health Sciences) 115 (7): 1007–1011. doi:10.1289/ehp.9875. PMC 1913573. PMID 17637914.
  9. ↑ Fukazawa h, H. K.; Hoshino, K.; Shiozawa, T.; Matsushita, H.; Terao, Y. (2001). "Identification and quantification of chlorinated bisphenol a in wastewater from wastepaper recycling plants". Chemosphere 44 (5): 973–979. doi:10.1016/S0045-6535(00)00507-5. PMID 11513431.
  10. ↑ Raloff, Janet (October 7, 2009). "Concerned About BPA: Check Your Receipts". Society for Science and the Public. Retrieved October 7, 2009.
  11. ↑ Begley, Sharon (June 29, 2009). "When Studies Collide". Newsweek. Retrieved October 9, 2009.
  12. ↑ Stahlhut; Welshons, W.; Swan, S. (2009). "Bisphenol a data in NHANES suggest longer than expected half-life, substantial nonfood exposure, or both". Environmental health perspectives 117 (5): 784–789. doi:10.1289/ehp.0800376. PMC 2685842. PMID 19479022.
  13. ↑ Takemura; Ma, J.; Sayama, K.; Terao, Y.; Zhu, B.; Shimoi, K. (2005). "In vitro and in vivo estrogenic activity of chlorinated derivatives of bisphenol A". Toxicology 207 (2): 215–221. doi:10.1016/j.tox.2004.09.015. PMID 15596252.
  14. ↑ Lee, Henry K. (December 14, 2001). "Co-workers' rare cancer a mystery". The San Francisco Chronicle. Retrieved November 29, 2009.

References

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