Carbonless copy paper (CCP), non-carbon copy paper, or NCR paper (No Carbon Required, taken from the initials of its creator, 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, as an alternative to carbon paper and is sometimes misidentified as such.
Carbonless copying provides an alternative to the use of carbon copying. 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 duplicate 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; this may be referred to as multipart stationery.
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 release their dye. Since the capsules are so small, the resulting print 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.
Carbonless copy paper was first produced by the NCR Corporation, applying for a patent on June 30, 1953. Formerly, the options were to write documents more than once or use carbon paper, which was inserted between the sheet being written upon and the copy. Carbonless paper was used as business stationery requiring one or more copies of the original, such as invoices and receipts. The copies were often paper of different colors (e.g., white original for customer, yellow copy for supplier's records, and other colors for subsequent copies). Stationery with carbonless copy paper can be supplied collated either in pads or books bound into sets, or as loose sets, or 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 (diisopropylnaphthalenes, 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. 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. In Japan, carbonless copy paper is still treated as a PCB-contaminated waste.
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. 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.
In a 1997 study, the University of Florida found that a poorly-ventilated office where large amounts of carbonless copy paper were used had significant levels of volatile organic compounds present in its air, whereas a well-ventilated office where little such paper was used did not. The study also found that there were higher rates of sick leave and illness complaints at the office using large amounts of carbonless copy paper. Another study, which was published in Environmental Health Perspectives, connected chronic occupational exposure to paper dust and carbonless copy paper with an increased risk of adult-onset asthma.
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.
With the increasing adoption of inexpensive inkjet printers and laser printers on computer systems since the 1980s, the use of carbonless multipart forms in businesses has declined, as it is simpler to make copies of documents.
- "Carbonless Paper Pioneer Lowell Schleicher Dies" (PDF). Appletonideas.com. Archived from the original (PDF) on 2013-11-12. Retrieved 2013-11-12.
- US 2730457 Pressure responsive record materials
- de Voogt P; Klamer J C; 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. S2CID 23290658.
- Kuratsune M, 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.
- "NPL Site Narrative for Fox River NRDA/PCB Releases". United States Environmental Protection Agency. Archived from the original on 2015-02-14. Retrieved June 24, 2009.
- "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.
- 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.
- "National Institute for Occupational Safety and Health – Carbonless Copy Paper". United States National Institute for Occupational Safety and Health. Retrieved October 13, 2007.
- Meisenheimer, Karen. "Scientists Test Carbonless Copy Paper For Sickening Side Effects". University of Florida News. Retrieved 3 November 2015.
- Jaakkola, Maritta S.; Jouni J.K. Jaakkola (July 2007). "Office Work Exposures and Adult-Onset Asthma" (PDF). Environmental Health Perspectives. National Institute of Environmental Health Sciences. 115 (7): 1007–1011. doi:10.1289/ehp.9875. PMC 1913573. PMID 17637914. Archived from the original (PDF) on 2009-01-20.
- 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. Bibcode:2001Chmsp..44..973F. doi:10.1016/S0045-6535(00)00507-5. PMID 11513431.
- Raloff, Janet (October 7, 2009). "Concerned About BPA: Check Your Receipts". Society for Science and the Public. Retrieved October 7, 2009.
- Begley, Sharon (June 29, 2009). "When Studies Collide". Newsweek. Retrieved October 9, 2009.
- 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.
- 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.
- Lee, Henry K. (December 14, 2001). "Co-workers' rare cancer a mystery". The San Francisco Chronicle. Retrieved November 29, 2009.