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Black-and-White Processing

In black-and-white photographic processing, exposed film or paper is removed from a light-tight container in a darkroom and sequentially immersed in trays containing aqueous solutions of developer, stop bath and fixer. After a water washing and drying, the film or paper is ready for use. The developer reduces the light-exposed silver halide to metallic silver. The stop bath is a weakly acidic solution that neutralizes the alkaline developer solution and stops further reduction of the silver halide. The fixer forms a soluble complex with the unexposed silver halide, which, together with various water-soluble salts, buffers and halide ions, is subsequently removed from the emulsion in the washing process. Rolls of film are usually processed in closed canisters to which the various solutions are added.

Potential health hazards

Because of the wide variety of formulae used by various suppliers, and different methods of packaging and mixing photoprocessing chemicals, only a few generalizations can be made regarding the types of chemical hazards in black-and-white photoprocessing. The most frequent health issue is the potential for contact dermatitis, which most frequently arises from skin contact with developer solutions. Developer solutions are alkaline and usually contain hydroquinone; in some cases they may contain p-methylaminophenolsulphate (also known as Metol or KODAK ELON) as well. Developers are skin and eye irritants and may cause an allergic skin reaction in sensitive individuals. Acetic acid is the principal hazardous component in most stop baths. Although concentrated stop baths are strongly acidic and may cause skin and eye burns following direct contact, the working-strength solutions are usually slight to moderate skin and eye irritants. Fixers contain photographic hypo (sodium thiosulphate) and various sulphite salts (e.g., sodium metabisulphite), and present a low health hazard.

In addition to potential skin and eye hazards, gases or vapours emitted from some photoprocessing solutions may present an inhalation hazard, as well as contribute to unpleasant odours, especially in poorly ventilated areas. Some photochemicals (e.g., fixers) may emit gases such as ammonia or sulphur dioxide resulting from the degradation of ammonium or sulphite salts, respectively. These gases may be irritating to the upper respiratory tract and eyes. In addition, acetic acid emitted from stop baths may also be irritating to the upper respiratory tract and eyes. The irritant effect of these gases or vapours is concentration dependent and is usually observed only at concentrations that exceed occupational exposure limits. However, because of a wide variation in individual susceptibility, some individuals (e.g., persons with pre-existing medical conditions such as asthma) may experience effects at concentrations below occupational exposure limits. Some of these chemicals may be detectable by odour because of the chemical’s low odour threshold. Although the odour of a chemical is not necessarily indicative of a health hazard, strong odours or odours that are increasing in intensity may indicate that the ventilation system is inadequate and should be reviewed.

Risk management

The key to working safely with photoprocessing chemicals is to understand the potential health hazards of exposure and to manage the risk to an acceptable level. Recognition and control of potential hazards begins with reading and understanding product labels and safety data sheets.

Avoiding skin contact is an important goal in darkroom safety. Neoprene gloves are particularly useful in reducing skin contact, especially in mixing areas where more concentrated solutions are encountered. Gloves should be of sufficient thickness to prevent tears and leaks, and should be inspected and cleaned frequently—preferably thorough washing of the outer and inner surfaces with a non-alkaline hand cleaner. In addition to gloves, tongs may also be used to prevent skin contact; barrier creams are not appropriate for use with photochemicals because they are not impervious to all photochemicals and may contaminate processing solutions. A protective apron, smock or lab coat should be worn in the darkroom, and frequent laundering of work clothing is desirable. Protective goggles also should be used, especially in areas where concentrated photochemicals are handled.

If photoprocessing chemicals contact the skin, the affected area should be flushed as rapidly as possible with copious amounts of water. Because materials such as developers are alkaline, washing with a non-alkaline hand cleaner (pH of 5.0 to 5.5) may aid in reducing the potential to develop dermatitis. Clothing should be changed immediately if there is any contamination with chemicals, and spills or splashes should be immediately cleaned up. Hand-washing facilities and provisions for rinsing the eyes are particularly important in the mixing and processing areas. If concentrated or glacial acetic acid is used, emergency shower facilities should be available.

Adequate ventilation is also a key factor to safety in the darkroom. The amount of ventilation required varies according to room conditions and processing chemicals. General room ventilation (e.g., 4.25 m3/min supply and 4.8 m3/min exhaust, equivalent to ten air changes per hour in a 3 x 3 x 3 m room), with a minimum outside air replenishment rate of 0.15 m3/min/m2 floor area, is usually adequate for photographers who undertake basic black-and-white photoprocessing. The exhaust air should be discharged outside the building to avoid redistributing potential air contaminants. Special procedures such as toning (which involves the replacement of silver by silver sulphide, selenium or other metals), intensifying (which involves making parts of the image darker by the use of chemicals such as potassium dichromate or potassium chlorochromate) and mixing operations (where concentrated solutions or powders are handled) may require supplementary local exhaust ventilation or respiratory protection.

Colour Processing

There are a number of colour processes that are more complex and also involve the use of potentially hazardous chemicals. Colour processing is described in the chapter Printing, photography, and reproduction industries. As with black-and-white photoprocessing, avoiding skin and eye contact and providing adequate ventilation are key factors to safety in colour processing.

 

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Entertainment and the Arts References

American Academy of Orthopedic Surgeons. 1991. Protective equipment. In Athletic Training and Sports Medicine. Park Ridge, IL: APOS.

Arheim, DD. 1986. Dance Injuries: Their Prevention and Care. St. Louis, MO: CV Mosby Co.

Armstrong, RA, P Neill, and R Mossop. 1988. Asthma induced by ivory dust: A new occupational cause. Thorax 43(9):737-738.

Axelsson, A and F Lindgren. 1981. Hearing in classical musicians. Acta Oto-Larynogologica 92 Suppl. 377:3-74.

Babin, A 1996. Orchestra pit sound level measurements in Broadway shows. Presented at the 26th Annual Meeting of the American Public Health Association. New York, 20 November.

Baker, EL, WA Peterson, JL Holtz, C Coleman, and PJ Landrigan. 1979. Subacute cadmium intoxication in jewellery workers: an evaluation of diagnostic procedures. Arch Environ Health 34:173-177.

Balafrej, A, J Bellakhdar, M El Haitem, and H Khadri. 1984. Paralysis due to glue in young apprentice shoemakers in the medina of Fez. Rev Pediatrie 20(1):43-47.

Ballesteros, M, CMA Zuniga, and OA Cardenas. 1983. Lead concentrations in the blood of children from pottery-making families exposed to lead salts in a Mexican village. B Pan Am Health Organ 17(1):35-41.

Bastian, RW. 1993. Benign mucosal and saccular disorders; benign laryngeal tumors. In Otolaryngology-Head and Neck Surgery, edited by CW Cumming. St. Louis, MO: CV Mosby Co.

—. 1996. Vocal fold microsurgery in singers. Journal of Voice 10(4):389-404

Bastian, R, A Keidar, and K Verdolini-Marston. 1990. Simple vocal tasks for detecting vocal fold swelling. Journal of Voice 4(2):172-183.

Bowling, A. 1989. Injuries to dancers: Prevalence, treatment and perception of causes. British Medical Journal 6675:731-734.

Bruno, PJ, WN Scott, and G Huie. 1995. Basketball. In The Team Physicians’s Handbook, edited by MB Mellion, WM Walsh and GL Shelton. Philadelphia, PA: Mosby Yearbook.

Burr, GA, TJ Van Gilder, DB Trout, TG Wilcox, and R Friscoll. 1994. Health Hazard Evaluation Report: Actors’ Equity Association/The League of American Theaters and Producers, Inc. Doc. HETA 90-355-2449. Cincinnati, OH: US National Institute for Occupational Safety and Health.

Calabrese, LH, DT Kirkendal, and M Floyd. 1983. Menstrual abnormalities, nutritional patterns and body composition in female classical ballet dancers. Phys Sports Med 11:86-98.

Cardullo, AC, AM Ruszkowski, and VA DeLeo. 1989. Allergic contact dermatitis resulting from sensitivity to citrus peel, geriniol, and citral. J Am Acad Dermatol 21(2):395-397.

Carlson, T. 1989. Lights! Camera! Tragedy. TV Guide (26 August):8-11.

Chasin, M and JP Chong. 1992. A clinically efficient hearing protection program for musicians. Med Prob Perform Artists 7(2):40-43.

—. 1995. Four environmental techniques to reduce the effect of music exposure on hearing. Med Prob Perform Artists 10(2):66-69.

Chaterjee, M. 1990. Ready-made garment workers in Ahmedabad. B Occup Health Safety 19:2-5.

Clare, PR. 1990. Football. In The Team Physicians’s Handbook, edited by MB Mellion, WM Walsh, and GL Shelton. St. Louis, MO: CV Mosby Co.

Cornell, C. 1988. Potters, lead and health—Occupational safety in a Mexican village (meeting abstract). Abstr Pap Am Chem S 196:14.

Council on Scientific Affairs of the American Medical Association. 1983. Brain injury in boxing. JAMA 249:254-257.

Das, PK, KP Shukla, and FG Ory. 1992. An occupational health programme for adults and children in the carpet weaving industry, Mirzapur, India: A case study in the informal sector. Soc Sci Med 35(10):1293-1302.

Delacoste, F and P Alexander. 1987. Sex Work: Writings by Women in the Sex Industry. San Francisco, CA: Cleis Press.

Depue, RH and BT Kagey. 1985. A proportionate mortality study of the acting profession. Am J Ind Med 8:57-66.

Dominguez, R, JR DeJuanes Paardo, M Garcia Padros, and F Rodriguez Artalejo. 1987. Antitetanic vaccination in a high-risk population. Med Segur Trab 34:50-56.

Driscoll, RJ, WJ Mulligan, D Schultz, and A Candelaria. 1988. Malignant mesothelioma: a cluster in a Native American population. New Engl J Med 318:1437-1438.

Estébanez, P, K Fitch, and Nájera 1993. HIV and female sex workers. Bull WHO 71(3/4):397-412.

Evans, RW, RI Evans, S Carjaval, and S Perry. 1996. A survey of injuries among Broadway performers. Am J Public Health 86:77-80.

Feder, RJ. 1984. The professional voice and airline flight. Otolaryngology-Head and Neck Surgery, 92(3):251-254.

Feldman, R and T Sedman. 1975. Hobbyists working with lead. New Engl J Med 292:929.

Fishbein, M. 1988. Medical problems among ICSOM musicians. Med Prob Perform Artists 3:1-14.

Fisher, AA. 1976. “Blackjack disease” and other chromate puzzles. Cutis 18(1):21-22.

Frye, HJH. 1986. Incidence of overuse syndrome in the symphony orchestra. Med Prob Perform Artists 1:51-55.

Garrick, JM. 1977. The frequency of injury, mechanism of injury and epidemiology of ankle sprains. Am J Sports Med 5:241-242.

Griffin, R, KD Peterson, J Halseth, and B Reynolds. 1989. Radiographic study of elbow injuries in professional rodeo cowboys. Phys Sports Med 17:85-96.

Hamilton, LH and WG Hamilton. 1991. Classical ballet: Balancing the costs of artistry and athleticism. Med Prob Perform Artists 6:39-44.

Hamilton, WG. 1988. Foot and ankle injuries in dancers. In Sports Clinics of North America, edited by L Yokum. Philadelphia, PA: Williams and Wilkins.

Hardaker, WTJ. 1987. Medical considerations in dance training for children. Am Fam Phys 35(5):93-99.

Henao, S. 1994. Health Conditions of Latin American Workers. Washington, DC: American Public Health Association.

Huie, G and EB Hershman. 1994. The team clinician’s bag. Am Acad Phys Asst 7:403-405.

Huie, G and WN Scott. 1995. Assessment of ankle sprains in athletes. Phys Assist J 19(10):23-24.

Kipen, HM and Y Lerman. 1986. Respiratory abnormalities among photographic developers: A report of 3 cases. Am J Ind Med 9:341-347.

Knishkowy, B and EL Baker. 1986. Transmission of occupational disease to family contacts. Am J Ind Med 9:543-550.

Koplan, JP, AV Wells, HJP Diggory, EL Baker, and J Liddle. 1977. Lead absorption in a community of potters in Barbados. Int J Epidemiol 6:225-229.

Malhotra, HL. 1984. Fire safety in assembly buildings. Fire Safety J 7(3):285-291.

Maloy, E. 1978. Projection booth safety: New findings and new dangers. Int Assoc Electr Inspect News 50(4):20-21.

McCann, M. 1989. 5 dead in movie heliocopter crash. Art Hazards News 12:1.

—. 1991. Lights! Camera! Safety! A Health and Safety Manual for Motion Picture and Television Production. New York: Center for Safety in the Arts.

—. 1992a. Artist Beware. New York: Lyons and Burford.

—. 1992b. Art Safety Procedures: A Health and Safety Manual for Art Schools and Art Departments. New York: Center for Safety in the Arts.

—. 1996. Hazards in cottage industries in developing countries. Am J Ind Med 30:125-129.

McCann, M, N Hall, R Klarnet, and PA Peltz. 1986. Reproductive hazards in the arts and crafts. Presented at the Annual Conference of the Society for Occupational and Environmental Health Conference on Reproductive Hazards in the Environment and Workplace, Bethesda, MD, 26 April.

Miller, AB, DT Silverman, and A Blair. 1986. Cancer risk among artistic painters. Am J Ind Med 9:281-287.

MMWR. 1982. Chromium sensitization in an artist’s workshop. Morb Mort Weekly Rep 31:111.

—. 1996. Bull riding-related brain and spinal cord injuries—Louisiana, 1994-1995. Morb and Mort Weekly Rep 45:3-5.

Monk, TH. 1994. Circadian rhythms in subjective activation, mood, and performance efficiency. In Principles and Practice of Sleep Medicine, 2nd edition, edited by M. Kryger and WC. Roth. Philadelphia, PA: WB Saunders.

National Institute for Occupational Safety and Health (NIOSH). 1991. Environmental Tobacco Smoke in the Workplace: NIOSH Current Intelligence Bulletin 54. Cincinnati, OH: NIOSH.

Norris, RN. 1990. Physical disorders of visual artists. Art Hazards News 13(2):1.

Nubé, J. 1995. Beta Blockers and Performing Musicians. Doctoral thesis. Amsterdam: University of Amsterdam.

O’Donoghue, DH. 1950. Surgical treatment of fresh injuries to major ligaments of the knee. J Bone Joint Surg 32:721-738.

Olkinuora, M. 1984. Alcoholism and occupation. Scand J Work Environ Health 10(6):511-515.

—. 1976. Injuries to the knee. In Treatment of Injuries to Athletes, edited by DH O’Donoghue. Philadelphia, PA: WB Saunders.

Pan American Health Organization, (PAHO). 1994. Health Conditions in the Americas. Vol. 1. Washington, DC: PAHO.

Pheterson, G. 1989. The Vindication of the Rights of Whores. Seattle, WA: Seal Press.

Prockup, L. 1978. Neuropathy in an artist. Hosp Pract (November):89.

Qualley, CA. 1986. Safety in the Artroom. Worcester, MA: Davis Publications.

Ramakrishna, RS, P Muthuthamby, RR Brooks, and DE Ryan. 1982. Blood lead levels in Sri Lankan families recovering gold and silver from jewellers’ waste. Arch Environ Health 37(2):118-120.

Ramazzini, B. 1713. De morbis artificum (Diseases of Workers). Chicago, IL: University of Chicago Press.

Rastogi, SK, BN Gupta, H Chandra, N Mathur, PN Mahendra, and T Husain. 1991. A study of the prevalence of respiratory morbidity among agate workers. Int Arch Occup Environ Health 63(1):21-26.

Rossol, M. 1994. The Artist’s Complete Health and Safety Guide. New York: Allworth Press.

Sachare, A.(ed.). 1994a. Rule #2. Section IIC. In The Official NBA Basketball Encyclopedia. New York: Villard Books.

—. 1994b. Basic Principle P: Guidelines for infection control. In The Official NBA Basketball Encyclopedia. New York: Villard Books.

Sammarco, GJ. 1982. The foot and ankle in classical ballet and modern dance. In Disorders of the Foot, edited by MH Jahss. Philadelphia, PA: WB Saunders.

Sataloff, RT. 1991. Professional Voice: The Science and Art of Clinical Care. New York: Raven Press.

—. 1995. Medications and their effect on the voice. Journal of Singing 52(1):47-52.

—. 1996. Pollution: Consequences for singers. Journal of Singing 52(3):59-64.

Schall, EL, CH Powell, GA Gellin, and MM Key. 1969. Hazards to go-go dancers to exposures to “black” light from fluorescent bulbs. Am Ind Hyg Assoc J 30:413-416.

Schnitt, JM and D Schnitt. 1987. Psychological aspects of dance. In The Science of Dance Training, edited by P Clarkson and M Skrinar. Champaign, IL: Human Kinetics Press.

Seals, J. 1987. Dance surfaces. In Dance Medicine: A Comprehensive Guide, edited by A Ryan and RE Stephens. Chicago, IL: Pluribus Press.

Sofue, I, Y Yamamura, K Ando, M Iida, and T Takayanagi. 1968. N-hexane polyneuropathy. Clin Neurol 8:393-403.

Stewart, R and C Hake. 1976. Paint remover hazard. JAMA 235:398.

Tan, TC, HC Tsang, and LL Wong. 1990. Noise surveys in discotheques in Hong Kong. Ind Health 28(1):37-40.

Teitz, C, RM Harrington, and H Wiley. 1985. Pressure on the foot in point shoes. Foot Ankle 5:216-221.

VanderGriend, RA, FH Savoie, and JL Hughes. 1991. Fracture of the ankle. In Rockwood and Green’s Fractures in Adults, edited by CA Rockwood, DP Green, and RW Bucholz. Philadelphia, PA: JB Lippincott Co.

Warren, M, J Brooks-Gunn, and L Hamilton. 1986. Scoliosis and fracture in young ballet dancers: Relationship to delayed menarcheal age and amenorrhea. New Engl J Med 314:1338-1353.

World Health Organization (WHO). 1976. Meeting on Organization of Health Care in Small Industries. Geneva: WHO.

Zeitels, S. 1995. Premalignant epithelium and microinvasive cancer of the vocal fold: the evolution of phonomicrosurgical management. Laryngoscope 105(3):1-51.