Chemical hair dye ingredients contribute to both environmental pollution and a variety of health problems. Studies have linked the use of hair dyes to an increase in bladder cancer, dermatitis, depigmentation, rheumatoid arthritis and respiratory ailments.
All permanent hair dyes are made up of two components: colour and developer. Manufacturers produce a wide variety of shades that range from a light white blonde to ash, fire engine red to mahogany, and light brown to cobalt black. The developer contains hydrogen peroxide and ammonia to modify the molecular structure of the hair shaft and allow the large colour molecules to penetrate, while phenylenediamine (PPD, or its derivative names benzenediamine dihydrochloride, or aminoaniline dihydrochloride) permits the colour to bond with the hair. Some permanent hair dyes may also contain coal tar, a potentially detrimental petrochemical, and toxic metals such as lead or mercury as developers.
The researchers discovered that women or men who use permanent dyes once a month for a year or more have twice the risk of developing bladder cancer. Hairdressers or barbers in contact with hair dyes had five times the risk. Permanent dyes contain known carcinogenic substances called arylamines, which are absorbed through the skin during the hair treatment. Genetically, some individuals are able to produce very efficient protective enzymes that render the arylamines harmless and eliminate them quickly through the urine. In others, the process is less effective, and these people are at risk of bladder cancer. Luckily, there is no cancer link between temporary or semi-permanent colouring products.
The PPD in permanent hair tints is a major offender in cases of dermatitis around your scalp, behind your ears or on your face. This condition is also present in men who dye their mustaches, sideburns or beards. Depigmentation is also a PPD side-effect and can continue even after the product is discontinued. Similarly, the glutaraldehyde preservative in the hair conditioner package can cause this result.
PPD creates a greater hazard to hairdressers and barbers because they are continually exposed to the toxic irritant. Even with the use of vinyl or latex gloves, a rash can erupt. The severity of the inflammation depends on the strength of the chemical, the duration and location of exposure, and the condition of the skin at the time of contact. If the hairdresser’s hands are perspiring, they will absorb PPD more readily. As well, many professionals can develop severe respiratory ailments such as asthma and bronchospasm. Some hairdressers and barbers develop anaphylaxis. http://www.ultraimports.com.au/product.php?cid=1
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