Hair Tints, Rinses and Shampoos are products intended to shade the existing color of the hair. Tints may be used also for applying highlighting effects to the hair. Hair Tints, Rinses and Shampoos contain ingredients that have been extensively tested over many years and have been found to be safe. Their safety is established through the testing of individual dying ingredients as well the other ingredients that are used to formulate the product. In addition to ensuring the safety of the individual ingredients, hair dyes are assessed to make sure that are not irritating or cause an unusual incidence of allergic reactions. The quality of Hair Tints, Rinses and Shampoos is established through rigorous Quality Assurance and Good Manufacturing Practices. Finally, the safety of products is monitored in the market-place through reports of consumer comments and complaints. Companies include a phone number on their products where comments or complaints may be reported.