Spray on hair dye, a modern hair coloring method, is a type of hair dye that comes in an aerosol can and is applied directly to the hair. It is a convenient and easy-to-use alternative to traditional hair dyes, which require mixing and application with a brush.
Spray on hair dye has become increasingly popular due to its convenience and the wide range of colors available. It is also a good option for those who want to avoid the harsh chemicals found in some traditional hair dyes. One of the key historical developments in spray on hair dye was the invention of the aerosol can in the 1940s, which made it possible to package and apply hair dye in a spray form.