AN INVESTIGATION INTO THE EFFECTS OF SKIN BLEACHING, HAIR BLEACHING AND DYEING REAGENTS ON THE BODY OF STUDENTS ( EDUCATION PROJECT TOPICS AND MATERIALS)
CHAPTER ONE
- INTRODUCTION
- BACKGROUND OF THE STUDY
In an effort to beautify one-self. Man has developed and chronologically deviced diverse practices and process of beautification which include Hair Dying, Hair bleaching and skin bleaching, lightening or whitening.
Hair bleaching is essentially a process of lightening the colour of the hair. Chemicals like Hydrogen peroxide is often used in combination with ammonia and a toner to both lighten and change the pigmentation (melanin) or shade of the hair by oxidative destruction.
Going by history, in the 1661 book eighteen books of the secretes of Art. The Romans have been known to be interested in changing hair colour and history revealed that they have created over hundred recipes using natural ingredient. The preparation could only darken hair. Renaissance time, blonde was a popular choice because, it was considered to be angelic and attractive.
In 1907, Euguene Scheller, the founder of L.O. real, created the first synthetic hair dye, but it wasn’t widely sold. Its important can be seen in its application before hairs are dyed so as to achieve a desirable and effective result from the dyeing.
Hair dye or hair colour is defined as a chemical preparation used to change the colour of a persons hair and hair dyeing is the process of chemically changing of the hair colour. Hair dyeing is also useful and important in changing colour of hair of people who have grey hair in which some cultures has historically been considered to be sign of ageing while in some others a sign of wisdom and grace. Younger people may dye or colour their hair as a fashion statement.
There are different types of hair dyeing of which the most common classification are temporary, semi permanent, demi permanent/sometimes called deposit only and permanent.
