Yes.
It is both a physical and chemical change.
Yes it is a chemical change because color change is an observed change that a chemical change has occurred. So you are very much right. :)
In hair dyeing, the acid breaks down the outer cuticle of the hair, allowing the color molecules to penetrate the hair shaft. This reaction involves the acid opening up the hair cuticle, depositing the dye molecules inside the hair, and then sealing the cuticle back up to lock in the color.
Growing hair is a biological process that involves physical changes. Cells in hair follicles divide and differentiate to produce new cells, which then form hair strands. This process does not involve a chemical reaction that alters the chemical composition of the hair.
Physical, it's not changing your hair into a different substance. Its still hair. To be chemical change you would have to light it on fire or something like that. Something that would change it into something new. Physical changes can always be changed back, like freezing water, it's still water, and will change back when heated or left out. Chemical changes are most always permanent, if you burn paper you arnt going to get that paper back. It's turned into an entirely new substance, ash and smoke
Yes, dyeing hair is a chemical change because the chemical composition of the hair is altered when the hair dye penetrates the hair shaft and reacts with the melanin in the hair. This change is not reversible without cutting or growing out the dyed hair.
Dyeing grey hair to red is a chemical change. The hair dye chemical reacts with the proteins in the hair to change its color permanently.
Cutting hair and shampooing hair are purely physical changes. However curling or straightening hair involve chemical changes too (i.e. sulfur crosslinks move). Dyeing hair is also chemical.
no you must dye it
It is both a physical and chemical change.
Coloring hair is a chemical change because it involves a chemical reaction between the hair dye and the hair strands, altering the composition of the hair.
I would say about 6 monthes
Chemical Change
chemical and physical
Lemon juice or vinegar can be used as a substitute for peroxide in hair dyeing.
Short answer is yes. Dying the hair involves a chemical process, which damages the hair. This causes the texture of the hair to change for a short while and it becomes dry, rough and often normally smooth hair will get knotty.
No, the drying of wet hair is a physical change, not a chemical change. The change in state from wet to dry is due to the evaporation of water and does not involve any chemical reactions altering the composition of the hair.