Putting small amount of ammonia in a mixture of bleaching cream is ok. Ammonia cleanse clogged pores thus making your skin younger and tidy.
Is Ammonia Can Use Directly For Skin Whitening?
Ammonia may burn your skin if used directly. Its not healthy for the skin. Please consider using natural products that have bleaching properties. Lemon juice can be used, yogurt also can be used. These contain a mild acid that will bleach the skin. Ammonia application is not good.