Each session usually lasts 15 - 20 minutes. Treatments should be placed 4 - 8 weeks apart to allow your body to remove the maximum amount of pigment cells. You will continue to see a lightening of your lesion after each treatment as your body disposes of the pigment cells.
Definition of soda pop. : a beverage consisting of soda water, flavoring, and a sweet syrup.
Soda ash, also known as sodium carbonate (Na2CO3), is an alkali chemical refined from the mineral trona or naturally occurring sodium carbonate-bearing brines (the soda ash from both is referred to as natural soda ash) or manufactured from one of several chemical processes (the soda ash from this process is referred to as synthetic soda ash).