The cooking process should bring the water to a full rolling boil for at least one minute before adding the food item (for example, making pasta). If the water will be at a slight boil for a long time, then this will also be protective. For example, you may be cooking beans or boiling chicken for 10 - 20 minutes.
While it varies based on the type of products used and the efficiency of the stylist, it usually takes around 1 1/2 to 2 hours to get hair colored at a salon, according to a poll by Glamour magazine....
How Long Does Hair Dye Allergy Last? Allergic reaction to hair dyes can appear from a few minutes to up to a week to ten days after the initial exposure to the hair dye. Some individuals' reactions get better in a few days, whereas some have symptoms for a longer period of time.