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....
Quick Answer. After using L'Oreal Feria dyes, hair can be colored by another permanent dye. If changing hair color entirely, wait four weeks between colorings to prevent hair damage. Root touch-ups between colorings are a good way to maintain color without causing damage. Continue Reading.