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....
Although hair color is dependant on dominant and recessive qualities, predicting hair color is more complex than predicting other genetic traits. Rather than one or the other, hair color is additive, meaning the pigment melanin along with a variety of genes determines how dark your hair will be.