Permanent colours are a blend of a tint and hydrogen peroxide which penetrates the cortex and then is sealed in. The tint combines with your natural hair colour to produce the final shade.
*Going a few shades lighter seems to work better than going darker. Which can look flat and matte.
*In a salon, tell them the history of your hairs as it may effect how the tint takes: the initial treatment is always more expensive then the later touch ups, so its important ti get it right.
*At home, don’t attempt to use a tint ion previously bleached hairs in the hope of improving the colour- it will probably end up looking brassy.
*After tinting, be sure to condition your hairs regularly.
*Tinting will normally need retouching every month depending on hoe different it is from your natural colour.
*Permanent colour need to grow out or be recoloured by an expert.