Ad­van­tage ammonia

Hair - - Need To Know -

• Ac­cord­ing to the re­search done by Wella Pro­fes­sion­als, ammonia is one of the best tech­nolo­gies in per­ma­nent hair colours for long last­ing colour per­for­mance and pro­tec­tion needed to main­tain hair’s nat­u­ral sheen and shape. It pro­vides ex­cel­lent grey cov­er­age and pure colour re­sults without com­pro­mis­ing hair vi­tal­ity. Be­ing a small mol­e­cule, ammonia fin­ishes its task and evap­o­rates im­me­di­ately. That ex­plains the strong smell. • Since MEA must be used in a higher con­cen­tra­tion in per­ma­nent hair colour, it also needs higher per­ox­ide lev­els and a longer sat­u­ra­tion time. This means the use of more ox­i­dants, which are re­spon­si­ble for ir­ri­ta­tion and harm to the hair. The main ad­van­tage of MEA over ammonia is re­duc­tion of chem­i­cal smell; how­ever that doesn’t mean su­pe­rior hair pro­tec­tion com­pared to ammonia. • The com­bi­na­tion of a higher con­cen­tra­tion of MEA (v/s a semi-per­ma­nent hair colour) and the fact that it is a heav­ier mol­e­cule, which is harder to wash out, means that it stays on the -hair and can cause more dam­age.

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