| 摘要 |
<p>Selective permanent wave process for recently grown hair wherein hair are treated with an aqueous liquid pretreatment agent, rolled on hair-curlers, treated with an aqueous reducing permanent agent, rinsed and fixed by oxidation before continuing the treatment according to the conventional method. The process is characterized in that the pretreatment agent and the permanent wave agent are selected so that they form by contact at the contact surface (upper layers of rolled hair) a separation layer making it difficult or impossible to continue the penetration of the permanent wave agent into the lower layers of the curled hair. The appropriate combinations are for example: pretreatment agents containing either a highly polymer polycarbonic acid polymer of which at least 25 Mol % of those polymers are comprised of monomer units with a free carbonic acid group, or a water soluble aluminium salt in combination with an alkaline permanent wave agent. </p> |
