| 摘要 |
During the permanent treatment with the acid there is a problem of hair damage, especially of hair tips which are mostly damaged. The procedure of hair protection during permanent treatment and the roller with the ampulla solve this problem making possible hair curling with the effect of acid and at same time hair protection by oil or other haircare products. The preparation is injected into the ampulla (2) before placing it into enterior canal of the roller s body (6). The pin (11) of the piston (3) penetrates the ampulla from which will flow the preparation out, through the microcanals (10) into the gutter ( 9) making contact with layer already moistened by acid for hair curling.
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