Toilet – Nail device – Compound tools
Patent
1984-08-10
1987-04-28
McNeill, Gregory E.
Toilet
Nail device
Compound tools
424 70, A45D 700
Patent
active
046605800
DESCRIPTION:
BRIEF SUMMARY
The permanent hair shaping in the hitherto known processes occurs in two stages. At first the disulfide bridges of the hair keratin are cracked by means of a suitable reduction substance. Thereafter, the hair is brought into a new shape and is subsequently fixed in the new shape by treatment with a suitable oxidation substance by reestablishing the cracked disulfide compounds.
The compositions used for performing the first reducing process stage contain keratin reducing substance sulfite or certain mercapto compounds as the deforming effective substances, in particular thioglycolic acid, thiolactic acid also in form of their salts with inorganic bases or also thioglycerin or derivatives of these mercapto compounds. These compositions customarily are alkalically adjusted, so as to obtain a hair softening and thereby a rapid penetration of the keratin reducing substance into the hair keratin. Thereby, the required alkalinity is obtained, above all, by adding ammonia, organic amines, ammonium and alkali carbonate, ammonium and alkali hydrogen carbonate. The practical performance for a permanent shaping of human hair is carried out in the following general manner, in that the washed and towel dried hair is at first separated into a pluralities of batches and these batches are then wound onto rollers. After finishing the roller process the rollers are thoroughly moistened with the required amount of the permanent shaping agent. The rollers used for a permamnent wave have a diameter of about 3 to 13 millimeter, while for a hair curling rollers with a diameter of over 13 millimeter are required. The reaction time of the hair shaping composition on the hair for the permanent shaping as well as for the permanent decurling takes about 30 minutes, depending on the condition of the hair and the desired degree of shaping. The reaction time may be shortened by a heat supply, for example, by using a heat radiator or a drying cap.
After the required reaction time of the hair shaping agent the rolled hair is rinsed with water and with a watery solution of an oxidation substance, preferably with a 2% hydrogen peroxide solution by reestablishing the previously cracked disulfide bonds of the hair keratin and is then fixed in the new shape.
Thereby, the reaction time of the fixing substance customarily is about 10 to 15 minutes. Finally, the rollers are removed and the hair is thoroughly rinsed with water.
Since the hair grows by about 1 to 2 cm a month, the permanent shape must be repeated after about 3-4 months. However, very often the hair is still in very good shape from the last permanent shape with respect to its deformation, so that a selective reshaping of the regrown hair at a length of 3 to 8 cm would suffice for reestablishing the hair-do.
However, hitherto no practicable process exists for a separate treatment of the unshaped hair regrowth and the still sufficiently shaped hair length. However, if the shaping treatment is extended to the full length, the already shaped hair portion is particularly subjected to stress, that is, increasingly with respect to the hair tip. Hair damage is not only caused in that the hair toward the tip had been already shaped repeatedly, but mainly because it is exposed longer to environmental influences (for example, sun) and had been more strongly stressed mechanically (for example, by combing).
From German Laid Open Pat. No. 1 467 853 it is known to moisten the hair before rolling it on permanent wave rollers with a liquid preneutralisation composition which contains an oxidation agent and which is additionally adjusted to a pH-value in the acid range. However, a selective treatment of the regrown hair cannot be obtained since the permanent wave liquid penetrates the whole roller. Moreover, the particularly stressed and sensitive hair tips are subjected for a long time to the effect of the oxidation substance and are also damaged in this manner. The use of so-called tip paper (thereby the hair tips are placed between a folded sheet which additionally may be impregnated with hair prot
Hoch Dietrich
Konrad Eugen
Wajaroff Theodor
McNeill Gregory E.
Striker Michael J.
Wella Aktiengesellschaft
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