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US 5,667,769 AGranted
Process and arrangement for treating hair and the skins of the head and/or body with CO.sub.2
AssigneeTechnica Entwicklungsgesellschaft mbH & Co. KG
InventorsAlexander Kuckens, Horst Kohl
Life of this patent
Estimating the term…
Abstract
A process and an arrangement for hair care or therapeutic skin treatment are provided which most finely impregnate the heated and running water with CO.sub.2 directly before it is contacted with the hair or skin and which serve for lowering the pH value to values markedly below 7 due to the carbonic acid forming proportionately.
Claims13
A method for hair care comprising the steps of:
- performing a first hair care step such as washing, showering, dying, perming or conditioning, and
- then performing a second hair care step by showering said hair with weakly acidified water prepared by:
- providing a source of running water at a first water pressure and at a pH in the alkaline range,
- providing pure CO.sub.2 gas at a first gas pressure,
- reducing said first water pressure to a second water pressure below said gas pressure while confining said water to flow in a confined stream,
- finely impregnating said water in said confined stream at said reduced water pressure with CO.sub.2 gas at said first gas pressure for direct free exchange with said water so that said CO.sub.2 gas is bound over in said water in a stable manner as H.sub.2 CO.sub.3 to weakly acidify said water at a predetermined pH value, and
- maintaining said predetermined pH value of said weakly acidified water by varying the mount of CO.sub.2 gas introduced into said confined stream as a function of said first water pressure to provide said weakly acidified water for showering in said second hair care step.
4 more elements
The method of treating human hair which hair has been subjected to swelling when being contacted with water having a pH within an alkaline range such as by washing, showering, dyeing, perming, or conditioning;
- wherein weakly acidified water is provided to treat said hair after said hair has been subjected to water having a pH within an alkaline range by the steps of:
- providing a source of running water at a first water pressure and at a pH in the alkaline range,
- providing pure CO.sub.2 gas at a gas pressure which is below said first water pressure,
- reducing said first water pressure to a second water pressure below said gas pressure while confining said water in a walled passageway to flow in a confined stream,
- introducing said pure CO.sub.2 gas under pressure directly into said confined stream of water flowing in said passageway at said second water pressure to finely impregnate said water with CO.sub.2 gas for direct free exchange with said water so that said CO.sub.2 gas is bound over in said water in a stable manner as H.sub.2 CO.sub.3 to weakly acidify said water to a pH range between 5 and 6,
- and then contacting said hair with said weakly acidified water.
3 more elements
Dependencies are inferred from the claim text.