WO1999052497A1

WO1999052497A1 - Method and system for making a hair remover composition, and resulting hair remover composition

Info

Publication number: WO1999052497A1
Application number: PCT/FR1999/000891
Authority: WO
Inventors: Sylvie Kaplan
Original assignee: Fred Karon Distribution
Priority date: 1998-04-15
Filing date: 1999-04-15
Publication date: 1999-10-21
Also published as: FR2777458A1; FR2777458B1

Abstract

The invention concerns a hair remover composition comprising the following steps: adding a predetermined volume of lemon juice in a predetermined mass of honey; a step for heating (SC) said mixture in a vessel (1) at an adjustable temperature (Tc). Said heating step (SC) is maintained until a substantially dehydrated paste is obtained, and the method further comprises an adjustment of temperature so as to limit to a predetermined level (HM) the formation of foam at the mixture (9) surface during the heating step (SC).

Description

- 1 -

"METHOD AND SYSTEM FOR MANUFACTURING AN EPILATORY COMPOSITION, AND THE EPILATORY COMPOSITION THUS OBTAINED"

The present invention relates to a method for manufacturing a depilatory composition. It also relates to a system for the implementation of this process, as well as the depilatory composition thus obtained.

The so-called oriental hair removal technique, which uses sugar-based compositions, has been widely practiced for a very long time in many countries. Document CH 670 044 discloses a depilatory composition consisting of a supersaturated solution in water added with citric acid and honey. In this composition, honey is used for its properties of making the skin smooth and of antiseptic. Document FR 2717384 describes a unitary element for preserving depilatory paste for oriental hair removal treatment, and an associated manufacturing method. The composition of this dough includes in particular sugar, honey or other sweet substance, the juice of a lemon and water, and heating over low heat is recommended.

Document US 4832949 describes a process for manufacturing a depilatory composition from a mixture of honey and lemon juice, in which this mixture is heated to a temperature of approximately 124 ° C. and then allowed to cool until a paste is obtained. high viscosity.

Document GB 2157951 also describes a process for manufacturing a depilatory composition from a mixture of honey and lemon juice heated to a recommended temperature of 140 ° C. until forming a liquid which is then cooled to thicken to form a paste which is then worked to obtain a malleable composition. However, it turns out from experience that existing depilatory compositions based on honey and lemon juice - 2 -

are not suitable for easy use by hand, since they are generally very sticky. To reduce the stickiness of these depilatory compositions, it is sometimes used essential oil which is added to the mixture of honey and lemon juice before heating. However, these essential oils used in depilatory compositions seem to be in certain cases at the origin of irritations and allergies especially when these depilatory compositions are used at the level of the intimate parts of the human body.

The object of the present invention is to remedy these drawbacks by proposing a method for manufacturing a depilatory composition designed so as to be easily applied by hand while providing better comfort for the person using this composition than the existing depilatory compositions which make enter their composition of essential oils.

This objective is achieved with a process for manufacturing a depilatory composition, comprising the following steps:

- adding a predetermined volume of lemon juice to a predetermined mass of honey,

- a sequence of heating this mixture in a tank at an adjustable temperature.

According to the invention, the heating sequence is maintained until a substantially dehydrated paste is obtained, and the method further comprises a temperature control so as to limit the formation of foam on the surface of the mixture to a predetermined level. during the heating sequence.

Thus, by obtaining a substantially dehydrated paste, there is a particular depilatory composition which is easy to handle since it is spectacularly less sticky to the fingers than the compositions. - 3 -

previous depilatories. In particular, it is no longer necessary to use an application tool.

To opti ally use the depilatory composition thus obtained, it suffices to rehydrate the composition very slightly and to bring in the vicinity of the temperature of the human body. The optimal level of rehydration depends on the part of the body to be depilated, but a simple humidification of a fraction of the depilatory composition held and kneaded in one hand is sufficient in most of the cases. It is also possible to envisage reheating the depilatory composition with conventional heating systems.

Furthermore, by limiting the formation of foam on the surface of the mixture, it effectively contributes to better stability and homogeneity of the final product. In addition to these technical advantages, there is a significant aesthetic advantage concerning the final appearance of the depilatory composition, which can have positive repercussions on purchasing and use decisions by consumers.

In an advantageous version of the method according to the invention, it further comprises stirring the mixture during the heating sequence which is carried out in practice in an oil tank. In the present case, it is a question of providing heating over low heat over a long period of time, in practice from 4 to 8 hours.

Furthermore, it has been observed in practice that better results are obtained when a tank preheating sequence is provided. This is preferably kept open during the heating sequence to effectively contribute to the evaporation of the water initially contained in the mixture.

At the end of the heating sequence, the manufacturing process according to the invention can advantageously - 4 -

understand a sequence of filling containers with dough that is still hot and liquid from the tank. According to another aspect of the invention, there is provided a system for manufacturing a depilatory composition, implementing the method according to the invention, comprising means for heating a mixture of honey and lemon juice to an adjustable temperature during a predetermined duration, characterized in that it further comprises means for supplying electrical energy to the heating means, arranged to supply these heating means until a substantially dehydrated paste is obtained.

According to an advantageous embodiment, the manufacturing system according to the invention may also comprise means for detecting the formation of foam on the surface of the mixture during heating, these detection means cooperating with the heating control means for limit the formation of foam on the surface of the mixture to a predetermined level. According to yet another aspect of the invention, there is provided a depilatory composition obtained with the method according to the invention.

This depilatory composition can also be characterized by an initial mixture of honey and lemon juice produced in such a way that for a mass of approximately 1 kilogram of honey approximately 20 cm ³ of lemon juice is added.

A depilatory composition is thus obtained which is practical to use and which is particularly easy to apply by hand without requiring an application tool.

The present invention will be better understood in the light of the description which follows. In the accompanying drawings:

- Figure 1 illustrates a non-limiting embodiment of a manufacturing system according to the invention; and - 5 -

- Figure 2 shows a simplified timing diagram of the manufacturing process according to the invention.

We will now describe an example of implementation of the method for manufacturing a depilatory composition according to the invention, together with a corresponding manufacturing system, with reference to the aforementioned figures.

The manufacturing system S comprises, by way of nonlimiting example, a tank 1 equipped with an electric oil heating device 2 providing high thermal inertia, a stirring device 4, a temperature sensor 12 , and a drain valve 8. The manufacturing system S further comprises an equipment 5 for supplying liquid honey and an equipment 6 for supplying lemon juice placed for example above the tank 1, a device 3 for supply of electrical power to the heating device 2 from a source of electrical energy, and a control and processing device 10. The manufacturing system S according to the invention can also advantageously comprise a device 11 for foam level detection arranged to generate a signal indicative of the foam level above the surface of the mixture 9. The control and processing device 10 is constructed for example around a microcontroller and arranged to control the electrical energy supply device 3 according to a control strategy implemented in the microcontroller and taking into account the temperature information T and the foam level height information H.

The manufacturing method according to the invention is implemented in the form of a set of sequences comprising a sequence SP of preheating the tank 1, for example with a duration τp of 2 hours to reach a higher nominal heating temperature at 100 ° C - 6 -

starting from an ambient temperature To, a sequence SM of filling the tank 1 with a mixture 9 of liquid honey and lemon juice, a sequence SC of heating with a duration τc of between 4 and 8 hours depending on the mass of treated mixture, a sequence SV for emptying the tank 1 and filling containers C of appropriate size while the composition is still at a temperature close to the nominal heating temperature Te, then a sequence SR for cooling the depilatory composition to inside the containers up to room temperature.

During the heating sequence SC, the control and processing device 10 regulates the temperature around the nominal heating temperature Te, for example around 180 ° C., also taking into account the information of foam level. Thus, when the detection device 11, which can advantageously be developed from known optical or optoelectronic technologies, detects that the average height of foam 7 above the surface of the mixture 9 reaches or exceeds a predetermined maximum level HM, it generates a detection signal which is processed by the control and processing device so as to decrease the heating temperature by reducing the power supply to the heating device 2. As soon as the level of foam has returned to a level considered acceptable, the control and processing device 10 can again control an increase in the heating temperature. Of course, conventional techniques for controlling thermal inertia systems can be implemented to achieve optimal regulation of the heating sequence.

By way of nonlimiting example, for the production of the initial mixture, lemon juice is added to a - 7 -

mass of honey in a proportion corresponding to approximately

20 cm ³ of lemon juice in 1 kg of honey.

A depilatory paste is then obtained which can be applied by hand to the epidermis of a patient. It should be noted that honey is a healing and calming product and that lemon helps slow hair regrowth.

Of course, the invention is not limited to the example which has just been described and numerous modifications can be made to this example without departing from the scope of the invention. In particular, the heating time depends directly on the mass of dough and the technical characteristics of the oil tank used.

Furthermore, the relative quantities of lemon juice and honey can be appreciably adjusted around the recommended values according to specific requests.

Claims

1. Method for manufacturing a depilatory composition, comprising the following steps: - adding a predetermined volume of lemon juice to a predetermined mass of honey,

a heating sequence (SC) of this mixture (9) in a tank (1) at an adjustable temperature (Te), characterized in that this heating sequence is maintained until a substantially dehydrated paste is obtained, and in that it further comprises an adjustment of the temperature so as to limit to a predetermined level (HM) the formation of foam on the surface of the mixture (9) during the heating sequence (SC).

2. Method according to claim 1, characterized in that it further comprises stirring the mixture (9) during the heating sequence (SC).

3. Method according to claim 2, characterized in that it further comprises a preheating sequence (SP) of the tank (1).

4. Method according to claim 3, characterized in that the tank (1) containing the mixture (9) is kept open during the heating sequence (SC).

5. Method according to one of the preceding claims, characterized in that it comprises, at the end of the heating sequence (SC), a filling sequence (SV) of containers (C) with dough which is still hot and in the liquid state coming from the tank (1).

6. Method according to any one of the preceding claims, characterized in that, for a mass of honey about 25 kilograms, the duration of the heating sequence (SC) is between 4 and 8 hours.

7. System (S) for manufacturing a depilatory composition, implementing the method according to any one of the preceding claims, comprising means (2) for heating a mixture (9) of honey and lemon juice to an adjustable temperature (Te) for a predetermined period, characterized in that it further comprises means (3) for supplying electrical energy to the heating means, arranged to supply the heating means until a paste is obtained substantially dehydrated.

8. System (S) according to claim 7, characterized in that it further comprises means (11) for detecting the formation of foam (7) on the surface of the mixture (9) during heating, these means detection (11) cooperating with the means for supplying electrical energy (3) to limit the formation of foam (7) on the surface of the mixture (9) to a predetermined level (HM).

9. System according to claim 8, characterized in that it further comprises control and processing means (10) implementing a temperature control strategy during manufacture, these control and processing means (10) being connected to means (12) for measuring the temperature in the tank (1) and to the foam formation detection means (11).

10. depilatory composition obtained with the method according to any one of claims 1 to 7.

11. depilatory composition according to claim 9, characterized in that the initial mixture of honey and - 10 -

lemon juice is made so that for a mass of about 1 kilogram of honey about 20 cm ³ of lemon juice is added.