SE536967C2 - Test strips for perfume testing - Google Patents

Abstract

The present invention describes a type of test strip for perfume testing. These are characterized by the fact that they have a print made of a thermochromatic material which can change color when heated to temperatures similar to those of the skin. The perfume is applied to the test strip which is then heated until the thermochromatic pressure indicates that it has reached skin temperature. Now, when you smell the test strip, it is capable of closely mimicking perfume fragrance when applied to the skin.

Description

DETAILED DESCRIPTION OF THE INVENTION The test strips of the present invention may be of various shapes and sizes, including all shapes and forms of test strips which are currently used for perfume testing. Some examples are 13x2.2cm, 14x3.5cm, 16x1.7cm, 6x6.2cm, 7.5x5cm, 9.5x6.5cm and 11.5x5cm. Of course, non-square formats can also be used and test strips in the form of "paddle" were used, for example.

Test strips are usually made of paper, although different plastic materials can also be considered, as well as combinations of all of these. In a preferred embodiment of the present invention, the test strips are made of paper. When the paper is of porous quality, it has good absorbent properties.

The paper can be of varying qualities, including all paper qualities used in test strips today. Although test strips are usually white, they may have varying colors. According to the present invention, it will be appreciated that certain paper surfaces may be particularly useful at certain times. When it is desired that the perfume remain on the paper for a long time, the test strip may have a lipo fi l or waxy surface. This enables the customer in the perfume shop to take the test strip with them to test at a later time.

A large variety of thermochromatic materials are known, many of which change color at skin temperature. All of these, including future developments of such materials, can be used and applied to the present invention. Combinations of different thermochromatic materials can also be used. Thermochromatic materials can change between different colors and also between colored and transparent. Thermochromatic materials which change color in the range of 27-35 ° C are useful for the invention and they are preferred which change color in the range of 29-33 ° C. Usually the color change is reversible, the original color returns when the temperature is lowered, and this is preferred.

The print on the test strip can have varying appearance, text, figures, different patterns, etc.

Heating of the test strip can be accomplished in many different ways, using one of an ordinary lamp is very simple. Heating in a weak warm air stream is also a useful option.

EXAMPLES The following examples illustrate the invention without limiting it to them.

Figures and fi gur texts: Figure 1. Skin temperatures on different parts of the body of a naked person at different temperatures in the environment. After: Oelsen, B. W., 1982. Thermal Comfort, Technical Review, Bruel & Kj aer.

Figure 2a. Photo showing how the thermochromatic color changes.

Figure 2b. Schematic image in black and white showing how the thermochromatic color changes. 536 967 Figure 3a. Photo fi showing how the blue thermochromatic color changes.

Figure 3b. Schematic image in black and white showing how the thermochromatic color changes.

Example 1 An orange pattern was painted on a test strip for perfume testing using a thermonochromatic ink. A perfume was sprayed on the test strip which was then gently heated under a larnapa until the color changed (thus reaching body temperature) (Fig. 2a, b). Now there was a clear difference in the scent experience compared to smelling at room temperature, the scent experience more pleasant and richer in nature.

Example 2.

A thin layer of petroleum jelly was applied to a test strip as described in Example 1. A perfume was sprayed on it and the test strip was left at room temperature overnight. When warming up and smelling the next day, there was more odor left compared to a test strip that did not have a layer of petroleum jelly.

Example 3 A test strip with a printed flower was made. The blue color contained a terrnochromatic pigment that changed appearance to a much lighter shade when warmed to body temperature. The perfume was sprayed on the test strip which was then heated. The blue color of the printed flower changed appearance indicating that the test strip had reached body temperature (Fig. 3a, b). When you now smell the perfume on the test strip, there was a clear difference from smelling it at room temperature, the smell was more appealing.

Claims (2)

1. A test strip for fragrance testing bearing a figure and/or text which is made usingtherrnochromic paint or ink, said figure and/or text characterised in that it changescolour when heated above room temperature

2. A test strip according to claim 1 which changes colour in the range 27 - 35 °C and thecolour change being reversible 3 A test strip according to claim 1 which changes colour in the range 29 - 33 °C and thecolour change being reversible 4 A test strip which is made from a paper fully coloured by a therochromatic material,characterised in that the colour changes when the test strip is heated above roomtemperature 5 A test strip according to claim 4 which changes colour in the range 27 - 35 °C and thecolour change being reversible 6 A test strip according to claim 4 which changes colour in the range 29 - 33 °C and thecolour change being reversible 7 A test strip according to any of claims 1, 2 and 3 characterised in that it has alipophilic or waxy surface 8 A test strip according to any of claims 4, 5 and 6 characterised in that it has a lipophilic or waxy surface