WO2005003699A1 - Ultra violet exposure meter - Google Patents

Ultra violet exposure meter Download PDF

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Publication number
WO2005003699A1
WO2005003699A1 PCT/IB2004/051072 IB2004051072W WO2005003699A1 WO 2005003699 A1 WO2005003699 A1 WO 2005003699A1 IB 2004051072 W IB2004051072 W IB 2004051072W WO 2005003699 A1 WO2005003699 A1 WO 2005003699A1
Authority
WO
WIPO (PCT)
Prior art keywords
exposure meter
exposure
colour
meter
degradable substance
Prior art date
Application number
PCT/IB2004/051072
Other languages
French (fr)
Inventor
Max Di Domenico
Original Assignee
Burnshield (Pty) Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Burnshield (Pty) Limited filed Critical Burnshield (Pty) Limited
Publication of WO2005003699A1 publication Critical patent/WO2005003699A1/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/48—Photometry, e.g. photographic exposure meter using chemical effects
    • G01J1/50—Photometry, e.g. photographic exposure meter using chemical effects using change in colour of an indicator, e.g. actinometer
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
    • G01J1/429—Photometry, e.g. photographic exposure meter using electric radiation detectors applied to measurement of ultraviolet light

Definitions

  • This invention relates to a meter for measuring exposure to ultra violet (UV) radiation.
  • UV rays are a part of the wavelength spectrum of rays present in sunlight.
  • the negative effects of UV rays on a surface absorbing or exposed to the UV rays are well known. UV radiation degrades the strength and flexibility of various materials for example rubber, to render it brittle.
  • UV exposure meters are not readily available to the public. UV meters are known in the art, but those are sophisticated and costly and are not accessible to the majority of consumers.
  • a UV exposure meter comprising a body at least part of which is covered with a UV degradable substance which changes colour or colour intensity when exposed to UV radiation.
  • the body is a section of sheet material having two major opposing surfaces, and the UV degradable substance applied on a least part of a first of two major opposing surfaces.
  • the UV degradable substance is an ink having no UV stabilisers added thereto.
  • the section of sheet material is a disc.
  • the disc is round in plan view, alternatively square, rectangular or multi-sided in plan view.
  • An adhesive substance is located on at least part of a second of the two major opposing surfaces.
  • a removable cover sheet is located over the UV degradable substance.
  • a removable backing sheet is located on an adhesive substance on the second major surface of the section of sheet material.
  • Part of the first major opposing surface is covered with a UV resistant material.
  • the UV resistant material is an ink which includes UV stabilisers.
  • the colour intensity of the UV degradable substance undergoes a human discernible change in less than one hour or 50 minutes or 40 minutes or 30 minutes or 20 minutes.
  • This invention extends to a UV exposure kit comprising a body at least part of which is covered with a UV degradable substance which changes colour or colour intensity when exposed to UV radiation, and a gauge section on the body covered with a substance being UV resistant having a colour equal to in intensity, or equal in colour to, the colour of the UV degradable substance after being exposed to a certain amount of UV radiation.
  • the body is a section of sheet material.
  • the UV degradable substance and the UV resistant substance is located on different parts of a first major opposing surface of two major opposing surfaces of the section of sheet material.
  • the gauge section includes a number of different colour or colour intensity zones.
  • the gauge section is a separate strip of material.
  • the different colour intensity zones or different colours correspond to a different predetermined sun protection factor.
  • the section of sheet material is a disc.
  • the disc is multi- sided in plan view, or square or rectangular or multi-sided.
  • An adhesive substance is located on at least part of a second of the two major opposing surfaces.
  • the kit includes a UV impermeable bag.
  • a removable backing sheet is located on an adhesive substance on the second major surface of the section of sheet material.
  • the UV resistant material is an ink which includes UV stabilisers.
  • the colour intensity of the UV degradable substance undergoes a human discernible change in less than one hour, 50 minutes, 40 minutes, 30 minutes or 20 minutes.
  • Figure 1 shows a prospective view of a first embodiment of a UV exposure meter
  • Figure 2 shows a UV exposure meter kit
  • Figure 3 shows a perspective exploded view of a second embodiment of a UV exposure meter.
  • a UV exposure meter is generally indicated by reference numeral 1.
  • the UV exposure meter 1 includes a body in the form of a rectangular section of sheet material 3 which has a first major opposing surface, part of which is covered with a UV degradable ink the colour of which changes upon exposure to UV radiation and a colour coded gauge 2 on the rest of the first surface being covered with a UV resistant ink having a colour resembling the colour that the UV degradable ink will be, after it has been exposed to a predetermined amount of UV radiation.
  • the UV exposure meter 1 is thus a sheet with two separate colour zones.
  • Colour zone 2 is the gauge and the surface thereof contains a substance such a an ink including a UV stabiliser for preventing the colour thereof from changing upon exposure to UV radiation.
  • Colour zone 3 is a UV exposure indicator and the surface thereof is free of UV stabiliser. It is covered with an ink which does not include UV stabilisers. The colour of zone 3 has a darker intensity than that of zone 2. The colour of zone 3 changes and becomes lighter upon exposure thereof to UV radiation.
  • the colour intensities of zones 2 and 3 will be selected such that the colour of zone 3 changes to resemble that of zone 2 upon exposure to a predetermined quantum of UV radiation, which is, for example, the maximum quantum of UV radiation to which the human skin can safely be exposed, or relates to the quantum of radiation at which a suntan lotion, normally applied, and of a certain sun protection factor (SPF) will no longer be effective to protect a user.
  • a predetermined quantum of UV radiation which is, for example, the maximum quantum of UV radiation to which the human skin can safely be exposed, or relates to the quantum of radiation at which a suntan lotion, normally applied, and of a certain sun protection factor (SPF) will no longer be effective to protect a user.
  • the UV exposure meter can be located next to a user to be exposed to the same UV radiation than what the user is exposed to determine the amount of UV radiation to which the user is being exposed to or the time at which a suntan lotion becomes ineffective.
  • the UV exposure meter can also be graded to resemble the degradation of a corresponding suntan lotion having a certain sun protection factor (SPF). Meters may thus be "SPF5" or “SPF15” or so on.
  • FIG. 2 shows a UV exposure kit 10.
  • the kit includes a bag 11 (packaging) which is UV protected to protect the UV meters 13 from UV radiation when inside the bag 11.
  • the meter bodies are in the form of sheet material discs 13 or stickers are releasably attached to a backing sheet 12.
  • the "stickers" 13 which are removable from the plate 12.
  • the stickers have an adhesive on their rear surfaces for attaching them to an object such as a cooler, bottle, umbrella or any object also exposed to the same amount of sunlight as the user of the discs 13.
  • the operative front or upper surface of the discs are covered with UV degradable ink i.e. on ink without UV stabilisers.
  • a gauge 14 in the form of a strip of sheet material includes a number of colour zones 15.
  • the colour zones 15 are formed with UV protected ink so that they do not, at least quickly or easily, changed colour when exposed to UV radiation.
  • Each colour on the gauge represents the colour that the sticker 13 would be after exposure to a certain amount of radiation. These colours are not so much different colours but are rather different intensities of the same colour.
  • Each colour may also represent a point at which a suntan lotion of a certain SPF value would have become ineffective.
  • the user may thus stick one of the stickers 13 on an object exposed to the same amount of sunlight to which the user is exposed, when applying a suntan lotion of a certain SPF.
  • a suntan lotion of a certain SPF When the disc 13 has reached the colour on the gauge corresponding to the same SPF, the user will know that the suntan lotion is no longer effective.
  • FIG. 3 shows a second embodiment of a UV exposure meter 20.
  • the meter includes a meter disc 21 covered with a ink 24 having no UV stabilisers (as with the other meters described above).
  • a front removable cover disc 22 covers the ink 24 to protect the ink 24 from UV radiation when the meter is not in use.
  • a backing disc 23 is also removable from the rear surface of the meter disc 21 to attach the meter disc to an object with the adhesive located on the rear surface of the disc 21.
  • the backing disc 23 and the backing plate 12 of figure 2 may be wax-covered to facilitate easy removal of the discs (21 and 13) with their adhesive therefrom.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)

Abstract

This invention relates to a meter for measuring exposure to ultra violet (UV) radiation. A UV exposure meter includes a body at least part of which is covered with a UV degradable substance which changes colour or colour intensity when exposed to UV radiation. A UV exposure kit includes a body at least part of which is covered with a UV degradable substance which changes colour or colour intensity when exposed to UV radiation, and a gauge section on the body covered with a substance being UV resistant having a colour equal to in intensity, or equal in colour to, the colour of the UV degradable substance after being exposed to a certain amount of UV radiation.

Description

ULTRA VIOLET EXPOSURE METER
Field of the invention
This invention relates to a meter for measuring exposure to ultra violet (UV) radiation.
Background to the invention
Ultra Violet (UV) rays are a part of the wavelength spectrum of rays present in sunlight. The negative effects of UV rays on a surface absorbing or exposed to the UV rays are well known. UV radiation degrades the strength and flexibility of various materials for example rubber, to render it brittle.
Excess exposure of the human skin to UV radiation causes various negative side effects. It is for example known that skin "aging" occurs as a result of excessive UV radiation. An even bigger risk involved in excessive exposure of the human skin to UV is that it may lead to the development of skin cancer.
In spite of these prudent risks, UV exposure meters are not readily available to the public. UV meters are known in the art, but those are sophisticated and costly and are not accessible to the majority of consumers.
Suntan lotions containing chemical compounds, which absorbs or reflects or protects the skin from UV rays are known. However, the compounds which absorbs the UV rays degrade upon prolonged exposure and again, it is difficult to estimate when additional lotion needs to be applied for adequate protection.
Object of the invention It is an object of this invention to provide a UV exposure meter which, at least partially, alleviates some of the disadvantages associated with the prior art.
Summary of the invention
In accordance with this invetion there is provided a UV exposure meter comprising a body at least part of which is covered with a UV degradable substance which changes colour or colour intensity when exposed to UV radiation.
The body is a section of sheet material having two major opposing surfaces, and the UV degradable substance applied on a least part of a first of two major opposing surfaces.
The UV degradable substance is an ink having no UV stabilisers added thereto. The section of sheet material is a disc.
The disc is round in plan view, alternatively square, rectangular or multi-sided in plan view.
An adhesive substance is located on at least part of a second of the two major opposing surfaces. A removable cover sheet is located over the UV degradable substance.
A removable backing sheet is located on an adhesive substance on the second major surface of the section of sheet material.
Part of the first major opposing surface is covered with a UV resistant material.
The UV resistant material is an ink which includes UV stabilisers. The colour intensity of the UV degradable substance undergoes a human discernible change in less than one hour or 50 minutes or 40 minutes or 30 minutes or 20 minutes.
This invention extends to a UV exposure kit comprising a body at least part of which is covered with a UV degradable substance which changes colour or colour intensity when exposed to UV radiation, and a gauge section on the body covered with a substance being UV resistant having a colour equal to in intensity, or equal in colour to, the colour of the UV degradable substance after being exposed to a certain amount of UV radiation.
The body is a section of sheet material.
The UV degradable substance and the UV resistant substance is located on different parts of a first major opposing surface of two major opposing surfaces of the section of sheet material. The gauge section includes a number of different colour or colour intensity zones.
The gauge section is a separate strip of material.
The different colour intensity zones or different colours correspond to a different predetermined sun protection factor.
The section of sheet material is a disc. A UV exposure meter as claimed in claim 25 in which the disc is round in plan view.
The disc is multi- sided in plan view, or square or rectangular or multi-sided. An adhesive substance is located on at least part of a second of the two major opposing surfaces.
The kit includes a UV impermeable bag.
A removable backing sheet is located on an adhesive substance on the second major surface of the section of sheet material.
The UV resistant material is an ink which includes UV stabilisers. The colour intensity of the UV degradable substance undergoes a human discernible change in less than one hour, 50 minutes, 40 minutes, 30 minutes or 20 minutes.
Brief description of the drawings
Preferred embodiments of the invention are described below, by way of example only, and with reference to the accompanying drawings, in which:
Figure 1 shows a prospective view of a first embodiment of a UV exposure meter;
Figure 2 shows a UV exposure meter kit; and
Figure 3 shows a perspective exploded view of a second embodiment of a UV exposure meter.
Detailed description of the drawing
With reference to figure 1 , a UV exposure meter is generally indicated by reference numeral 1.
The UV exposure meter 1 includes a body in the form of a rectangular section of sheet material 3 which has a first major opposing surface, part of which is covered with a UV degradable ink the colour of which changes upon exposure to UV radiation and a colour coded gauge 2 on the rest of the first surface being covered with a UV resistant ink having a colour resembling the colour that the UV degradable ink will be, after it has been exposed to a predetermined amount of UV radiation.
The UV exposure meter 1 is thus a sheet with two separate colour zones. Colour zone 2 is the gauge and the surface thereof contains a substance such a an ink including a UV stabiliser for preventing the colour thereof from changing upon exposure to UV radiation.
Colour zone 3 is a UV exposure indicator and the surface thereof is free of UV stabiliser. It is covered with an ink which does not include UV stabilisers. The colour of zone 3 has a darker intensity than that of zone 2. The colour of zone 3 changes and becomes lighter upon exposure thereof to UV radiation.
In use, the colour intensities of zones 2 and 3 will be selected such that the colour of zone 3 changes to resemble that of zone 2 upon exposure to a predetermined quantum of UV radiation, which is, for example, the maximum quantum of UV radiation to which the human skin can safely be exposed, or relates to the quantum of radiation at which a suntan lotion, normally applied, and of a certain sun protection factor (SPF) will no longer be effective to protect a user.
It is envisaged that the UV exposure meter can be located next to a user to be exposed to the same UV radiation than what the user is exposed to determine the amount of UV radiation to which the user is being exposed to or the time at which a suntan lotion becomes ineffective.
The UV exposure meter can also be graded to resemble the degradation of a corresponding suntan lotion having a certain sun protection factor (SPF). Meters may thus be "SPF5" or "SPF15" or so on.
Figure 2 shows a UV exposure kit 10. The kit includes a bag 11 (packaging) which is UV protected to protect the UV meters 13 from UV radiation when inside the bag 11. The meter bodies are in the form of sheet material discs 13 or stickers are releasably attached to a backing sheet 12. The "stickers" 13 which are removable from the plate 12. The stickers have an adhesive on their rear surfaces for attaching them to an object such as a cooler, bottle, umbrella or any object also exposed to the same amount of sunlight as the user of the discs 13.
The operative front or upper surface of the discs are covered with UV degradable ink i.e. on ink without UV stabilisers.
A gauge 14 in the form of a strip of sheet material includes a number of colour zones 15. The colour zones 15 are formed with UV protected ink so that they do not, at least quickly or easily, changed colour when exposed to UV radiation. Each colour on the gauge represents the colour that the sticker 13 would be after exposure to a certain amount of radiation. These colours are not so much different colours but are rather different intensities of the same colour. Each colour may also represent a point at which a suntan lotion of a certain SPF value would have become ineffective.
The user may thus stick one of the stickers 13 on an object exposed to the same amount of sunlight to which the user is exposed, when applying a suntan lotion of a certain SPF. When the disc 13 has reached the colour on the gauge corresponding to the same SPF, the user will know that the suntan lotion is no longer effective.
Figure 3 shows a second embodiment of a UV exposure meter 20. The meter includes a meter disc 21 covered with a ink 24 having no UV stabilisers (as with the other meters described above). A front removable cover disc 22 covers the ink 24 to protect the ink 24 from UV radiation when the meter is not in use.
A backing disc 23 is also removable from the rear surface of the meter disc 21 to attach the meter disc to an object with the adhesive located on the rear surface of the disc 21.
The backing disc 23 and the backing plate 12 of figure 2, may be wax-covered to facilitate easy removal of the discs (21 and 13) with their adhesive therefrom.

Claims

Claims
1. A UV exposure meter comprising a body at least part of which is covered with a UV degradable substance which changes colour or colour intensity when exposed to UV radiation.
2. A UV exposure meter as claimed in claim 1 in which the body is a section of sheet material having two major opposing surfaces, and the UV degradable substance applied on a least part of a first of two major opposing surfaces.
3. A UV exposure meter as claimed in claim 1 in which the UV degradable substance is an ink having no UV stabilisers added thereto.
4. A UV exposure meter as claimed in any one of the preceding claims in which the section of sheet material is a disc.
5. A UV exposure meter as claimed in claim 4 in which the disc is round in plan view.
6. A UV exposure meter as claimed in claim 4 in which the disc is multi- sided in plan view.
7. A UV exposure meter as claimed in claim 4 in which the disc is square in plan view.
8. A UV exposure meter as claimed in claim 4 in which the disc is round in plan view.
9. A UV exposure meter as claimed in any one of claims 2 to 8 in which an adhesive substance is located on at least part of a second of the two major opposing surfaces.
10. A UV exposure meter as claimed in any one of claims 2 to 8 in which a removable cover sheet is located over the UV degradable substance.
11. A UV exposure meter as claimed in any one of claims 2 to 8 in which a removable backing sheet is located on an adhesive substance on the second major surface of the section of sheet material.
12. A UV exposure meter as claimed in any one of claims 2 to 8 in which part of the first major opposing surface is covered with a UV resistant material.
13. A UV exposure meter as claimed in claim 12 in which the UV resistant material is an ink which includes UV stabilisers.
14. A UV exposure meter as claimed in any one of the preceding claims in which the colour intensity of the UV degradable substance undergoes a human discernible change in less than one hour.
15. A UV exposure meter as claimed in any one of the claims 1 to 14 in which the colour intensity of the UV degradable substance undergoes a human discernible change in less than 50 minutes.
16. A UV exposure meter as claimed in any one of the claims 1 to 14 in which the colour intensity of the UV degradable substance undergoes a human discernible change in less than 40 minutes.
17. A UV exposure meter as claimed in any one of the claims 1 to 14 in which the colour intensity of the UV degradable substance undergoes a human discernible change in less than 30 minutes.
18. A UV exposure meter as claimed in any one of the claims 1 to 14 in which the colour intensity of the UV degradable substance undergoes a human discernible change in less than 20 minutes.
19. A UV exposure kit comprising a body at least part of which is covered with a UV degradable substance which changes colour or colour intensity when exposed to UV radiation, and a gauge section on the body covered with a substance being UV resistant having a colour equal to in intensity, or equal in colour to, the colour of the UV degradable substance after being exposed to a certain amount of UV radiation.
20. A UV exposure kit as claimed in claim 19 in which the body is a section of sheet material.
21. A UV exposure kit as claimed in claim 20 in which the UV degradable substance and the UV resistant substance is located on different parts of a first major opposing surface of two major opposing surfaces of the section of sheet material.
22. A UV exposure kit as claimed in any one of claims 19 to 21 in which the gauge section includes a number of different colour or colour intensity zones.
23. A UV exposure kit as claimed in claim 22 in which the gauge section is a separate strip of material.
24. A UV exposure kit as claimed in claim 22 or 23 in which the different colour intensity zones or different colours correspond to a different predetermined sun protection factor.
25. A UV exposure lit as claimed in claim 20 in which the section of sheet material is a disc.
26. A UV exposure meter as claimed in claim 25 in which the disc is round in plan view.
27. A UV exposure meter as claimed in claim 25 in which the disc is multi- sided in plan view.
28. A UV exposure meter as claimed in claim 25 in which the disc is square in plan view.
29. A UV exposure meter as claimed in claim 25 in which the disc is round in plan view.
30. A UV exposure meter as claimed in any one of claims 20 to 29 in which an adhesive substance is located on at least part of a second of the two major opposing surfaces.
31. A UV exposure kit as claimed in any one of the claims 19 to 30 in which the kit includes a UV impermeable bag.
32. A UV exposure meter as claimed in any one of claims 20 to 31 in which a removable backing sheet is located on an adhesive substance on the second major surface of the section of sheet material.
33. A UV exposure meter as claimed in any one of claims 19 to 32 in which the UV resistant material is an ink which includes UV stabilisers.
34. A UV exposure meter as claimed in any one of claims 19 to 33 in which the colour intensity of the UV degradable substance undergoes a human discernible change in less than one hour.
35. A UV exposure meter as claimed in any one of the claims 19 to 33 in which the colour intensity of the UV degradable substance undergoes a human discernible change in less than 50 minutes.
36. A UV exposure meter as claimed in any one of the claims 19 to 33 in which the colour intensity of the UV degradable substance undergoes a human discernible change in less than 40 minutes.
37. A UV exposure meter as claimed in any one of the claims 19 to 33 in which the colour intensity of the UV degradable substance undergoes a human discernible change in less than 30 minutes.
38. A UV exposure meter as claimed in any one of the claims 19 to 33 in which the colour intensity of the UV degradable substance undergoes a human discernible change in less than 20 minutes.
PCT/IB2004/051072 2003-07-01 2004-06-30 Ultra violet exposure meter WO2005003699A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA200303548 2003-07-01
ZA2003/3548 2003-07-01

Publications (1)

Publication Number Publication Date
WO2005003699A1 true WO2005003699A1 (en) 2005-01-13

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PCT/IB2004/051072 WO2005003699A1 (en) 2003-07-01 2004-06-30 Ultra violet exposure meter

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ZA (1) ZA200503687B (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0487792A1 (en) * 1989-09-11 1992-06-03 Patent Innovations Limited Ultra-violet light detector
US5589398A (en) * 1993-11-15 1996-12-31 Boehringer Mannheim Gmbh Use of test strips to determine the UV intensity or to pre-determine the duration of stay in the sun without sunburn
US6060321A (en) * 1997-07-11 2000-05-09 Hovorka; George B. Sun tan dosimeter
DE29917746U1 (en) * 1999-10-08 2000-08-17 Uv Tec Messtechnik Gmbh Measuring device for ultraviolet radiation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0487792A1 (en) * 1989-09-11 1992-06-03 Patent Innovations Limited Ultra-violet light detector
US5589398A (en) * 1993-11-15 1996-12-31 Boehringer Mannheim Gmbh Use of test strips to determine the UV intensity or to pre-determine the duration of stay in the sun without sunburn
US6060321A (en) * 1997-07-11 2000-05-09 Hovorka; George B. Sun tan dosimeter
DE29917746U1 (en) * 1999-10-08 2000-08-17 Uv Tec Messtechnik Gmbh Measuring device for ultraviolet radiation

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