GB2307692A - Composition comprising luminescent powder, varnish and, optionally, an ink - Google Patents

Composition comprising luminescent powder, varnish and, optionally, an ink Download PDF

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Publication number
GB2307692A
GB2307692A GB9524375A GB9524375A GB2307692A GB 2307692 A GB2307692 A GB 2307692A GB 9524375 A GB9524375 A GB 9524375A GB 9524375 A GB9524375 A GB 9524375A GB 2307692 A GB2307692 A GB 2307692A
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GB
United Kingdom
Prior art keywords
luminescent
substrate
varnish
mixture
printing process
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
GB9524375A
Other versions
GB9524375D0 (en
Inventor
Shui Leung Chan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
POLYGON IND CO Ltd
Original Assignee
POLYGON IND CO Ltd
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 POLYGON IND CO Ltd filed Critical POLYGON IND CO Ltd
Priority to GB9524375A priority Critical patent/GB2307692A/en
Publication of GB9524375D0 publication Critical patent/GB9524375D0/en
Publication of GB2307692A publication Critical patent/GB2307692A/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K2/00—Non-electric light sources using luminescence; Light sources using electrochemiluminescence
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/22—Luminous paints
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/02—Use of particular materials as binders, particle coatings or suspension media therefor
    • C09K11/025—Use of particular materials as binders, particle coatings or suspension media therefor non-luminescent particle coatings or suspension media

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Engineering & Computer Science (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)

Abstract

A mixture suitable for printing onto a substrate to provide a luminescent coating thereon for use as a luminescent sign, comprises a luminescent powder, a varnish, and, optionally, a coloured ink, which may be printed by a silk-screen printing process to form a coating 4 on the substrate 2.

Description

LUMINESCENT MIXTURE The present invention relates to a luminescent mixture, to a substrate having such a mixture applied thereto and to a method of applying such a mixture to a substrate. The mixture of the invention is used in particular but not exclusively to form a luminescent coating for signs.
It is well known to provide signs which impart information to people which include fluorescent inks in order to make these particularly eye-catching. These signs have a high visibility when there is any available light; however, in darkness such signs are not visible. It is also known to provide articles with luminous or luminescent material allowing these to be seen in total darkness. For example, clocks and watches may include luminous dots on the dial and hands allowing one to tell the time in darkness. These luminous areas are however generally confined to very small dots or bands.
The present invention seeks to provide a mixture which can be applied in large areas in order to provide luminous signs, as well as to substrate provided with such a mixture, and to a method of applying such a mixture.
According to a first aspect of the invention there is provided a mixture suitable for printing onto a substrate to provide a luminescent coating thereon, comprising a luminescent powder, a varnish, and, optionally, a coloured ink.
This mixture can readily be printed onto a substrate using conventional printing techniques, thereby allowing a large substrate area to be covered, in order to provide signs which are visible in the dark. The addition of a coloured ink means that the signs can if required be made highly visible in daylight.
Preferably, the mixture comprises from 5% to 95% by volume of luminescent powder, from 5% to 50% by volume of varnish and from 0 to 45% by volume of coloured ink.
According to a further aspect in the invention there is provided a luminescent sign comprising a substrate having a layer of luminescent material printed thereon comprising a mixture of a luminescent powder, a varnish, and optionally, a coloured ink.
The layer of luminescent material has preferably been applied thereto by a silk-screen printing process. The combination of the luminescent material and printing process is found to give a luminescent material of very high durability. The layer of luminescent material can alternatively be applied thereto by a spray-printing process.
The total thickness of the layer of luminescent material and substrate is preferably in the range O.llmm to lOmm.
The substrate may be selected from a wide variety of material including a metal plate, such as steel, iron, aluminium, brass, plastics such as PVC, polycarbonate or acrylate plastic.
In a further aspect, the present invention provides a method of applying a luminescent material to a substrate, comprising the steps of mixing a luminescent powder, a varnish, and, optionally, a coloured ink and applying these to the substrate by a printing process. The printing process is preferably a silk-screen printing process, or alternatively a spray-printing process. The luminescent powder and varnish are preferably first mixed together, followed by addition of a coloured ink to the mixture. The use of conventional printing techniques means that the material can be readily applied to a wide variety of different substrates in any desired pattern.
An embodiment of the present invention is now described, by way of example only, with reference to the following drawing in which: Figure 1 shows a portion of a luminescent sign in accordance with an embodiment of the invention.
As shown in the figure, the luminescent sign in accordance with the invention comprises a substrate 2 having a layer 4 of luminous material printed thereon. The substrate 2 may comprise a wide variety of material such as a thin sheet of steel, iron, aluminium or brass, or a plastics material such as polyvinyl chloride (PVC), polycarbonate or acrylate plastic. The luminous material 4 comprises mixture of a photo-luminescent powder, a varnish, and preferably, but not essentially, a coloured ink. Overlying the luminescent layer 4 there is provided a protective releasable layer 6 of a thin transparent plastic material such as polyvinyl chloride. This is preferably adhered onto the luminescent layer shortly after its application to the substrate in order to protect this layer, and is removed only once the sign is installed in place.
The luminescent material is formed of a mixture of a luminescent powder, a varnish and a printing ink of bright colour, wherein the light powder is present at from 5% to 95% by volume, printing ink is present at from 45k to 0t by volume and the varnish is present at from 50% to 5% by volume. An example of a suitable luminescent powder is a phosphorescent pigment having a particle size of 21cm, specify gravity of 4.1 comprising zinc sulphide and copper, this giving a yellow-green emission colour. Such a material has a high initial brightness, long afterglow and good light stability. Table 1 shows examples of possible compositions for the mixture, with the relative proportions indicated as percentages by volume.
Table 1
Luminescent Powder Printing Ink Gross Varnish 5 45 50 10 45 45 15 45 40 20 40 40 25 40 35 30 35 35 35 35 30 40 30 30 45 30 25 50 25 25 55 25 20 I 60 20 20 65 20 15 I 70 15 15 75 15 10 80 10 10 I 85 10 5 90 5 5 95 Nil 5 The photo-luminescent material is formed by firstly mixing the luminescent powder and varnish together.Subsequently, the coloured ink is mixed therewith with the resultant mixture printed onto the substrate 2 by a conventional printing process which is preferably a silk-screen printing process, but it can alternatively be a spray-printing process. Depending on the eventual location of the substrate an adhesive material may then be applied to a rear of the substrate to allow this to be readily affixed onto a wall or door or other surface and this is then covered by a conventional waxed release-type paper. A clear protective film is applied to a front surface of the substrate in order to cover the luminescent layer. When the sign is to be affixed to an appropriate surface or object the release paper is removed and the sign simply pressed into place.
Signs formed as described provide particularly effective eye-catching signs, being highly visible in both daylight and darkness, and therefore particularly effective as signs to indicate emergency exits or as signs for advertising purposes.

Claims (13)

1. A mixture suitable for printing onto a substrate to provide a luminescent coating thereon, comprising a luminescent powder, a varnish, and, optionally, a coloured ink.
2. A mixture according to claim 1 comprising from 5% to 95% by volume of luminescent powder.
3. A mixture according to claim 1 or 2 comprising from 0% to 45% by volume of coloured ink.
4. A mixture according to claim 1, 2 or 3 comprising from 5% to 50% by volume of varnish.
5. A luminescent sign comprising a substrate bearing a layer of luminescent material printed thereon comprising a mixture of a luminescent powder, a varnish, and, optionally, a coloured ink.
6. A luminescent sign according to claim 5 wherein the layer of luminescent material has been applied thereto by a silk-screen printing process.
7. A luminescent sign according to claim 5 wherein the layer of luminescent material has been applied thereto by a spray-printing process.
8. A luminescent sign according to any one of claims 5 to 7 wherein the total thickness of the layer of luminescent material and substrate is in the range O.lmm to loom.
9. A luminescent sign according to any one of claims 5 to 8 wherein the substrate is selected from a sheet of steel, iron, aluminium, brass, polyvinyl chloride, polycarbonate or acrylate plastic.
10. A method of applying a luminescent material onto the substrate comprising the steps of mixing a luminescent powder, a varnish and, optionally, a coloured ink, and applying these onto the substrate by a printing process.
11. A method according to claim 10 wherein the printing process is silk-screen printing.
12. A method according to claim 10 wherein the printing process is spray-printing.
13. A luminescent sign substantially as hereinbefore described with the reference to and as illustrated in the accompanying drawing.
13. A method according to claim 11 or 12 wherein the luminescent powder and varnish are first mixed together, followed subsequently by addition of a coloured ink to the mixture.
GB9524375A 1995-11-29 1995-11-29 Composition comprising luminescent powder, varnish and, optionally, an ink Withdrawn GB2307692A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9524375A GB2307692A (en) 1995-11-29 1995-11-29 Composition comprising luminescent powder, varnish and, optionally, an ink

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9524375A GB2307692A (en) 1995-11-29 1995-11-29 Composition comprising luminescent powder, varnish and, optionally, an ink

Publications (2)

Publication Number Publication Date
GB9524375D0 GB9524375D0 (en) 1996-01-31
GB2307692A true GB2307692A (en) 1997-06-04

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
GB9524375A Withdrawn GB2307692A (en) 1995-11-29 1995-11-29 Composition comprising luminescent powder, varnish and, optionally, an ink

Country Status (1)

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GB (1) GB2307692A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015157881A1 (en) * 2014-04-17 2015-10-22 国家电网公司 Luminous powder used for brushing wire

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB431404A (en) * 1933-01-10 1935-07-08 Loewe Opta Gmbh Method of producing fluorescent screens, more particularly for braun tubes
GB493123A (en) * 1935-12-27 1938-09-30 Jean Yves Mesnet De La Cour Improvements relating to paints
GB553769A (en) * 1941-12-03 1943-06-04 Lewis Berger & Sons Ltd Improvements in or relating to the manufacture of paints, varnishes and the like possessing fluorescent properties
US2707687A (en) * 1951-08-30 1955-05-03 Westinghouse Electric Corp Method of forming luminescent coating
GB803057A (en) * 1955-12-22 1958-10-15 Switzer Brothers Inc Dyed resinous pigments
US2940937A (en) * 1954-04-29 1960-06-14 American Cyanamid Co Fluorescent printing ink
GB1016534A (en) * 1962-08-29 1966-01-12 Ind Colours Ltd Improvements in pigment materials and in processes for their production
GB1270103A (en) * 1968-04-02 1972-04-12 Post Office Improvements in and relating to printing apparatus and methods
GB1345176A (en) * 1970-04-14 1974-01-30 Hoechst Ag Fluorescent pigments and process for their preparation
JPS6284169A (en) * 1985-10-09 1987-04-17 Sugimoto Shigeru Paint having fluorescent and phosphorescent property
EP0253543A1 (en) * 1986-07-10 1988-01-20 THOMAS DE LA RUE & COMPANY LIMITED Printing ink
US5290348A (en) * 1992-10-05 1994-03-01 Pitney Bowes Inc. Non aqueous fluorescent dispersion ink with improved shelf life, tack and flow
US5472737A (en) * 1994-06-09 1995-12-05 Anders; Irving Phosphorescent highway paint composition

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB431404A (en) * 1933-01-10 1935-07-08 Loewe Opta Gmbh Method of producing fluorescent screens, more particularly for braun tubes
GB493123A (en) * 1935-12-27 1938-09-30 Jean Yves Mesnet De La Cour Improvements relating to paints
GB553769A (en) * 1941-12-03 1943-06-04 Lewis Berger & Sons Ltd Improvements in or relating to the manufacture of paints, varnishes and the like possessing fluorescent properties
US2707687A (en) * 1951-08-30 1955-05-03 Westinghouse Electric Corp Method of forming luminescent coating
US2940937A (en) * 1954-04-29 1960-06-14 American Cyanamid Co Fluorescent printing ink
GB803057A (en) * 1955-12-22 1958-10-15 Switzer Brothers Inc Dyed resinous pigments
GB1016534A (en) * 1962-08-29 1966-01-12 Ind Colours Ltd Improvements in pigment materials and in processes for their production
GB1270103A (en) * 1968-04-02 1972-04-12 Post Office Improvements in and relating to printing apparatus and methods
GB1345176A (en) * 1970-04-14 1974-01-30 Hoechst Ag Fluorescent pigments and process for their preparation
JPS6284169A (en) * 1985-10-09 1987-04-17 Sugimoto Shigeru Paint having fluorescent and phosphorescent property
EP0253543A1 (en) * 1986-07-10 1988-01-20 THOMAS DE LA RUE & COMPANY LIMITED Printing ink
US5290348A (en) * 1992-10-05 1994-03-01 Pitney Bowes Inc. Non aqueous fluorescent dispersion ink with improved shelf life, tack and flow
US5472737A (en) * 1994-06-09 1995-12-05 Anders; Irving Phosphorescent highway paint composition

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Derwent WPI Abstract Accession No.87-146906/21 & JP620084169A *
Kirk-Othmer,Encycopedia of Chemical Technology (3rd Edition) 1981(John Wiley & Sons),561-568 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015157881A1 (en) * 2014-04-17 2015-10-22 国家电网公司 Luminous powder used for brushing wire

Also Published As

Publication number Publication date
GB9524375D0 (en) 1996-01-31

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