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ISO 17398 Performance of safety signs

This Standard now gives the basis for quality attributes for photoluminescent materials and safety signs. JALITE has been a leading contributor to both National and International Standards with the objective of helping authorities specify products for the safety needs. Needless to say JALITE manufactures the full range of materials from Classifications A to D and has its unique grades of JALITE AAA and JLUME both simply brilliant in their category. It is now accepted that to meet the vast majority of codes and standards for photoluminescent safety products and applications that products have a minimum performance classification of Class C according to ISO 17398. JALITE AAA and JALITE SB products largely exceed this requirement with added benefits of high brightness and quick charge. ISO 17398:2004 specifies requirements for a performance-related classification system for safety signs according to expected service environment, principal materials, photometric properties, means of illumination, fixing methods and surface. Performance criteria and test methods are specified in ISO 17398:2004 so that properties related to durability and expected service life can be characterized and specified at the time of the product's delivery to the purchaser. ISO 17398:2004 does not cover electrical power supplies, their components or electrically powered elements. It also does not cover properties of illuminating components, but the photometric properties for the particular types of safety signs are covered.

Distance factor Z for safety signs

Many factors will influence the distance factor Z of a safety sign which is expressed as the ratio of the observation distance D and the size of the symbol or text d as follows : Z = D/d   the Z factor ( distance factor Z) is not the same for all graphical symbols the Z factor is influenced by the luminance of the sign (brightness appearance) the Z factor is influence by the luminance contrast between the symbol elements or text and the background the Z factor is influenced by the visual acuity of the audience the Z factor is influenced by the level of familiarity that the audience has with the symbol or text The revision of ISO 3864-1 should provide good guidance for the Exit sign of ISO 7010. UL924 legibility testing for Exit signs provides excellent data for the Z factor of photoluminescent signs of this quality illuminated with only 50 lux of ambient lighting after 90 minutes in complete darkness, It must be remembered that Z factor is always determined when the sign is observed "head on". For a sign to be legible and recognizeable it must of course be detected in the field of view within peripheral vision. Sign size is of course essential to making a sign conspicuous as is luminance and luminous contrast with the surroundings. However, it is essential the sign be mounted in a position facing the observer so that it can be clearly detected. The sign should also be positioned in the correct context to function effectively. Useful guidance is obtainable from JALITE and JALITE Authorised distributors which distinguishes professionals from printers.

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ISO EN 7010 New Amendment 4

A new amendment to ISO EN 7010 has been published which formalises the addition of shipboard safety signs to the workplace and public place safety sign arena. 48 safety signs are now standardized in ISO EN 7010 and fully meet the design requirements of ISO 3864 Standards. These safety signs are an integral part of the Shipboard Safety Sign Standard ISO 24409-2 to be published shortly.

What is photoluminescence?

There are two types of photoluminescence and these are fluorescence and phosphorescence. Fluorescent materials absorb light and then emit light instantaneously at a different wavelength. Phosphorescent materials absorb light of short wavelength and then emit light slowly over time also at a different, longer wavelength. It is often the case that the two photoluminescent phenomena can occur at the same time and indeed JALITE produce special high visibility products that are highly conspicuous in both the "daylight" and dark condition to improve visibility of escape paths.These are shown in the picture above this article. Typical safety grade phosphorescent materials absorb in the UV, Blue light visible region (300 - 450nm) of the spectrum and emit in the yellow green (500- 600nm). JALITE materials are covered by the technically correct term phosphorescent. The energy needed to activate it is supplied by common light sources such as daylight, ordinary tungsten filament and the most effective fluorescent lights with a high colour temperature. Under sudden power loss situations, the material immediately appears very bright and is conspicuous at a distance, providing an effective, bright contrast for text and graphical symbols and ensuring that safety messages are quickly recognised. This assists people to orientate themselves so that they can react effectively and evacuate efficiently. JALITE materials are designed specifically to maximize both high initial brightness and persistence which is often expressed as long after glow.. Furthermore, as for the flagship products JALITE AAA and JALITE SB they can be charged easily at low illumination and with short exposure times to light energy.

Fire Safety Management

Fire Safety Management has 5 key focus areas with a sixth added "Contingency". 1. Prevention 2. Escape 3. Communication 4. Confinement 5. Suppression 6. Contingency JALITE Photoluminescent Fire Safety signs and safety way-guidance systems support and reinforce each of these strategy focus areas and is a key element of the specific communication strategy. The contingency around the total failure of any obligatory, regulation electrical emergency lighting has always created demand for photoluminescent way guidance systems as well as the need for low location assistance to egress. A formal safety sign and escape route survey is an essential part of any fire safety policy as well as featuring as an integral part of fire risk assessment.

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JALITE Authorised Distributors share the JALITE philosophy of providing best practice advice and guidance in the selection of product and in supply, installation, service and maintenance.

JALITE products are found from professionals in the fields of property management and maintenance, fire protection and fire prevention service companies, safety product supply companies and other specialist sign companies.

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Jalite is active in over 109 countries

In the 35 year history of JALITE, products have been developed and supplied to over 100 countries in the world and often with safety messages in the local language or with dual language, with the International Safety language English. It has been a JALITE tradition to fully comply with National and International Standards for the design of our products. Now, with JALITE presence on three continents and Authorised Distribtors world wide we can be considered local throughout the world. Interested to Distribute JALITE products in your area of safety or your district and country? Just send us a mail and contact us now with an introduction.

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  • Lloyd's Register
  • BSI Group
  • International Maritime Organization
  • International Organization for Standardization
  • Photoluminescent Safety Products Association