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Distance factor Z for safety signs

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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Photoluminescent Safety Products Association

Photoluminescent Safety Products Association

JALITE, as a founder member of the Photoluminescent Safety Products Association, can be proud of the achievements over the last 20 years with an ongoing dedication to the promotion and development of photoluminescent products in safety applications. The Association has already made presentations to the  3rd World Photoluminescent Congress held in early 2012 in Portugal.. For more details of the "PSPA" Association please visit the web site at www.pspa.org.uk

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Background to JALITE Group

Background to JALITE Group

JALITE Group has its origins in Switzerland in the late 1970's.The first Trade Mark application for JALITE was the Swiss registration in 1981 with an International Mark filed under the Madrid Convention at the same time. The JALITE name was established throughout the world in the 1980's  and became synonymous for photoluminescent materials and products specifically designed and manufactured for life safety applications. Since these early days, the world has experienced a series of very serious tragedies that have continued to reinforce the need for non-electrical escape route lighting and guidance systems at low location. These systems have to be completely autonomous and independent of traditional electrical emergency lighting systems. Furthermore, these systems are located in close proximity to evacees at floor or low level and are reinforced by the more normal high mounted signs and direction indicating elements used for normal occupancy of the building. JALITE Group has continued to grow progressively from its origins in Switzerland to now offer its product internationally from regional offices on three continents and manufacturing in both Europe and Asia to an ever increasing number of third party distributors serving local market needs and applications.. JALITE PLC in Basildon, Essex, United Kingdom is the Head Quarters of JALITE Group and since its creation in 1983 has been at the forefront of the development of applications in the many and diverse areas of risk reduction using photoluminescence. JALITE Products are sold via a network of Authorised Distributors. The JALITE Authorised Distributors work within specific geographical and application markets.

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Emergency Lighting Exit Signs

Emergency Lighting Exit Signs

The field of emergency lighting has been traditionally dominated by electrically powered signs for quite some time and has ventured into the realm of fire safety despite its prime function of operating in the case of power failure and not specifically of fire. However, it is fairly unknown that there exists a proven, cost effective alternative, that operates under all lighting conditions and especially in cases where normal and emergency lighting are not functioning.  This alternative exists in the form of JALITE photoluminescent technology. This technology works by means of photoluminescent properties retaining any energy from any sources of ambient light. Upon cessation of the ambient light, the photoluminescent product emits the stored energy as highly visible light in the most sensitive region of detection of the human eye. Photoluminescent technology is a more sensible option simply because of its effectivness combined with the energy and maintenance cost savings which potentially exist for a variety of facilities.  For example, JALITE UL924 designed exit signs can meet the international ISO and U.S. NFPA codes as well as the N.Y.C. building codes. Now if it's possible to economically provide emergency lighting Exit and directional signing to an entire high rise building at a significantly lower cost compared to the expenses electrical, emergency lighting would cost, why wouldn't you? Call JALITE INC now

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Photoluminescent Safety Signs

Photoluminescent Safety Signs

JALITE Photoluminescent Safety Signs are safety signs which are produced using phosphorescent material that absorb light energy under normal lighting conditions and will then release this stored energy in the form of light over time. If the lighting is lost or obscured during a power failure or an emergency, JALITE Photoluminescent Safety Signs will remain conspicuous and visible to evacuees and emergency services providing essential safety information and instruction. The brightness of the signs on power loss and length of time over which the safety signs remain visible depends on the amount of light illuminating the sign prior to the emergency and the performance classification of the material chosen. JALITE has led the way in performance standards for photoluminescent safety signs and related safety way guidance products for well over 30 years. The photoluminescent safety signs using JALITE AAA and JALITE SB quality are of course the best in their Class! These products show exceptional brightness and longevity while being quick charging even at low light levels. For more information or a catalogue please browse the website or use the "Search function on JALITE" with words or questions for related material. A direct enquiry e-mail to info@jalite.com will receive our immediate attention.

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Photoluminescent luminance decay

Photoluminescent luminance decay

JALITE products are all systematically tested for photoluminescent luminance decay properties according to the test procedures given in BS ISO 17398 and BS ISO 16069. These methods all relate back to the original milestone German Standard DIN 67510 Part 1. JALITE as founder member of the Photoluminescent Safety Products Association was involved heavily in setting the industry classification system which was formally adopted in the above ISO Standards. With recent developments in Codes and Standards for Photoluminescent Safety Products and in line with the recognized industry development it is now considered necessary to extend the PSPA material classification systems as follows:   Luminance Classes ISO 17398 and PSPA proposals Classification/Luminance mcd/m2 2 mins 10 mins 30 mins 60 mins Class A 108 23 7 3 Class B 210 50 15 7 Class C 690 140 45 20 Class D 1100 260 85 35 Class E 1800 400 120 55 Class F 2300 520 155 70 Class G 3000 650 190 80 The capability now to extend the luminance decay properties to close to 30 times the performance of the old industry base standard is remarkable and opens the door to improved escape route lighting applications and the eventual replacement of electrical escape route lighting. For more technical details and luminance properties under different light sources and illumination conditions please e-mail or contact us.

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Jalite distributors

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