Open HSI menu
Subscribe Login

Home / Articles and Press Releases / Article / Clothing for Conspicuity

CATEGORIES

  • Latest Issue
  • Above The Neck Protection
  • Chemical Protection
  • Confined Space
  • Construction
  • Emergency Procedures
  • Energy, Oil and Mining Industries
  • Eye Protection
  • Fall Protection
  • Gas Detection
  • Hand Protection
  • Hazardous and Explosive Atmospheres
  • Health and Safety Awareness
  • Hearing Protection
  • Heat and Flame
  • Lighting and ATEX
  • Noise Monitoring
  • Personal Protective Equipment
  • Respiratory Protection
  • Safety Footwear
  • Safety Technology
  • Safety Training
  • Slips, Trips and Falls
  • Wellbeing at Work
  • Working at Height
  • Working Rights

MORE

  • Press Releases
  • Events
  • Videos
  • Webinars
  • Magazines

COMPANY

  • About
  • Advertising
  • Newsletter
  • Contact
Open HSI menu
Subscribe

Home / Articles and Press Releases / Article / Clothing for Conspicuity

CATEGORIES

  • Latest Issue
  • Above The Neck Protection
  • Chemical Protection
  • Confined Space
  • Construction
  • Emergency Procedures
  • Energy, Oil and Mining Industries
  • Eye Protection
  • Fall Protection
  • Gas Detection
  • Hand Protection
  • Hazardous and Explosive Atmospheres
  • Health and Safety Awareness
  • Hearing Protection
  • Heat and Flame
  • Lighting and ATEX
  • Noise Monitoring
  • Personal Protective Equipment
  • Respiratory Protection
  • Safety Footwear
  • Safety Technology
  • Safety Training
  • Slips, Trips and Falls
  • Wellbeing at Work
  • Working at Height
  • Working Rights

MORE

  • Press Releases
  • Events
  • Videos
  • Webinars
  • Magazines

COMPANY

  • About
  • Advertising
  • Newsletter
  • Contact

CATEGORIES

  • Article
  • Press Release
  • Above The Neck Protection
  • Chemical Protection
  • Confined Space
  • Construction
  • Emergency Procedures
  • Energy, Oil and Mining Industries
  • Eye Protection
  • Fall Protection
  • Gas Detection
  • Hand Protection
  • Hazardous and Explosive Atmospheres
  • Health and Safety Awareness
  • Hearing Protection
  • Heat and Flame
  • Lighting and ATEX
  • Noise Monitoring
  • Personal Protective Equipment
  • Respiratory Protection
  • Safety Footwear
  • Safety Technology
  • Safety Training
  • Slips, Trips and Falls
  • Wellbeing at Work
  • White Papers
  • Working at Height
  • Working Rights

Article

Clothing for Conspicuity

By Mark Gamble, SATRA

| Read Bio

Published: August 29th, 2018

Share this article

Within the European Union, legislation in the form of the Personal Protective Equipment (PPE) Regulation 2016/425, requires visibility products that are worn or held by a person, which are provided to protect against one or more hazards, to be considered as PPE.

Visibility products are considered to be PPE. Primarily there are three European standards that define and classify visibility clothing, and accessories for wear on the person: EN ISO 20471:2013* – ‘High visibility clothing – test methods and requirements’; EN 1150:1999 – ‘Visibility clothing for nonprofessional use’; EN 13356:2001 – ‘Visibility accessories for nonprofessional use’.

*Appears in the UK as BS EN ISO 20471:2013+A1:2016, but also appears in Germany as DIN EN ISO 20471:2017, a 2017 date is also appended by other national standards bodies.

- hsi -

It will be noted that only EN ISO 20471:2013 refers to high-visibility. The standard defines the requirements for the types of garments that are worn by those working in various capacities on highways; or in ports, airports, or goods yards, where there is inter-action with motorised vehicles. SATRA’s Mark Gamble provides an overview of the safety standard used to assess the suitability of high-visibility clothing.

The current trend with PPE standards is to have consideration of the risk associated with being exposed to certain hazards. The standard EN ISO 20471 has an informative annex (A) that explains low to high risk situations under which a person may need to be seen. The standard is only applicable to those situations which are considered to be high risk. This explains why the standard references the clothing that it defines as high visibility clothing. The standards EN 1150 and EN 13356, which are currently under revision, do not refer to high visibility, and hence have never been intended for use under the same conditions as those defined in EN ISO 20471.

“EN ISO 20471 permits the use of three colours as background material: fluorescent yellow, fluorescent orange-red or fluorescent red – these colours are specified in terms of their chromaticity co-ordinates and luminance”

High visibility clothing

High-visibility clothing must be subjected to an EU type examination process. This type examination process is entered into with an EU Notified Body, an organisation which is authorised to type examine a product and issue an EU type examination certificate. SATRA operates as a Notified Body within the UK and the Republic of Ireland. Without the issue of a type examination certificate by an EU Notified Body it is not permitted to sell high-visibility PPE, or place a conformity mark upon it.

- hsi -

The issue of an EU type examination certificate shows that the approving Notified Body is satisfied that an article of clothing meets the basic health and safety requirements of the Regulation. The route by which it is demonstrated that a garment meets the requirements is to test it in accordance with the requirements setout in an EU harmonised standard, in this instance EN ISO 20471.

A three-class system

The design requirements set out in the standard EN ISO 20471 classify garments according to the minimum amounts of high-visibility materials “EN ISO 20471 permits the use of three colours as background material: fluorescent yellow, fluorescent orange-red or fluorescent red – these colours are specified in terms of their chromaticity co-ordinates and luminance” that can be seen in the finished garment. This three-class system has Class 3 garments providing the highest level of conspicuity.

The standard permits Class 3 to be met by having a single garment or an ensemble – for instance, a classified jacket and a classified pair of trousers. Where an ensemble is specified, this will be deemed to meet the requirements of the standard only when the supplier provides clear instructions on how the classification has been achieved. A Class 3 garment is required to cover the torso and have sleeves with reflective bands or/ and trouser legs with reflective bands.

The standard demands uniformity in the design of high-visibility garments. This is because the conspicuity of a garment wearer is dictated as much by the design of a garment as the distribution and placement of visibility materials within it. The specific design requirements for garments are defined according to the general design of a garment, with types being defined as follows:

  • Garments covering only the torso – for example, vests and tabards
  • Garments covering the torso and arms – such as jackets, shirts, coats and t-shirts
  • Garments covering the legs – for instance, waistband and bib and brace trousers, and shorts
  • Garments covering the torso and legs – including coveralls without sleeves
  • Garments covering the torso, arms and legs – for example, coveralls with sleeves

Jgsvgujp7bfopguacjc2 - hsi -

All high-visibility garments are required to have fluorescent background material incorporated into their construction. Background materials, which provide day-time conspicuity, must meet particular colour definitions that are given in the standard.

“measurement is undertaken on a specialist piece of equipment known as a gonio-photometer system”

Background material

EN ISO 20471 permits the use of three colours: fluorescent yellow, fluorescent orange-red or fluorescent red as background material. These colours are specified in terms of their chromaticity co-ordinates and luminance, which is measured using a defined type of spectrophotometer under specific conditions.

The night-time conspicuity of a high-visibility garment wearer is maintained by having an arrangement of tape materials laid over the top of a background material. The tapes are made from materials which have a specific property of retro-reflection.

Retro-reflective tape

Retro-reflective materials have the property of returning a cone of light back towards the source from which it came. It follows then that for a garment tape to be visible it must have light falling onto it and an observer of the illuminated surface must be within the cone of retroreflected light in order to see its full effect.

This situation occurs when the driver of a vehicle equipped with headlights sees a pedestrian that is illuminated by the light of their car. A driver sitting more or less behind the headlights of the vehicle will also be within a cone of retro-reflection, providing a garment tape produces an effective cone of light. The laboratory measurement of retro-reflective materials is undertaken to define the specific retro-reflection within the cone of light formed by a material. Measurement is undertaken on a specialist piece of equipment known as a gonio-photometer system.

Manufacturing a garment tape that has a retro-reflective surface is usually achieved by one of two means. The most commonly used type is one that uses bead technology.

Microscopic bead technology

Microscopic glass beads of different diameters are distributed over the surface of a substrate layer, which is usually, but not exclusively, a textile material. These beads are stuck to the substrate by a silvered adhesive layer which forms a mirror around the part of the bead that is embedded. The performance of the tape is determined by several factors, including glass bead sizes, their spherical state, or rather lack of it, their distribution over the surface of a substrate layer, and the depth to which they are embedded in the adhesive layer.

Iovcemrky1h0eurqetgh - hsi -

A scanning electron microscope image showing the mixture of glass beads that makes up the surface of a retro-reflective tape

The durability of a tape depends not only upon how well individual beads are held in position on the tape, but also the flexibility of the adhesive layer and the inherent strength of the substrate material. Any loss of beads leads to a reduction in the retro-reflective performance of a tape.factors, including glass bead sizes, their spherical state, or rather lack of it, their distribution over the surface of a substrate layer, and the depth to which they are embedded in the adhesive layer. The durability of a tape depends not only upon how well individual beads are held in position on the tape, but also the flexibility of the adhesive layer and the inherent strength of the substrate material. Any loss of beads leads to a reduction in the retro-reflective performance of a tape.

Micro-prismatic structures

Another type of retro-reflective tape that is used in the construction of high-visibility garments are those based on micro-prismatic structures. This type of material is embossed with many retro-reflectors that are shaped liked the corners of a cube.

As the arrangement of a microprismatic surfaces is made from an engineered surface, micro-prisms can be arranged in different orientations to provide different paths of retroreflection. Each micro-prismatic shape functions by reflecting light from the three sides of its structure. The geometry of these micro-prisms is such that light is reflected back towards its source. The collective effect of the many micro-prisms embossed on a tape provides the required level of retro-reflection.

Ybifsnblpigre1azhkrj - hsi -

The geometrically-shaped embossed surface of a micro-prismatic tape as revealed by a scanning electron microscope

The standard EN ISO 20471 specifies minimum levels of retro-reflective performance for different types of tape that may be used in garment construction. These are tapes made from materials that are defined as retro-reflective separate performance material (tapes intended to exhibit retro-reflective properties only) or combined performance material (tapes that have the properties defined colour properties of background materials and also retro-reflective properties). Therefore, manufacturers should always make sure that the retro-reflective material they intend to use meets their market’s demands.

Wash performance

Products produced to comply with EN ISO 20471 will be used under a variety of conditions, ranging from being worn by a patrolling car park attendant to a person working under very dirty conditions in an activity such as road maintenance. However, used garments will become soiled during their use. This will require them to be laundered or dry cleaned. In order for a highvisibility garment to remain effective it must be capable of withstanding the rigours of cleaning, both in terms of maintaining its integrity, that is without suffering seam breakdown or malfunction, and the performance of its high-visibility components.

Testing of a garment includes laundering of background materials and tapes prior to colour or retro-reflectivity measurement. Measurements are made to determine that a material can maintain minimum levels of performance in wear. In order to demonstrate the compliance of the cleaned product the performance of the background material and the tape are assessed after being laundered to the maximum number of wash cycles intended for a garment.

“high-visibility garments need to be constructed to a set of regulated design requirements that do not compromise the safety of the end user”

Summary

High-visibility garments can be manufactured from different types of materials, warp or weft knitted materials or woven fabrics. These materials must be sufficiently robust to withstand the rigours of their use; therefore, they may be tested for their physical strength, by burst, tensile or tear strength, as appropriate. The design of a garment influences conspicuity, so a garment must meet laid down design criteria. A garment must be classified to one of the three classes that are permitted. This is of particular importance when supplying garments for use in different risk environments.

Ckfnwqjflvck1a1zizr3 - hsi -

It should also be of note that some organisations mandatorily require certain classes of garments to be used in certain situations. As examples, in the UK class 3 garments are specified by the highways agency for use on high speed roads, whilst a certain colouration of garments is required on the rail network.

Garments are also examined to see if they are ergonomically sound. Other tests include colour fastness to ensure the garment fabric is able to withstand the effects of sunlight by exposing it to a Xenon arc lamp. The PPE Regulation demands that materials used in PPE clothing are not harmful to a wearer. Therefore, a certain amount of chemical testing is required of high-visibility materials. Tests are usually conducted to determine whether substances that are prohibited from use are present, or whether substances that are present are there in limited amounts.

Therefore, to ensure that the end-user has the highest level of protection possible, high-visibility garments not only need to be assessed for physical properties, physiological properties, and health and hygiene issues, but also need to be constructed to a set of regulated design requirements that do not compromise the safety of the end user.

Share this article

ABOUT THE AUTHOR

Mark Gamble, SATRA

Readers interested in finding out more about high visibility testing and certification are invited to contact Mark Gamble on [email protected]

Connect with Mark Gamble, SATRA

POPULAR POSTS BY Mark Gamble, SATRA

Istock 899640174 0 74 2222 3948 - hsi -

Article

Clothing for Conspicuity

Get email updates

Sign up for the HSI newsletter

Keep up-to-date through the power of email with Europe's largest audited safety magazine - delivering the latest news and products to satisfy all your occupational safety needs.
  • This field is for validation purposes and should be left unchanged.

FEATURED ARTICLES

Article

 Thameslink Traffic Management Programme

Press Release

‘Working At Height’ Remains Biggest Danger

Press Release

“Uncertainty and Ignorance” Risks More Asbestos Deaths

Advertisement

SOCIAL MEDIA

HSI on Facebook

https://www.facebook.com/HSIMagazine/

Advertisement

SOCIAL MEDIA

HSI on Twitter

hsimagazine HSI Magazine @hsimagazine ·
25 Jan

Global gas sensing leader @ionscience has today formally announced the addition of a high-specification Particulate Matter (PM) sensor to its portfolio.

Read all about this exciting addition!
https://www.hsimagazine.com/press-release/worlds-best-performing-particulate-matter-pm-sensor-now-available-from-ion-science-ltd/

#hsimagazine #ionscience #particulatematter

Reply on Twitter 1618280038557970432 Retweet on Twitter 1618280038557970432 Like on Twitter 1618280038557970432 Twitter 1618280038557970432

Advertisement

SUBSCRIBE

Stay up to date with our newsletter

    • Keep up-to-date with Europe’s largest audited safety magazine

 

    • Delivering the latest news and products to satisfy all your occupational safety needs

 

This field is for validation purposes and should be left unchanged.

Subscribe

SUBSCRIBE TO HSI MAGAZINE

5 reasons to subscribe to our digital and print package

  • Stay up to date from anywhere in the world, with instant access to the latest issue straight from your phone, tablet or laptop.
  • Trust that you’re getting the best content from our range of internationally accredited authors.
  • Get full access to our archives and see how occupational safety has evolved with us over the years.
  • Enjoy our monthly newsletter curated with up-to-the-minute news and a selection of editor’s top picks.
  • Hot off the press and straight to your door – look forward to your own glossy copy of HSI, delivered five times a year
Subscribe View Subscription levels

STAY SAFE & INFORMED

Subscribe to the best health & safety articles, news, products and regulations

Find out more

Stay up to date with our newsletter

  • This field is for validation purposes and should be left unchanged.

ABOUT

  • About HSI International
  • Advertise
  • Contact Us

YOUR ACCOUNT

Sign In Register Account Subscribe to HSI

RESOURCES

Request Media Pack

CONNECT

ACCREDITATIONS

Copyright Bay Publishing 2023. All Rights reserved.

Designed & Built by:
  • Terms & Conditions
  • Privacy Policy
  • Cookie Policy
We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. By clicking “Accept”, you consent to the use of ALL the cookies.
Cookie settingsACCEPT
Manage consent

Privacy Overview

This website uses cookies to improve your experience while you navigate through the website. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. We also use third-party cookies that help us analyze and understand how you use this website. These cookies will be stored in your browser only with your consent. You also have the option to opt-out of these cookies. But opting out of some of these cookies may affect your browsing experience.
Necessary
Always Enabled
Necessary cookies are absolutely essential for the website to function properly. These cookies ensure basic functionalities and security features of the website, anonymously.
CookieDurationDescription
cookielawinfo-checbox-analytics11 monthsThis cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Analytics".
cookielawinfo-checbox-functional11 monthsThe cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional".
cookielawinfo-checbox-others11 monthsThis cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Other.
cookielawinfo-checkbox-necessary11 monthsThis cookie is set by GDPR Cookie Consent plugin. The cookies is used to store the user consent for the cookies in the category "Necessary".
cookielawinfo-checkbox-performance11 monthsThis cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Performance".
viewed_cookie_policy11 monthsThe cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. It does not store any personal data.
Functional
Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features.
Performance
Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors.
Analytics
Analytical cookies are used to understand how visitors interact with the website. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc.
Advertisement
Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. These cookies track visitors across websites and collect information to provide customized ads.
Others
Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet.
SAVE & ACCEPT