barvy --- fluorescence --- textilní chemie

High-visibility clothing, is a type of personal protective equipment (PPE), is any clothing worn that has highly reflective properties or a color that is easily discernible from any background. Yellow waistcoats worn by emergency services are a common example.Part of the surface of the garment may have retro reflective stripes. This way they become much more visible in the dark for observers near a light source, such as the driver of a car with its headlights on. The pattern of the retro reflecting parts also helps to distinguish between objects and people. Area reflective fabric has proven to be the most effective way of outlining the body, so that drivers can distinguish a human shape at night. For greater visibility during the daytime, very bright colors are used for the main body of the garment by means of fluorescent material. In general, people who wear high-visibility clothing are those who need to be seen during poor lighting or weather conditions, or when working in environments where there is a lot of moving machinery.Types of high-visibility clothing:There are three different classifications for high-visibility clothing:1. Class D - Outdoor daytime use only, with fluorescent or other non-retro reflective high-visibility material2. Class N - Night-time use only, with retro reflective material on a ?non-specified? background3. Class D/N - Day or night use, with a combination of fluorescent and retro reflective material.Retro reflective material reflects light back. Non-retro reflective material does not. If retro reflectiveBefore purchasing a garment, a risk assessment should be conducted to determine when and where the clothing will be worn, and what work tasks are to be completed.Environmental factors that may influence your choice of clothing include: "Temperature" Lighting and visibility (including during the day or night and different types of weather).Primary concerned regarding these garments has been the fading due to the external environmental factors as well as constant washing. This report will simply focus on fading due to washing.

Warning clothing - study of fluorescenece fading in washing