Glatz AG

Lightfastness

Besides the skin, sunshade covers must also be protected from strong UV rays. If a sunshade is frequently exposed to the sun, the material will fade over time. How quickly and to what extent colour intensity is lost depends on the lightfastness of the fabric. The higher the material class, the better the lightfastness and, consequently, the longer the fading period. The lightfastness of GLATZ fabrics is determined according to the ISO 105 802 standard.

Examples of the way in which textiles fade after 160 days
exposure to the sun.

 
Light fastness levels
according to DIN EN ISO 105-B02
Resistance to Fading First noticeable fading after Discoloration
after 160 days of direct sunlight
The GLATZ material classes The GLATZ product range
Level 1 very poor 5 days      
Level 2 poor 10 days      
Level 3 fair 20 days      
Level 4 fairly good 40 days      
Level 5 good 80 days   2 easy Collection
Level 6 very good 160 days   2 easy Collection
Level 7 excellent 350 days   4 and 5 Individual
Level 8 unbeatable 700 days   5 Individual, Professional
  • Take note of the lightfastness when purchasing a sunshade
  • GLATZ recommends lightfastness levels from 7 to 8
  • Protect your sunshade with a GLATZ protective cover when not in use
 
 

Why should lightfastness be a factor in choosing a sunshade?

UV rays can not only cause skin redness but also change the colour of materials. As a result, coloured fabrics fade and white as well as lighter colour shades turn yellow if they are permanently exposed to solar radiation. If you want your sunshade cover to retain its original colour for a very long time, it is advisable to choose a GLATZ sunshade with a lightfastness level of at least 7. 

How is quality affected by the colour, dyeing process and material properties? 

Depending on the intensity and duration of UV radiation, dark materials generally fade faster than light fabrics, while bright and white textiles tend to turn yellow. Textiles woven from pre-dyed yarn fade more slowly than those dyed in one piece after weaving. In terms of lightfastness, fabrics made from polyester and acrylic offer superior quality and differ only in colouring and density. 

Piece-dyed textile

Solution-dyed reel

 

Material class 5

100 % acrylic approx. 300 g/m2, solution dyed, lightfastness 7 – 8, UPF 50+, coated with Scotchgard® or Teflon®. Optimal protection against UV rays.

Material class 4

100 % polyester approx. 250 g/m2, solution dyed staple fibre, lightfastness 7, UPF 50+, water-repellent and dirt-resistant, anti-rot finishing. Optimal protection against UV rays.

Material class 2

100 % polyester approx. 220 g/m2, weatherproof, lightfastness 5-6, UPF 50+, coated with Teflon®. Optimal protection against UV rays.

Material class 1

100% polyester approx. 180 g/m2, weatherproof, lightfastness 3 – 4, UPF 50+, coated with Teflon®. Optimal protection against UV rays

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