More about tests for weatherproof markers
What’s the difference between a lightfast and weatherproof test?
Lightfastness is tested using a radiation filter equivalent to the level of exposure behind a window. Weather resistance, on the other hand, is tested using a radiation filter for a higher UV-intensity, and includes spraying as well, making it a more rigorous assessment.
Marked surfaces used for weatherproof testing
Markers are tested for weatherproof properties on multiple surfaces that represent where they will be used outdoors, such as stainless steel, acrylic plastic, and glass. The glass test is especially difficult because glass is a closed surface, which prevents the absorption of ink. Only permanent markers or paint markers undergo this type of testing because they are the only markers which can write on all these different surfaces.
How is it determined if a marker is weatherproof?
Accelerated weathering machines allow for weatherproof testing via the use of several pre-programmed norms, with the machine providing all necessary parameters for the test, including:
- Relative humidity
The test of weatherproof markers adheres to the testing guidelines of DIN EN ISO 16474. Reliably complying with these testing guidelines is made easy by using the accelerated weathering machine, since it adjusts its parameters to the relevant settings.
For craftspeople working outdoors or anyone who has to mark a shipping counter or crate outside, for example, it's imperative to know that markings made on metal, wood, or glass, will be highly durable and long-lasting. Such rigorous testing means that edding weatherproof markers and pens can be used with confidence that the mark will last through many types of weather as well as most surfaces.
More interesting topics at edding
Smudge-proof and highly opaque, the edding 950 industry painter is often used by professional divers marking ships underwater. That’s because it is an extra-permanent, durable, and lightfast weatherproof marker that can be used on almost all kinds of surfaces—even if they are rough, soiled, rusty, or wet.
Useable on many surfaces, including plastic, metal, and glass, this versatile edding 750 paint marker is not only permanent, heat-resistant, and weatherproof, but it also comes in 14 different colours. Its highly opaque waterproof ink is visible even on dark and transparent surfaces.