How long will the image last on KernowPrint Dry Toner when used outside?
The longevity of the image depends on the concentration of UV in the light it is exposed to. Direct sun is worst case and from what we have seen the image will begin to fade within 6 months of direct exposure. We do not know if the fade curve is linear relative to UV concentration or how long the image will last in total darkness. The key however is protecting the image from UV whether it is through using UV-screening over-varnish or glass containing a UV barrier. Toners also vary in printing hardware, with a variation between different makes and models possible.