Durability Scientists have evaluated the susceptibility to sunlight of ten paints of differing compositions as typically used by urban artists, by exposing them, applied to concrete and brick, to artificial sunlight ageing test in laboratory conditions. The durability of the paints on these substrates depends mainly on the paint composition (base, pigment and filler) but also on the type of substrate, as this influences paint adhesion capacity. The greatest colour modification was detected in fluorescent paints. Alonso-Villar, E.M. et al., Progress in Organic Coatings, 2021, Vol. 154. Bio-based Paper and paperboard used ...