Relative sugar composition of arabic gum paint replicas analysed, in relation to the pigment present, and ageing (the results are the averages of three replicates).

Arabic (A), tragacanth (T), fruit tree (cherry tree) (F, natural ageing (n), artificial ageing in solarbox (sb), weatherometer (w), and thermal (t). natural, at GCI (2 years) – n; natural, at DCCI (2 years) – n; artificial in the oven for 6 weeks – O; artificial in the Weatherometer for 6 weeks – W; artificial in the Solar box for 1 week – SB 1; artificial in the Solar box for 4 weeks – SB 2.