Fig. 5
a-values (rising number = redder, falling number = greener) after treatment for 532 nm and 1064 nm nanosecond lasers. A: new and unsoiled, B: new and soiled, C: aged and unsoiled, D: aged and soiled fabric. The dark grey and dark yellow horizontal bars represent the range of values obtained from untreated soiled fabrics, the light grey and yellow ones those for untreated unsoiled fabrics. X-axis labels see Fig. 1. Note divergences can be covered by dots if very small