Figure 4: Hue versus total accumulated fluence.

(a) Hue versus total accumulated fluence for (blue circle) ϕ=1.12 J cm⁻² at v=11 mm s⁻¹, (red star) ϕ=1.67 J cm⁻² at v=50 mm s⁻¹, (green downward pointing triangle) ϕ=2.59 J cm⁻² at v=100 mm s⁻¹, (brown left pointing triangle) ϕ=6.26 J cm⁻² at v=250 mm s⁻¹, (pink asterisk) ϕ=13.23 J cm⁻² at v=500 mm s⁻¹, (purple left pointing triangle) ϕ=20.58 J cm⁻² at v=750 mm s⁻¹ and (green right pointing triangle) ϕ=29.75 J cm⁻² at v=1,000 mm s⁻¹. The Hue value completes a full 360° rotation. (b) Polar plot representation of (a) with Hue plotted azimuthally and the logarithm of the total accumulated fluence plotted radially. A full rotation in Hue is observed with increasing total accumulated fluence.