Micro fading test for textile single yarns: a new methodology applied to the Reformation Tapestry to assess its sensitivity to light

Heritage Science

Table 5 Average values of ΔE00, ΔL, Δa, Δb* of sample 26 and BW3 are given with the associated σ

Material	Dyestuff	∆E₀₀, av	∆L*, av	∆a*, av	∆b*, av
Material	Dyestuff	∆E₀₀, av	σ	σ	σ
Sample 26	Woad or Indigo, Weld	0.38	∆L*: − 0.2	∆a^*: 0.3	∆b^*: − 0.5
Sample 26	Woad or Indigo, Weld	0.38	σ: 0.06	σ: 0.02	σ: 0.07
BW3		0.45	∆L*: 0.4	∆a^*: 0.1	∆b^*: 0.5
BW3		0.45	σ: 0.08	σ: 0.08	σ: 0.13