Microanalysis of Organic Pigments in Ancient Textiles by Surface-Enhanced Raman Scattering on Agar Gel Matrices

Table 2

Change in color (CIE system) of the cotton mockup dyed with indigo upon extraction with the Ag-agar gel added with the leuco-reagents.

	Before			After
Point 1: 60′ contact time	36.36	−1.59	−22.51	0.00	0.11	−0.42	0.43
Point 2: 120′ contact time	37.29	−1.77	−22.30	−0.16	−0.03	0.18	0.24