Enlightening the influence of mordant, dyeing technique and photodegradation on the colour hue of textiles dyed with madder ? A chromatographic and spectrometric approach - Manhita, Ana; Ferreira, Vanda; Vargas, Helena; Ribeiro, Isabel; Candeias, António; Teixeira, Dora; Ferreira, Teresa; Dias, Cristina (2011)