Natural dyes from research carried out by Leeds University Colour Chemistry department, c.1920s. Catechu dye sample in glass jar. Catechu dye sample 1920 circa
Glass bottle with cork stopper full of Tabloid brand compressed 'Astringent Mixture' tablets (aromatic confection chalk, cardamoms, catechu, opium, cinnamon and ammonium bicarbonate). 74 mm x 20 mm diameter, 16g. Produced by Burroughs Wellcome and Co., London, 1885-1920. Glass bottle of Tabloid Astringent Mixture 1885-1920