The aim of the thesis was to obtain a natural dye from red flowers of pelargoniums, which we grew ourselves, and test it for printing and dyeing. Different solvents were used to extract the dye from the geranium flowers, including ethanol, methanol, dichloromethane and water. The extracts of the flowers in different solvents were used to prepare screen printing inks and printed on different types of paper and fabrics. The prints were evaluated colorimetrically and tested for durability. The colour of the extracts, inks and prints was influenced by the solvent used, resulting in purple, burgundy, brown and brownish yellow prints, which were more intense on fabrics than on paper. The prints had on average moderate light fastness, excellent dry rub fastness and poorer wet rub and wash fastness.
In addition to printing, the cotton and wool fabrics were also dyed in aqueous petal extract, where the same bath was used four times, producing brown and yellowish-brown dyeings. The light fastness of the dyes was good after the first dyeing, when the fabrics also showed the greatest depth of colour. The dyes had excellent dry rub fastness, poorer wet rub fastness, good wet iron fastness and medium wash fastness.
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