The purpose of the diploma thesis was to research and test applicability of various printing pastes in the preparation of printing inks with dyes extracted from invasive plants for printing on paper and textiles. Eleven screen printing inks with various printing pastes and three natural dyes obtained from the flowers of goldenrod, leaves of Japanese knotweed and flowers of Himalayan balsam were prepared. Printing inks were prepared in two concentrations and printed on cotton and polyester fabric, as well as three papers made from the stem of Japanese knotweed of different grammage and two commercial papers, one made of primary cellulose and the other of secondary cellulose. All prints were colorimetrically evaluated and resistance tested. Prints with goldenrod extract have a yellow tinge, prints with Japanese knotweed extract have a green tinge and prints with Himalayan balsam extract are purple. All prints on paper have good to very good dry rubbing resistance. All prints on fabrics have excellent resistance to dry and wet rubbing as well as to wet-hot ironing. The fastness of the prints on fabrics to washing is somewhat less good, while the printing ink with Himalayan balsam extract shows the least durability. Colour fastness to washing is also affected by the type of printing paste in combination with a certain colourant. The prints have poor fastness to light and fade after being exposed to artificial light. The prints with goldenrod extract have the best light fastness and the prints with Japanese knotweed extract have the poorest, where light fastness also depends on printing paste.
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