Staghorn sumac (lat. Rhus typhina) is an invasive alien plant that originates from Northern America and is excessively widespread in our country. In the diploma thesis, we investigated the applicability of the obtained dye extract from staghorn sumac fruit, extracted in various solvents, in graphic and textile printing. We focused on printing ink preparation using different concentrations of extracted dye, and the possible positive or negative effects of different additives to the printing ink. For printing, the commercial white paper and papers made from the stems of Japanese knotweed and goldenrod, as well as cotton, polyester and woollen fabrics were used. All prints were colorimetrically evaluated. The colours of the prints varied from apricot yellow or beige to apricot pink or more reddish shades. Grey-green prints were obtained with the addition of copper sulphate in the ink. All prints were tested for rubbing and light fastness properties, and on fabrics, as well as for laundering and wet hot pressing. The fastness of the prints on the light was poor. The addition of tannic acid in the printing ink gave darker prints and improved resistance to light. The rubbing fastness of all prints was excellent. The addition of sodium carbonate in the printing ink reduced the abrasion resistance of the prints on polyester fabric. The durability of the prints on fabrics to the wet ironing was excellent. The washing fastness of the prints on the fabrics was very poor; the prints on fabrics were discoloured, however, there was no transfer of printing ink to the accompanying white fabric. The prints on wool had the worst resistance to washing, while the prints on cationically pre-treated cotton fabric achieved the best washing fastness.
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