Browsing by Subject "Reaktiivivärit"

The aim of this study was to find out if a microwave oven can be used successfully for dyeing linen. Using a microwave oven makes the dyeing process faster and saves energy. Former research has proved that cotton can be dyed with a microwave oven. It is expected that the results will be the same with linen, because both linen and cotton are mostly cellulose. In the research two different linen yarns were dyed with reactive dyes with four different methods. Three of them were conducted with a microwave oven and one of them was a conventional batch dyeing method. The dyeing time and the power of the microwave oven were varied. Tests were carried out to find out the color, the color fastness to laundering and rubbing, and the strength of the yarn. The different dyeing methods were compared with each other. The research revealed that it is possible to dye linen yarn with good results. The test results didn’t show any major differences between the dyeing methods except in the test of color fastness to laundering. It was revealed that the yarns that had been dyed 30 minutes in the microwave oven stained the adjacent fabric in the laundry more than the yarns that had been dyed with conventional batch dyeing method or 15 minutes in the microwave oven.