The diploma work took place within the Applause project. The project deals with the processing of invasive alien plants based on a zero waste approach. It strives for the proper handling of invasive alien plants that can be harmful to our environment. He urges people to dispose of these plants in the right way.
The purpose of the diploma work was to make a color map for printing with extracts of non-native invasive plants on various selected substrates. The task focuses on two types of invasive plants, namely glandular untouched and Japanese knotweed. In the latter, the thesis deals with its leaves and rhizome.
The theoretical part describes the CIE L * a * b * color space, the Natural Color System (NCS) and the Pantone color pattern. The treated invasive alien plants are presented, and attention is also paid to their removal and processing.
The experimental part contains a description of spectrophotometric measurements of color prints on six different papers. The coordinates of the CIE L * a * b * of the substrates themselves and the prints made with screen printing inks of different concentrations of dyes from invasive alien plants were determined. This was followed by a visual assessment of the samples based on a comparison with the NCS color system and the Pantone color chart, photographing the samples and their representation, and making a color map.
The results showed that it is possible to make a clear color map based on the photos and measurements taken. With the help of CIELAB coordinates, the color can be accurately described, which helps to create a color map. Visual evaluation of color is certainly subjective and depends on several factors, so with the help of NCS and Pantone color charts, color cannot be accurately described, and repeatability cannot be achieved. Due to the larger size of the Pantone color map, it is easier to describe these patterns or to find an approximation to the color. The NCS color chart used contains a very limited set of templates, so large discrepancies occur here.
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