Overview on natural dyes and their IR-spectra - Part VI: Algae based pigments

Algae are water based species with different colorations as green or red. Color pigments and dye extracts gained from algae are offered as natural based plant dyes. Algae based materials are usually rarely considered for dyeing of textiles in comparison to synthetic or conventional plant based dyes. Nevertheless, algae are a sustainable and natural source of bio-based substances and an increasing use might be a promising development in future. The current paper is the last one of a series of papers reporting on natural dyes and materials with special view on their infrared spectra. This last overview paper is dedicated to available special types of algae based natural pigments and related other algae and lichen based products which can be useful for coloration processes. Besides, general information on dye origin and possible application, especially infrared spectra of dye and reference materials are supported. The IR spectra are discussed in respect to sample composition and chemical structure. By this, the actual paper can be useful for persons searching for alternative coloration materials or working in the field of material analytics and spectroscopy.