Complex sentence: A popular choice of coloured liquids for lightshows was Flo-Master ink, a product developed for use in permanent marker pens, while this ink was very vivid it also had the problem of staining the operators hands very deeply.
Split into simpler sentences: A popular choice of coloured liquids for lightshows was Flo-Master ink, a product developed for use in permanent marker pens. While this ink was very vivid it also had the problem of staining the operators hands very deeply.