Caran d'Ache Fibralo Fibre Tip Pen 159 Prussian Blue
The Caran d'Ache Fibralo felt tip is a high-quality water-soluble medium fibre-tipped pen, guaranteed against the ink drying out. The colours are bright and transparent. To obtain a watercolour effect using the Fibralo fibre-tipped pens, you don't need a palette; simply use the moistened tip of the pen directly on white paper to create the desired effects.
Water-based ink can be washed out of most modern fabrics.