Talens Ecoline Brush Pen
The water-based brush pens by Ecoline are simply amazing. The high-quality soft brush allows you to paint small details, as well as cover bigger spaces, or you can use it for calligraphy. The pens are filled with fast drying aquarelle colour and are available in 59 colours. The colourless blender can be used for smooth transitions between colours. The colours are semi-transparent and are water soluble, so you can continue on your drawings even after the colours have dried. Adapted for both paper and cardboard.