The Calli.Brush Pen - with flexible brush tip and fine calligraphy tip! Our 5 starter sets: Available in the classic colors, as a neon edition, in finely graded gray tones or in delicate pastel tones. Sustainable And Safe: Tested high-quality ink with special safety thanks to non-toxic pigments. Thanks to premium water-based ink, it can be washed out of almost all textiles and is therefore also an ideal gift for children who are enthusiastic about painting.