De Atramentis Dark Red Fountain Pen 35ml Bottle Ink Document Ink

This is a permanent and waterproof ink for fountain pens  Technical data: - Lightfast: 8- pH: 7- Surface tension: 60 mN/m- Viscosity: 1,2 mPas- Dampf-proff: Yes- Heat resistant: Yes- Color: Dark Red- Content: 35 ml.