The document specifies the requirements and test conditions for water-based coloured draughting inks intended for use in tubular technical pens. The pen and ink combinations are intended primarily to provide for coloured lines and filled areas on natural tracing paper conforming to ISO 9961 and other draughting media.
DIN ISO 9957-3:1998 history
1998DIN ISO 9957-3:1998 Fluid draughting media - Part 3: Water-based coloured draughting inks; requirements and test conditions (ISO 9957-3:1997)