TS ISO 9175-2

TS ISO 9175-2 addresses the performance aspects of tubular tips used in hand-held technical pens with india ink on tracing paper. It links the tip itself with the properties of the lines it produces and with the test parameters and test conditions used to assess those properties, so the drawing behaviour of the pen can be evaluated in a consistent technical way.

What a tubular tip means in drafting practice

A tubular tip is the fine writing or drawing end that meters ink onto the sheet in a controlled manner. On tracing paper, line continuity, edge sharpness, tendency to spread, and consistency of line width are all important. India ink is a dense, pigment-based ink, so the interaction between ink flow, tip geometry, and paper surface has a direct effect on the final line. Standards in this field therefore look beyond the pen body and focus on the drawing result as well.

How the standard frames performance testing

According to the scope, this standard covers the required performance characteristics, the required properties of lines drawn with the tips, and the test parameters and conditions used to verify them. In general technical terms, that means the standard sets a common basis for how such pens are examined, helping different designs be judged under comparable conditions. It is aimed at functional suitability in technical drawing equipment, where repeatable line quality matters as much as the mechanical form of the tip.

• The scope is limited to tubular tips used on tracing paper.
• It considers the lines produced with india ink.
• It brings together performance requirements and the test conditions used to check them.
• It supports comparable assessment of drawing behaviour in technical pens.