151 025 ISOGRAPH 0,25mm
Year: 1990

151025 rotring isograph technical pen 0.25mm

rotring International Pen Line (IPL)

Line thicknesses for drawing in accordance with ISO 128 (series 1) and DIN 15 (series 2)
and for lettering in accordance with ISO 3098/1 and DIN 1451.
Technical pens and lettering stencils coordinated in a ratio 1:10.
Drawing tube in 3 and 5mm dia metal bush.

The isograph has refillable ink reservoir. (making it more practical then rapidograph)
Its patented push-on sleeve makes for easy access to the ink helix for fast cleaning.

Available sizes:
151 010 0.10 mm reddish brown
151 013 0.13 mm violet mISO
151 018 0.18 mm red mISO
151 020 0.20 mm saffron yellow
151 025 0.25 mm white mISO
151 030 0.30 mm grey-green
151 035 0.35 mm yellow mISO
151 040 0.40 mm caramel
151 050 0.50 mm brown mISO
151 060 0.60 mm light blue
151 070 0.70 mm blue mISO
151 080 0.80 mm light green
151 100 1.00 mm orange mISO
151 140 1.40 mm green mISO
151 200 2.00 mm light grey mISO

In production since 1976., this particular item is from the 1987. forward.
Isograph before 1987 had (for example) '0,10' written on the nib, and later had just ',10'.

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