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Pen type |
Ballpoint, 1 mm ball
Suited to write on matt and glossy paper surfaces, as well as on plastic bags
The pen must be capable of writing in a range of climates, from hot and dusty, to humid and cold climates, even after long periods of storage under such conditions |
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Barrel |
Transparent, to allow ink level visibility |
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Ink |
Tropical ink
Flow of ink should be fine, smooth and consistent, without blotches
The ink shall be easy to read against a white surface |
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Colours |
Black, red, green, blue
The colour of the ink should be clear from the appearance of the pen (with the cap attached) |
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Reservoir |
Volume and rate of consumption must be sufficient for a writing length of at least 2 000 meters at 20°C |
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Cap |
Allows easy identification of the ink colour
Must fit on the barrel securely, with no sharp edges
Must have a breathe hole |
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Shelf life |
All pens supplied must be from fresh stock (maximum 4 months from date of manufacture) and must have a lifespan of 3 years |
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Branding |
No commercial branding allowed |