Each Gel pen tip has a
ball, and its diameter is expressed in millimeter. So 0.5
and 0.6 mean 0.5mm and 0.6mm diameter of the ball. The smaller
the diameter, the finer the pen writes and the bigger the
diameter the thicker the pen writes.
sometimes ink backflow occurs and soils hands and clothes
It is a very common and important
question to all. In fact, back flow may occur in case of a flawless
pen if it is mishandled by the user in the following ways:
If the user writes
against gravity for a few seconds, air enters through
the tip. It weakens the holding power of ink against
the gravity. So later on, when the pen is kept in the
pocket keeping the tip upside, the ink may flow back
and soil the pocket.
As Oil gel ink has thixotropic
(shear viscosity decreasing) properties, its viscosity
drops with the shocks caused by external impacts. At
ideal environmental conditions, ink can absorb that
shock, but during summer in our country, sometimes the
weather is very hot and that time if the user applies
shock impact unconsciously, the ink may not absorb that
shock and may tend to flow back.
The cap of our pen has a ventilation
hole. When the cap is replaced to the pen after completion
of writing, air inside the cap can escape through the
hole. But if the user blocks the hole with his finger
unconsciously during replacement, the air is entrapped
and applies pressure on the ink to flow back.
flow increases during very hot weather
The ink flow is effected
by the viscosity of ink and viscosity is changed with the
change in temperature. We select ink viscosity for a temperature
range of 25 to 35 degree C, but during summer, when the temperature
rises upper the than 40 degree C, then viscosity changes significantly,
that ultimately increases ink flow that may cause some gooping.
the life of a pen
All Matador Gel pens are
made of NS Tip and high-flow ink having 2 years shelf life.
But the shelf life of a pen depends upon environment temperature
and humidity. For an ideal temperature of 25 degree C and
an ideal humidity of 50%, the life can be exactly 2 years.
But in our country, as the ideal environmental conditions
are not always met, the life drops to 1.5 years.
scratchy feelings are there during writing
Writing smoothness depends
upon both the quality of a pen and that of the paper. A pen
that writes very nice at home on a good quality paper, may
write scratchy in the exam hall where rough papers are delivered.
So sometimes when the paper surface is not smooth, then scratchy
feelings may be there during writing.
winter may the ink of your pen clot and broken writing occur
No, in all of our pens
we use anti-freeze ink which is not frozen even in -15 deg
C temperature. You can check it by keeping our pens in the
refrigerator for a day and try again in the next day. It should
write without any problem.