|Ink technical specification:
1. Color of ink
Color is a direct-viewing important
specification of the ink consumers; color
also gives the ink consumers a first
sensible impression. Because of the
different hobbies and customs of the ink
consumers, it is very hard to tell the right
coloration, chromaticity and the depth.
Generally speaking bright color with
moderate depth is acceptable. Different inks
require different specifications of the
2. Intermittence writing
Intermittence writing is the cap-off time of
the ink. Ink must not dry out fast on the
pen tip, but must dry out fast on the paper.
The longer the cap-off time is, the better
the quality is. The cap-off time can be
tested under certain temperature, humidity
and wind power. We consider the
intermittence writing as an important
specification of the ink.
3. Divergency of ink
Divergency is a specification to test the
ink infiltration on the paper, ink with a
good quality has no infiltration on the
4. Stability of ink
Stability is storing ink for a long time
with no precipitation and metamorphic. It is
very important for all kinds of inks. Inks
are fine chemicals reacted and mixed by lots
of chemicals, its stability depends on raw
material reacting in acid and alkali medium.
The good stability can be tested by storing
ink for a long time under certain
temperature with no precipitation and
5. Fastness of ink
Ink fastness is the performance of the ink
dry on the paper for waterproof and
lightproof. Pigment inks have better
performance for waterproof and lightproof.
6. Viscosity of ink
Viscosity is a very important specification
for pigment ink, especially for gel ink.
Viscosity is a key specification for smooth
writing, viscosity must match with different
models of pens, pen tips. Different inks
require different viscosity.
7. Particle size of ink
Particle size is a specification for pigment
ink. Particle size can be examed by
microscope. When the particle size of
pigment pellet is small and even enough, we
consider the stability of ink is good.
8. Surface tension of ink
Surface tension of ink is different from
divergency. We can take effect on divergency
of ink by control the surface tension, and
also can take effect on infiltration of ink.
Surface tension is an important
specification for highlighter ink,
water-based ink and gel ink, it can be
examed by surface tension meter.