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pad is certainly the most important and critical element in
pad printing. It takes the ink from the plate and deposits it
on the object to be printed. During this operation it must
guarantee that the characteristics and the quality of the
graphics to be transferred are kept. In order to work in a
perfect manner, the pads must fulfil certain chemical and
physical requirements which guarantee their operation in the
long term. |
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| Characteristics
of TOSH pads |
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For
the production of its pads TOSH has developed a series of
rubbers with characteristics
guaranteeing the following:
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high
mechanical resistance and excellent chemical resistance for longer
pad life;
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correct
surface tension for a perfect ink collection and transfer;
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optimal
deviation of electrostatic charges for a print without defects;
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very
smooth and uniform surface finishing for a clearer print.
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single TOSH pad is produced in 3 rubber types with different
quality, hardness and
resistance characteristics. |
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| WHITE
RUBBER |
| Basic
hardness 14 Shore A. This kind of rubber is recommended when
soft pads have to be used.
These pads are suitable for printing on large
objects which are not very rigid and have highly irregular and convex surfaces.
This rubber has the best chemical resistance. The pads made of this type of
rubber are particularly suitable for machines with a reduced printing strength. |
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| YELLOW
RUBBER |
| Basic
hardness 23 Shore A. This kind of rubber is recommended when a high degree of
clarity is required, like, for example, in the case of halftone or four-colour process printing.
It is useful when a higher quantity of ink is
necessary as it is able to take up a higher amount
of ink from the plate, compared with other rubbers. |
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| RED
RUBBER |
| Basic
hardness 35 Shore A. This rubber guarantees the best relation between printing
quality
and
mechanical resistance.
It is recommended for printing graphics with
particularly thin lines and for particularly precise
printing. It is indispensable in order to guarantee
very long pad life when this is used on highly irregular surfaces. |
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| Rubbers
hardnesses |
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In
order to have the complete range of Shore A hardness, TOSH produces
each rubber in
two different hardnesses
HARDNESS
A(soft type)
HARDNESS
B(hard type)
On
the basis of specific production requirements TOSH produces
rubber with non-standard
hardness:
HARDNESS
S(special type)
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