Pad Print Machinery
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Pad printing inks must contain a high pigment percentage and a faster solvent
mixture inorder to yeld an excellent and constant print quality. No other printing
system is so versatile as pad printing for the variety of items and surfaces
that can be pad printed. This versatility is the reason why COMEC has produced
a full range of inks capable of meeting any specific need and has payed particular
attention; besides to the technical and qualitative aspects of the product,
also to the final print result which must have precise aesthetical and definition
requirements (tones of color, brightness, sharpeness of the image, etc...).
The choice of a padprinting ink is usually made considering the following factors
in sequence:
- type of material to be printed
- surface characteristics
- brightness degree
- drying requirements
- special requirements concerning mechanical or chemical resistance.
This sequence is not binding since some requirements can determine the choice
of an ink according to the most important technical aspect (e.g.: guarantee
of mechanical resistance instead of brightness). To help the choice of the ink
according to the printing requirement, COMEC has developed a specific range
of mono - and bi-components and corresponding additives. Every type of ink is
composed by a range of basic colours which can be blended with one another (see
the colour table). Colour samples are supplied on request.
The technical service of Pad Print Machinery of Vermont is at your complete
disposal to counsel you on the choice of the ink.
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PLT4
(2) |
PLT4G
(2) |
PLT6
(1&2) |
PLT9
(1&2) |
PLT15
(1&2) |
PLT20
(1&2) |
PLT272
(1) |
PLTF
(1) |
| Celluseacetate (CA) / Celluseacetate
Butyrate (CAB) |
OK |
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| Duroplas (EP/MF/PF/VF/UP/UR)
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OK |
OK |
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| Glass - Ceramic
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OK |
OK |
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| Coated Surfaces
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OK |
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OK |
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OK |
| (Imitation) Leather / Wood
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OK |
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OK |
| Ferrous and non-ferrous
metals |
OK |
OK |
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| Paper |
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OK |
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OK |
| Polyamyde (PA) |
OK |
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OK |
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| Polyacetal (POM)
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OK |
OK |
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OK |
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| Polyethylene* (PE) / Polypropylene
(PP) |
OK |
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OK |
OK |
PP
ONLY |
OK |
OK |
| Polycarbonate (PC)
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OK |
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| Polyester |
OK |
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OK |
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| Polymethyl methacrylate
(PMMA) |
OK |
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OK |
OK |
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| Polystirene (PS)-ABS-SAN
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OK |
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OK |
OK |
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OK |
| Polyurethane (PU)
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OK |
OK |
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| PVC rigid |
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OK |
OK |
OK |
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OK |
| PVC plasticized
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OK |
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OK |
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OK |
| Textiles |
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OK |
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OK |
Preserving the colour
It is advisable to store the ink in a dry, well-ventilated, dark place with
a temperature of between 10° and 25°C (avoiding the direct rays of the sun).
It is important to store the ink well away from sources of heat and also from
acid or alcaline products. Mixed storage is not advisable. Make sure that the
containers are tightly closed. The containers should be in the normal position
(standing up). Once a container of ink has been opened, it is advisable to close
it again, to prevent it drying out, or a crust forming on top. To avoid, or
remedy these problems, carry out the following procedure: cover the ink with
a layer of thinners of the same series as the ink.
Catalyst
The catalysts used in bi-component inks are usually hygroscopic and can lose
effectiveness in a damp atmosphere, if the containers are left wholly or partially
open.
Safety and Hygiene
Follow the producer’s technical specifications (Safety and hygiene cards) regarding
safety measures, risk prevention and hygiene.
Compatibility with Other Products
The recipient where the ink is prepared, as well as all the utensils used during
preparation, must be kept clean and in perfect condition, in order to avoid
contaminating the ink preparation. In order to avoid any possible incompatibility,
which could lead to a mixture of ink or auxiliary products of a different type,
it is advisable to clean the following thoroughly: ink-trays, blades, mixing
containers, spatulas, plates, etc., each time the colour or type of ink is changed.
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Consumables 
