945 UV/ MA
Technical Data Sheet
UV screen printing inks
Universal low migration
UV screen printing inks for the
printing of containers, suitable for substrates made of
• pre-treated Polyolefines such as PE/ PP
3.2. Chlor-free pigmented products:
Substrates may differ in their chemical structure or method
of manufacture. A test for suitability must always be carried
out before printing. Antistatic, Mould Release Agents and
Slip Additives may have negative effects on adhesion, and
should be detected and removed prior to printing.
3.3. High opaque products:
• individual ink shades are chlor-free (see top 3.2.)
Euro-Colours / 4-Colour Process Printing Inks:
4-colour process printing / 4 Euro-basic colours are avail-
and therefore may also be used for printing on the outside
Thanks to the good adhesion even when printing at ma-
chine speeds up to 3600 pieces/ hour the ink series 945UV/
MA can be used for al industrial screen printing machines.
They are designed in high gloss, bril iant , good level ing
The inks of the 945 UV/ MA series are constitutional y free
from toxic elements and solvents. The raw materials used
meet with the limits stipulated by the EEC regulation EN 71
(Safety of toys), part 3 (Migration of Certain Elements) of
The inks of the 945 UV/ MA series are ready to use.
If further viscosity reduction is desired, UV thinner may be
added. In order to increase curing, the addition of reactive
RANGE OF COLOURS:
The basic ink mixing system consists of 10 basic colours
In general, no solvent-based thinners should be used due to
and may be used for the mixing of a wide colour shade
range. Field proven mixing formulations exist for Pantone ,
UV Thinner (max. addition: 2-5 %) 945 UV 0014 MA
Reactive Thinner (max. addition: 2-5 %) 945 UV 0010 MA
The above statements are accurate to our best knowledge and belief. However, due to the great number of possible influences during the manufacture of the sub-
strate and the variation in the application process we suggest that suitability testing take place under actual conditions before production. No legal y binding guaran-
tee of certain properties or of the suitability for a definite application purpose can be derived from the above information.
945 UV/ MA
Un-cured prints are considered a hazardous waste.
Therefore, it is recommended to cure misprints under
In the case of particularly high resistance requirements
the UV lamp as a matter of principle. After curing, spoil-
the addition of adhesion modifier is recommended. How-
age can be disposed by conventional methods and may
ever the addition of adhesion modifier to UV curable ink
be incinerated without causing any difficulties.
wil lead to a processing time (potlife) of 4-8 hours at
21°C depending on the colour shade. Higher processing
temperatures wil result in a shorter potlife.
Screens and squeegees as wel as other working mate-
Overprinting must take place within 12 hours at 21°C in
rials can be cleaned with the RUCO screen cleaner 32
335. If cleaning is not performed by ful y automatic
cleaning equipment, protective gloves must be worn.
Adhesion Modifier (max. add.: 2 - 4 %)HV 100 VR 1259
Cleaning liquids that are contaminated with UV products
should not be used for the washing of working materials
that were used with conventional screen printing inks.
Solvents that contain UV residue are not suitable for
reclamation and must be treated as a separate waste.
In some cases of PET substrates the careful y flame pre-
treatment or CORONA-discharge is necessary, surface
Cleaner for cleaning equipment WR 100 VR 1240C
In case of PE and PC, surface tension needs to be at
least 42 mN/m, in case of PP at least 52 mN/m.
A shelf life of 12 months is guaranteed when storing the
A test for suitability must always be carried out before
inks at 21°C and in the original packing container. At
higher storage temperatures the shelf life wil be re-
Stencils / Printing Equipment:
Screen printing meshes between 120-31 threads/cm and
150-31 threads/cm are suitable for printing with 945 UV
UV inks may cause irritations and can increase the sen-
inks. The colour mixing formulations are based on 165-
sitivity of the skin, possibly leading to hypersensitivity.
34 threads/cm mesh. However, test prints and approval
Therefore, the use of disposable gloves and protective
of the colour are general y recommended for the respec-
tive print jobs. Any acrylic acid ester resistant squeegee
For further information on the safety, storage and envi-
ronmental aspects concerning these products, please
refer to the Material Safety Data Sheet (MSDS).
The varying UV absorption of the individual colours re-
sults in a range of curing properties depending on colour
Additional technical information may be obtained from
and opacity. Al colours of the 945 UV series can be
our staff of the Technical Application Department.
cured by the use of medium pressure mercury vapour
The optimum energy output is 150 - 250 Mil ijoule/cm2,
measured with Kühnast UV- Integrator under laboratory
condition. UV curing is fol owed by a 24 hour post-cure
phase after which the ink film is ful y cured and has its
However, it must be noted, that low radiation intensity,
excessive machine speeds or excessive film thickness
can have a negative influence on the curing properties
The above statements are accurate to our best knowledge and belief. However, due to the great number of possible influences during the manufacture of the substrate
and the variation in the application process we suggest that suitability testing take place under actual conditions before production. No legal y binding guarantee of
certain properties or of the suitability for a definite application purpose can be derived from the above information.
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