SPECIAL FIELDS
ACRYLAC
Gold and silver inks.
(Page 5)
Ink concentrates
A range of ink concentrates can be supplied to add colour to ACRYLAC gold and silver inks. They can
be used to individually change the shade of the metallic inks.
Yellow ink concentrate 57 0303.
Orange ink concentrate 57 0305.
Red ink concentrate 57 0306.
In the case of special colour demands, exakt matching to the original should be carried out in the
laboratory.
ACRYLAC gold inks containing ink concentrates will not remain suitable over extended
periods of time as they tend to dry out on the surface. Storage over several hours is not
feasible!
Disposal
Disposal is an important consideration when using water-based metallic inks. Wash water disposal
of gold printing ink is subject to special restrictions as it contains copper. For large quantities (>1 ton/
month) it is advisable to install a distillation system. In such a case the varnishing unit must be
cleaned with a special washing agent. We advise to consult our application engineering staff for
further information – phone +49-(0) 89-90 03-327. After distillation of the wash water, the dis-tillate
has the same composition as the original washing agent. This procedure reduces wash water
volume by about 80%, and allows the washing agent to be recycled. The distillation residue (20%
of the original volume) is disposed of together with offset ink residues.
For smaller quantities it is preferable to collect the wash water in a container and allow the
pigment to settle to the bottom for 1 – 2 days. Then the upper liquid can be decanted. This
solution still contains copper and must be disposed of separately in conformity with directions
from local authorities. The sediments of gold ink pigment can be disposed of together with the
offset inks.
ACRYLAC Silver and ACRYLAC Alu-Gold wash water and leftover ink contain no heavy metals,
since the inks are formulated using aluminum pigments. ACRYLAC Alu-Gold also contains
extremely fine color pigment particles. After suitable treatment (precipitation, filtration, neutrali-zation),
wash water can be disposed of by arrangement with local authorities.
These products can, however, generate hydrogen due to slow decomposition of the aluminum
pigments. Ink residues and wash water should therefore never be stored in tightly sealed
containers. Always provide good ventilation.
Printing auxiliaries
We recommend using ACRYLAC Cleaner 10 T 0045 to clean the varnishing unit and especially
the varnishing plate.
