Specifications

29
Revolutionary ‘ECO’ or Cascade Fixing Processing
Technology
The Structurix S ECO and M ECO are
the future of ecologically responsible
processing. These processing
machines are designed to meet the
strictest standards for silver content
in wash water. Thanks to the unique
cascade fixing system, the amount of
silver in the wash water is 15 to 25
times lower than in a conventional
processing system.
Cascade xing
The ‘ECO’ or cascade xing system is an
entirely new concept for processing X-ray
lms. The Structurix S ECO and M ECO
processors are built with two successive
xing tanks replenished on the counter
ow principle.
The result is nothing less than revolutionary
in terms of the amount of silver in the
wash water. The cascade xing principle is
very simple: the exposed lm is rst
developed in the developer tank, then
washed in the intermediate wash tank.
The intermediate washing system ensures
that there is hardly any carry-over of
developer into the xing tanks, thus
keeping the xer bath in optimal condition.
The intermediate washing also prevents
development faults occurring on the lm.
The lm is then 100 percent xed in the
rst xer tank and rinsed in the second
xer tank.
Since xer replenishment is carried out in
the second xer tank, the concentration of
silver in this tank remains very low. There
is also very little carry-over of silver into
the water tank, so that the waste water
complies with the most stringent
standards. Fixer replenishment works on
the counter ow principle, with the rst
xer tank being replenished from the
overow of the second xer tank. An
added advantage of this is that nearly all
of the silver released in the xing stage
ends up in the overow from the rst
xing tank. This ensures optimum silver
recovery.
The “cascade xing” system ensures that
the amount of silver in the wash water
remains within the limit of <50 mg/m
2
.
With the Structurix S ECO and M ECO,
ecology goes hand in hand with economy.
F1 F2
W
3
1 2 3
IWD
D Developer tank
IW Intermediate wash tank
F1 Fixer tank 1
F2 Fixer tank 2
W Final wash tank
1 Overow F1
2 Transfer of residues
3 Link between F1 and F2 in the
direction of F1