In addition the same power unit will usually
produce both alternating and direct current.
The electrolyte is a harmless salt solution whose pH factor
is carefully controlled. This pH factor is maintained by
chemically buffering the solution. Although there are more
than one hundred different electrolytes, ten percent of the
electrolytes do ninety-five percent of the jobs. Special
electrolytes for special applications are available.
There are three types of markers. First there is the hand
marker which is usually used
with the stencil laid on the work to be marked. A pad on
the hand marker is moistened
with electrolyte. Second, is the marker cartridge which
may be used with the stencil "caps", which fit
onto the marker cartridge head. The primary difference
between
hand markers and marker cartridges is that a cartridge
has a built-in electrolyte reservoir. Third, there is the
bench
marker, used for marking round parts. The bench marker,
in principle, is an inverted cartridge.
Tooling and fixtures can be made for marking any size or
configuration of metal. Simple hand, semi-automatic, or fully
automatic units are available.
The stencil consists of any thin material in which there
are openings in the form of a design image. |
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