We developed Multi-Etch in 1993 in order to
use something safer than hydrofluoric acid
to etch titanium. Although still considered
hazardous, Multi-Etch has grown steadily for
the last 15 years as the safer alternative.
Not all uses of hydrofluoric have a safer
alternative but using Multi-Etch to strip
off the naturally-occuring oxide layer on
titanium is a no-brainer. There are still
companies that have been using HF for a long
time and for those companies, we offer the
Rather than completely erasing the color, it
is possible to Multi-Etch the anodized item
and work backwards to the color you wanted.
It takes some practice and skill working
with this technique but it can produce the
colors you're after.
We've been experimenting with Multi-Etch and
have some new data to show for our efforts.
We tested heated as well as room temperature
Multi-Etch on additional grades of titanium
and on NiTiNol and retested many metals we
did in the past.
After cleaning a titanium sheet with
Multi-Etch, users can transfer the image
onto the titanium by ironing the film using
a lot of pressure. When the transfer is
complete, the resulting image turns from
blue to nearly black and is very durable.
If you're a small or large Multi-Etch user,
you know that it is important to stay
consistent with etch times. Here are some
helpful tips and links for checking and
improving the chemistry throughout the
lifetime of the etchant bath.