I've
listed anodized titanium here under ‘Competition’,
but there really isn’t any except for some artists
who do masterful color anodized images on titanium sheets.
These are not etched, and they are not reproducing photographs.
But they are quite nice, and one of these artists might be
able to render an image of a person with limited detail.
Titanium
is anodized by using electricity with an electrolyte. A broad
range of colors can be obtained. They are natural, stable
oxides of titanium. They will not fade. Some artists have
produced some extraordinary colored titanium pieces.
This
is, however, not a photographic process. I have worked with
titanium for some time in the lab. After refining the
high resolution etching process I thought I might be able
to use a dark oxide color as a contrast for a photo. I cannot
go into the details of the etching process, but suffice it
to say that was not successful.
I
still plan to do some anodizing on some photos in the lab
as an experimental process, but we had to use another coating
to be successful with titanium, which we were.