Re: Surface area Titanium/coloring

Peter W.. Rowe, wrote:

> On Sat, 10 Sep 2005 10:59:46 -0700, in =CC=07=F5 twocranks1@xxxxxxxxx w=
rote:
>=20
>=20
>>>Here is an interesting link to a study made to find the best grit of
>>>paper to use on differant materials to increase the surface area.
>>>http://www.struers.com/resources/elements/12/20117/e-Structure%201_EN.=
pdf
>>>
>>>The results for titanium showed optimum depth of scratch and number of
>>>scratches is achievied with P180 grit paper.
>>>
>>>It was if interest to me becasue when coloring Titanium by
>>>electroplating, I imagine the greater the surface area - the more
>>>vibrant the color.
>>>Anyway - I thought it was an intesting - I'd be interested if anybody
>>>had any thoughts or experiance with this - I'm allways trying to make
>>>my Ti Jewelry colors more eyecatching.
>>>
>=20
>=20
> Personally, I always sort of preferred the non-directional frosted fini=
sh
> achieved with sand blasting type methods. I don't know if the actual s=
urface
> area produced this way is greater than that produced with an abrasive p=
aper, but
> suspect it may be.
>=20
> Peter
You can get a sorta 'faux' chatoyant effect sometimes with straight or=20
curved sanding. using an end-oriented stainless brush in a drill press=20
with overlapping you can get a 'faux' engine turned effect that's fun. I=20
think the use of 'multi-etch' even on a fairly fine finish does more for=20
color brilliance than texture alone - but texture also gives a little=20
scratch protection to the color. I've had more than one other artist=20
mistake some of my pieces for niobium.

Carl


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