SV: Re: SV: Re: Re: [sdiy] Matrix FX BBD delay part update

[mrmike]

Actually, after the parts are anodized, they are dyed the desired color 
and then sealed. A good deep black is actually one of the hardest colors 
to get consistently correct.

Home anodizing is relatively easy to do if you have space for working 
with hazardous fumes (the acid used in the anodizing process and the lye 
used to clean/strip metal before anodizing are pretty nasty)

What I'm looking for is a way to use a small cnc system to engrave, the 
fill withpaint, lettering on panels.


mrmike

jhaible at debitel.net wrote:
>> The more common English word is "Anodised".  (But also "Electroplated" 
>> is the same thing.)
>>     
>
> Oh yes, that sounds familiar.
> It's a process of crating a thick oxide on top of the metal
> with electric current, the metal being submerged in an electrolyte.
> (A thin oxide would be created naturally, just from being
> in free air). I don't know how they make the different colours,
> though. (Natural aluminioum oxide is transparent.) Different metals
> in the electrolyte, maybe?
> Anyway, the price difference for natural coloured or various colours
> seems to be minimal in anodised aluminium.
> Ironically, black (or any dark colour) anodised fronpanels turn
> out a lot less expensive, because you don't need any paint in the
> grooves that are machined out for lettering. So you get silver / grayish 
> lettering on black background, without the time consuming process
> of applying paint. Can make a difference of 200 Euros on a huge panel!
>
> JH.
>
>
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