TSO Anodizing is very inconsistent, why?

MMCO

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Apr 18, 2025
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I previously acquired a TSO guide rail square a few years ago.. Most recently, I purchased their parallel guides becuase I could mount the square and I liked their ease of attachment to the guide rail. When I received the parallel guides, I noticed the color disparity immediately. I then installed my guide rail square and it is yet another color, has a teal tinge to it. The picture doesn't accurately reflect the difference in colors as well as the naked eye, but it is pretty obvious the colors are way off. I know some of you will say, "it's a tool, get to work". While I appreciate this, the perfectionist in me is bothered by the significant inconsistency. I contacted TSO and they say there is "some color variation, and they deem this acceptable". Instead of trying to resolve the issue with an exchange they informed they are sending me a return label. I have asked to exchange them for a pair that matches and have been ignored after 2 emails. I buy my tools and expect to have them for a lifetime, meaning I invest in quality. Have others seen such color variation between TSO products? BTW, I have bought more than a dozen Woodpeckers items over the years, and the red is dead on, at least to my eyes. Rant over.....
 

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I have some very different shades of blue on my TPGs. The short ones are very much darker than all my other TSO products. Doesn't affect how they perform though. Did not even try to contact TSO about it. Not worth my time.

I do have some different shades of red on my Woodpeckers stuff too. Not a problem to me either.
 
Something else to consider is that anodizing will fade with exposure to sunlight and even exposure to indoor lighting. Because the rail square has been exposed to more light than the extruded rails, I would expect to see a difference in color. Maybe a minor difference or maybe a major difference it's just a function of the exposure intensity and exposure duration.

Here's an example of 2 Woodpecker rules purchased at the same time but used in different environments. The lower unit was used most of the time for many projects while the upper unit was used less often and stored in a dark basement shop rather than in a brighter garage.
 

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The aluminum alloy used greatly affects the anodizing color results. In this case the rail square is probably fabricated from MIC 6 while the rails are an extrusion grade aluminum. Different alloys react differently to the anodizing dyes.
Okay, so why are two parallel guides made out of the same aluminum so different in color?
 
Something else to consider is that anodizing will fade with exposure to sunlight and even exposure to indoor lighting. Because the rail square has been exposed to more light than the extruded rails, I would expect to see a difference in color. Maybe a minor difference or maybe a major difference it's just a function of the exposure intensity and exposure duration.

Here's an example of 2 Woodpecker rules purchased at the same time but used in different environments. The lower unit was used most of the time for many projects while the upper unit was used less often and stored in a dark basement shop rather than in a brighter garage.
The square was always a teal color from new. The parallel guides are more royal blue. Regardless, there shouldn't be this much variation in a precision tool. As I said, my woodpeckers all look the same after many years. I only work indoors but you would be hard pressed to know which items are older vs newer, based on color alone.
 
If these were cheap Chinese knock offs, this would be acceptable. Not for the premium prices they charge, IMO.
 
The square was always a teal color from new. The parallel guides are more royal blue. Regardless, there shouldn't be this much variation in a precision tool. As I said, my woodpeckers all look the same after many years. I only work indoors but you would be hard pressed to know which items are older vs newer, based on color alone.
Interestingly enough, here's a photo directly from the TSO website.
 

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The 'square' is milled from solid block, the rails are extruded. Might have something to do with the amount / look of additional surface finishing.
 
IIRC, I asked about the differences when I got my 20", 30" and 50" and it was something along the lines of different batches or it may have been there's multiple places where TSO gets their stuff anodized. I don't recall, specifically
 
Yup. Same with powdercoating where I work. We have our own powder coating and multiple external suppliers. And while all supposedly the same RAL code... they are all visibly different.
 
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