Brown Dye Turns Green...why?

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Forum topic by BinghamtonEd posted 06-29-2012 04:45 PM 730 views 0 times favorited 2 replies Add to Favorites Watch
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2263 posts in 1790 days

06-29-2012 04:45 PM

I have some TransTint dark walnut water-based dye that I’ve been using with good results on several projects. I have noticed that if I get some drips on MDF, plywood, even some rags, sometimes it ends up dark in the middle and green around the edges. Anyone know why it turns green? Obviously it hasn’t been a problem in my work, just something I’ve noticed. I’ve used the dye on cabinet-grade plywood with good results too, it just looks green when you drip it on something, not flood the surface.

-- - The mightiest oak in the forest is just a little nut that held its ground.

2 replies so far

View None999's profile


24 posts in 1606 days

#1 posted 06-29-2012 04:51 PM

My guess is that the green dye component is transported through the fibers more readily than the red dye component, perhaps due to particulate size.

-- None

View Tennessee's profile


2410 posts in 1935 days

#2 posted 06-29-2012 04:53 PM

I’m gonna GUESS that the dye contains a little copper sulfate as one of it’s colors, and when thinned enough, like on a edge, it reacts more with the oxygen in the atmosphere than a thicker coat, and it turns green.
That was quite a SWAG…

-- Paul, Tennessee,

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