I needed to extend a board, so I cut it at an angle and made a scarf joint. When I glued it together and clamped it together, I saw that some of the glue that had squeezed out had bright blue streaks in it! Has anyone seen this happen before, or know why it happened?
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On the other side, I don't see any of the blue coloration in the squeezed-out glue.
The board is cedar, and the glue is Titebond III. When I put the glue on, I used a credit card to spread it, and it looked normal. I didn't notice anything strange about it. For the cut, I used a track saw, then cleaned up the surface a bit with hand planes. Again, it seemed completely normal.