Dmcmtk, both are water and alcohol soluble.
It turns out that the StewMac ColorTone and TransTint products are one in the same, with different labels. Perhaps not coincidentally, my most frequently used TransTint dye is their #6001 Honey Amber, which allegedly is the TransTint label for StewMac’s Vintage Amber. So, it turns out that George and I have been using the very same stain/dye, but with different methods of application. The samples shown online for these two stains/dyes look very different, however, with the StewMac ColorTone Vintage Amber looking much more brown. Seeing it being applied in the video, the dye on George’s gloves and on the pipe cleaner looks just like I’m used to with the TransTint. That having been said, if I had neither of these, I’d be getting the StewMac ColorTone Vintage Amber, just to be certain. The TransTint products are available at Woodcraft.
I’m going to give this a shot with one of my lower-grade estates. That way, if my stain isn’t the same, I won’t be making a mess of something valuable.