i finally got around to those staining tests on alder today, in preparation for staining my Ibanez S7 clone body.
i'm using the Trans Tint "Red Mahogany" water-soluble analine dye. i'm pretty sure it's made by the same company that makes the Stew Mac Color Tone dyes, and it may even be the same exact color as their Red Mahogany. the alder i have is scraps from my Stew Mac body blank--it's a pale rose color, with brown streaks in the grain that look like tiny slivers of caramel in ice cream. i mixed the stain in three different ratios.
the far left-hand stripe on the left-most scrap is stain mixed 1:64, which is half-strength compared to what the label says (1 oz per quart, or 1:32). the middle stripe on the left-hand scrap is recommended strength, 1:32. the right stripe on the left-hand scrap, and the block next to it, and the two blocks below are all 1:16, which is double strength. and the far right stripe is double strength applied twice--brushed on, wiped off, then again.
it goes on a lot browner than in those pics, then turns reddish as it dries. the half-strength and the full-strength look more pale red that i was aiming for. the double-strength and the double applied twice look pretty good to me, especially where there is enough grain in the wood to show through. i'm going to start my staining with one application of that double strength and see how it looks.