I had 30g of shredded brazilwood and a few spare balls of white merino. Here's what happened to them:
Boiled up the brazilwood for 15 minutes, left to stand overnight, strained off the liquid into the dyepot, added more water and boiled up again, strained off and added to the dyepot. Added 10g alum (pre-dissolved in a little hot water), simmered two 50g skeins of merino in the dyebath for an hour. Result: salmon pink.
What was left in the dyepot was pretty pale, so I boiled up the brazilwood chips in about half a litre of water five more times to produce a new dyebath and added alum and yarn as before. Result: apricot.
And here are the two shades together: