What if the garment that the blood from a sin-offering sprayed onto was an impure garment? With the phrasing of the question giving away the premise of the sage who asks it. Also, a new mishnah - a list of the animals from which blood would not require laundering if it were absorbed in the kohen's garment. Also, there's a need to have the "right" amount of blood consecrated - a minimum for the sake of the need of laundering - and the question then is how is that known, with the conclusion of Halakhah le-Moshe mi-Sinai. But what proportions are necessary for the water, for the purification process? And how does dipping one's fingers to sprinkle the blood have impact on the need to do so again (more dipping, more sprinkling)? Plus, another mishnah: On the gathering of the blood and the impact of that on the need for laundering.