Rasendracudamani 3.20

3.20

tayā pracālanaṃ kuryāddhartuṃ sūkṣmataraṃ rajaḥ /
{aṅgāra}
śikhitrāḥ pāvakocchiṣṭā aṅgārāḥ kokilāḥ matāḥ //

with it, one should perform sifting in order to capture extremely fine powder. / The fire-leavings, embers, are regarded as charcoal;