The albedo [whitening] is, so to speak, the daybreak, but not till the rubedo is it sunrise. The transition to the rubedo is formed by the citrinitas [yellowing], though this, as we have said, was omitted later.
Hillman, quoting Jung, identifies albedo as a liminal ‘daybreak’ state and frames the disappearance of citrinitas as the central structural problem in understanding the transition from whitening to reddening.
, Alchemical Psychology, 2010thesis