Not sure about what PH up actually contains, Ive heard people using A-N to grow ganja (I myself would advocate AN) but
It might be a weak base.
Anyway, if your mimosa isn't jet black then it isn't based enough. Not enough base and it'll be grey. If your limo isn't pickng anything up,
heat the whole thing up in a hot water bath and then do the seperating while its hot, or leave it to sit longer, mix more etc.
Chemically speaking, the more thoroughly one mixes, the more you should pick up. (to an extent.)
shoe
ॐ भूर्भुव: स्व: तत्सवितुर्वरेण्यं । भर्गो देवस्य धीमहि, धीयो यो न: प्रचोदयात्
Love, Gratittude, Compassion, Fearlessness!