Sedimentary, My Dear
Throughout this past summer I have been struggling with the occasional appearance of sediment in my skin tonics. It has been so fine and slight that it wouldn't appear until standing, undisturbed, overnight.
The slightest agitation and it would quickly dissipate – only to reappear again after having time to settle. Seeing a brownish substance on the bottom of a freshly-made tonic really kills the buzz of using the product for me.
Unacceptable! The detective in me was awakened.
It's One of these 30 PossibilitesBecause I am constantly testing different extracts in different combinations (as well as continuing with the tried and true ones), it has taken me most of the summer to pinpoint the culprit. Since all of the hydrosols and extracts were well within date and there was no sign of bacterial activity, it could only be plant residue from one of the 30-odd ingredients I had been working with.
As it turned out, it was not a newbie ingredient creating the disturbance, but one of my trusted staples - Marigold extract (INCI: Calendula Officinalis). My supplier readily replaced the ingredient. Alas, the replacement bottle was from the same batch and the problem showed up again. After a long and informative talk with my supplier, my suspicions were confirmed.