Copied from another post, because i think it can grow to another thread with advice and it was a bit off-topic there ;)
Thanks for the link jsparla, very informative.
I aslo checked out your 'Perfume Formulas, Accords and Recipes' which were terrific.
I see that you refrigerate your blends which I will now try. I do find however that a number of my formulations are cloudy and remain so over time (no added water although my alcohol is only 85%). I have tried DPG and both Polysorbates 80 & 20 as dispersants without out much success. I assume I will have to resort to filtration?
Would appreciate your advice.
I suppose the cloudiness of your compositions comes indeed from H2O in the alcohol, which is only 85%. That gives you about 15% H2O, and thats sufficient to introduce cloudiness in combination with the oils.
I must admit that i've never experienced it myself, always using 95%-98% ethanol.
However, i made some aftershave a while ago (simple, but love the deep warm smell!), based on this ingredients, where the rose-water was definitely introducing a vast amount of H2O, and managed to get it transparent by adding Polysorbate 20 (in short Tween20):
White rose 20
Tolu balsem 25% 30
Givescone 10% 20
Black agar (G) 10
Rule of thumb is to use about the same amount of Tween20 as oils. Mix them together, then add ethanol and finish with adding water compounds.
I remember that Tween80 is the better for use in balms and creams.
Filtration is also considered to be a good practice to get rid of the cloudiness.
But then again, little experience on my side, so i suppose we will get some other neat tricks from our fellow perfumers :)