RE: Comprehensive HLB list

[Guest guest]

>* Question 1: I am trying to be as precise as possible with my HLB

>calculations and have carefully gone through all the strings

>concerning HLB as well as done online searches. Since my affiliation

>with this wonderful group I have slowly acquired the required HLB

>values for a portion of the oils in my formula but still have not

>found them for the following:

>Geranium EO

>Lemon grass EO

>Citronella EO

>Cedar EO

>I do have Peppermint EO HLB listed as 12.3. Can I assume the other

>EOs are close enough to this to use 12 as a value for the EOs listed

>above? I am trying to be as accurate as possible since I am having a

>terrible time keeping things in emulsion for more than a day or so.

The HLB System is a tool; it is not the answer. I think it's fair to say that

the required HLB your essential oil blend will range from 9 to 12.

>* Question 2: I am using Olive Oil Peg 7 Esters at a % of the TOTAL

>FORMULA WEIGHT. However, I am using American Lecithin's Alcolec LV-

>30 as a co-emulsifier and in their literature they recommend using

>it at 5%-10% of the WEIGHT OF THE OIL. Has anyone had much

>experience with Lecithin as an emulsifier in a sprayable product?

>Note: My total EO content is now down to about 3% but I am using

>Soybean oil at 3% (HLB=7) for a total oil phase of 6%. I wish to

>make a sprayable formula. Any advice?

If your oil phase contains:

Soybean (Glycine Soja) Oil = 3%

Essential Oil Blend = 3%

and

the required HLB of Soybean (Glycine Soja) Oil is 7

the required HLB of Essential Oil Blend is 9

then the required HLB of your oil phase = 8

if your oil phase contains:

Soybean (Glycine Soja) Oil = 3%

Essential Oil Blend = 3%

and

the required HLB of Soybean (Glycine Soja) Oil is 7

the required HLB of Essential Oil Blend is 12

then the required HLB of your oil phase = 9.5

But from calculations, we also know that

20% Lecithin + 80% PEG-7 Olivate = HLB 9.6

25% Lecithin + 75% PEG-7 Olivate = HLB 9.3

30% Lecithin + 70% PEG-7 Olivate = HLB 8.9

35% Lecithin + 65% PEG-7 Olivate = HLB 8.6

40% Lecithin + 60% PEG-7 Olivate = HLB 8.2

45% Lecithin + 55% PEG-7 Olivate = HLB 7.9

Maurice

PS: Why did you choose Alcolec LV-30? Just curious. I think Alcolec BS would

have been a better choice.

--------------------------------------------------------

Maurice O. Hevey

Convergent Cosmetics, Inc.

http://www.ConvergentCosmetics.com

-------------------------------------------------------

[Guest guest]

PS: Why did you choose Alcolec LV-30? Just curious. I think Alcolec BS

would have been a better choice.

Maurice

Hi Maurice,

I looked up Alcolec BS on the American Lecithin chart and found it has the

same HLB as Alcolec LV-30 (4.0) . Therefore, I don't think I answered your

question stated above. I picked the LV-30 over the Alcolec BS because the

chart describes it as having superior properties for sprays over the Alcolec

BS.

Description of Alcolec BS: Oil Soluble

Description of LV-30: Easily sprayable, low viscosity, oil soluble

Thanks,

Chris