RE: dusting powders & preservatives

August 3, 2001

,

The preservatives you have listed are all powders and you definitely need a

preservative for this starchy material. Starches are carbohydrates and

microorganisms just feast on them. Imidazolidinyl urea is also known as

Germall 115 from Sutton Labs and Nipa/Clariant have their version of it too.

To incorporate this material into you product you will need to dry blend

them using a Waring Blendor or Osterizer type mixer. Mix the preservatives

with a portion of the drys and blend. You can now use a Mixmaster to mix all

of the remaining drys with this portion with the preservatives.

Young

KY Labs

Innovators of Fine Personal Care Products

dusting powders & preservatives

Hi folks,

I was just looking at a dusting powder formulation which calls for tapioca

starch as the main ingredient. The formulation also calls for the addition

of Methylparaben (0.10%), Propylparaben(0.05%), and Imidazolinidyl

Urea(0.15%).

I've got a sample of Sutton's Liquapar Oil and some Germall Plus liquid.

My question is: does a dusting powder based on mostly starch (the only

liquid addition being fragrance oil) need a preservative?

If it does, would either of the preservatives I've got do? Next question,

what would be the best way to combine the preservatives with the powder?

(using household appliances?)

thanks in advance!

cheers,

.

August 3, 2001

> If it does, would either of the preservatives I've got do? Next

question, what would be the best way to combine the preservatives

with the powder? (using household appliances?)

If the liquapar is the phenonip equivalent as mentioned by you

could use this. Try adding to the fragrance, spraying onto the

powder, then sieving.

Regards

Dave E

>

August 3, 2001

Thanks to both and

I was wondering if I could use my liquid preservatives (germall plus liquid or

liquipar oil) by spraying onto the powder and running it through a Waring

Blendor or Osterizer type mixer.... then wondered if a blendor would mix it

adequately.....

I think I'll talk to Sutton Labs and see what they might recommend.

Next question.... do sodium bicarbonate and kaolin clay fall into the same

catagory as starches when it comes to preserving them in a powder formulation?

thanks again guys! I really do appreciate your experience & advice!