directions...appreciate it.
Julie
--- In CosmeticLab@yahoogroups.com, "Kevin" <Kevin@...> wrote:
>
> Julie,
> An advantage of working with percentages is that you can make any
size
> batch of product easily by multiplying the batch size by the percent
> of material used. As Bruce explained you are using 4% of a 2%
solution
> if you convert this to the proper decimal notation 0.04 (which is 4
> one hundredths)and 0.02 (which is 2 one hundredths)this
multiplication
> equals 0.08. This is the amount by weight of the dry powder you
would
> use in your product. Conversely, if you wanted to my your own 2%
> solution of Na Hyaluronate, then you would use 2 part of the powder
> per 98 parts of water to give you 2%.
> Now let's put this to practical use. Let's say you want to make 8 oz
> of a 2% solution. You would multiply 8 oz by 2% which is multiplying
> 8*0.02=0.16 oz. Subtracting 0.16 from the original 8 oz you want to
> make then you need 7.84 oz water. Now this shows a difficulty of
> working in pounds and ounces. Let's say that instead of 8 oz you
want
> to make 250 grams of solution. This is approximately 8 oz. Multiply
2%
> times 250 and you find that you need 5.0 grams of your Na
Hyaluronate
> powder in 245.0 grams of water. Certainly you will need a balance
> capable of weighing grams. Now let's say that you wanted to make a
> batch that was 100 grams (slightly less than 4 oz), you would
multiply
> 0.2*100=2 Gee, this looks like 2% is 2 grams per 100 grams of
product.
> Again, remember that the symbol % means per 100. Therefore 2% is 2
> (units) per 100 (units) of something. Hopefully, this provides you
the
> insight to become a redhead like me instead of staying a blonde.
> Kevin Young
> Laboratory Manager
> Beilis Development
> www.beilisdevelopment.com
>
>
> --- In CosmeticLab@yahoogroups.com, "Julie" <kjj@> wrote:
> >
> > Hi Bruce,
> > Thanks for the answer. Now would you mind teaching me the math?
(Yes,
> > I am a blonde!)
> > Julie
> >
> > --- In CosmeticLab@yahoogroups.com, Bruce Heath <baheath@> wrote:
> > >
> > > Hi Julie,
> > >
> > > Ok ..... so you are starting with a 2% (w/w) soln and using 4%
of
> > that.
> > >
> > > You will use 0.08% of the powder (assuming the powder is 100%
> > hyaluronic
> > > acid)
> > >
> > > or 0.8g/lt of acid based on the finished product.
> > >
> > > Regards,
> > >
> > > Bruce
> > >
> > >
> > >
> > > -----Original Message-----
> > > From: CosmeticLab@yahoogroups.com
> > [mailto:CosmeticLab@yahoogroups.com] On
> > > Behalf Of Julie
> > > Sent: Wednesday, 10 December 2008 11:57 PM
> > > To: CosmeticLab@yahoogroups.com
> > > Subject: [CosmeticLab] Help figuring solution %
> > >
> > >
> > >
> > > Hi,
> > > Hope someone can help me figure this out! I've been using a
> > premixed 2%
> > > hyaluronic liquid at 4% in a formula. Now if I were to buy the
> > powder &
> > > want to just add that in to my water phase how do I figure it?
> > Thanks.
> > > Julie
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > [Non-text portions of this message have been removed]
> > >
> >
>
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