Re: Re: Myavert/Biovert ATTN: Nan &/or Jen

[Guest guest]

In a message dated 1/16/04 6:01:20 AM Eastern Standard Time, ThingZ@...

writes:

> In Cosmeticinfo , " Anita " <shulta_grant@y...>

> wrote:

> >Hello

> >

> >I was just doing a search on " microbial test kits "

>

> Hi Again,Anita )

>

> I don't know if you found what you were looking for in microbial

> test kits, but I have a couple of sources that I am happy to share:

> 3M has a wonderful base of microbial testing kits available ... very

> specific kits that are quite easy to use ... you will need a

> different petrifilm for each class of microbe you wish to test for,

> but they are quite accurate and a quality product! They are listed

> under 3M Petrifilm Plate products. You can find out more about

> these by calling 3M Microbiology Customer Service at 1-

> (U.S.) or 1- (Canada).

>

> There is also a very basic testing kit available at a reasonable

> cost through www.SnowdriftFarms.com This tests for bacteria, yeast

> and mold.

>

> These kits don't replace challenge testing, but they do afford you a

> good indication whether or not you're producing a clean product.

>

> Have a GREAT day!!

> Nan

>

Hi All,

Just my two cents worth....consider sending samples out to a lab for

microbial testing. Take a look in our files section for labs that do this sort

of

testing. I have found it much more reliable and more cost effective---and less

trouble---to simply send samples to the lab on a regular basis. Just ask for

an APC for mold/yeast/fungus/bacteria. The APC is different from a challenge

test. It will let you know whether or not your product is " clean " ....it will

not tell you whether or not your preservative system is adequate to withstand

" microbial challenges " over time. These tests can be done for less than $20.

Angie

The Herbarie

Natural Source Ingredients for Toiletries & Cosmetics

http://www.theherbarie.com

[Guest guest]

In a message dated 1/16/04 6:01:20 AM Eastern Standard Time, ThingZ@...

writes:

> In Cosmeticinfo , " Anita " <shulta_grant@y...>

> wrote:

> >Hello

> >

> >I was just doing a search on " microbial test kits "

>

> Hi Again,Anita )

>

> I don't know if you found what you were looking for in microbial

> test kits, but I have a couple of sources that I am happy to share:

> 3M has a wonderful base of microbial testing kits available ... very

> specific kits that are quite easy to use ... you will need a

> different petrifilm for each class of microbe you wish to test for,

> but they are quite accurate and a quality product! They are listed

> under 3M Petrifilm Plate products. You can find out more about

> these by calling 3M Microbiology Customer Service at 1-

> (U.S.) or 1- (Canada).

>

> There is also a very basic testing kit available at a reasonable

> cost through www.SnowdriftFarms.com This tests for bacteria, yeast

> and mold.

>

> These kits don't replace challenge testing, but they do afford you a

> good indication whether or not you're producing a clean product.

>

> Have a GREAT day!!

> Nan

>

Hi All,

Just my two cents worth....consider sending samples out to a lab for

microbial testing. Take a look in our files section for labs that do this sort

of

testing. I have found it much more reliable and more cost effective---and less

trouble---to simply send samples to the lab on a regular basis. Just ask for

an APC for mold/yeast/fungus/bacteria. The APC is different from a challenge

test. It will let you know whether or not your product is " clean " ....it will

not tell you whether or not your preservative system is adequate to withstand

" microbial challenges " over time. These tests can be done for less than $20.

Angie

The Herbarie

Natural Source Ingredients for Toiletries & Cosmetics

http://www.theherbarie.com

[Guest guest]

> Well, after much in-house debate, we've decided to take the plunge

> and go for outside challenge testing using the Biovert preservative

> system.

This is exciting.

Are you using Biovert alone or are you using other preservatives?

Are you using a standardized test like the USP or the CTFA?

Can you provide the ingredient list for the product that will challenge tested?

Maurice

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

Maurice O. Hevey

Convergent Cosmetics, Inc.

http://www.ConvergentCosmetics.com

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

[Guest guest]

>The technical data sheet states that:

> " Dosage - Biovert is supplied as two separate solutions. For maximal

>effect the substrate solution should be dosed at 1% by weight and the

>enzyme solution at 0.05% by weight. Lower doses may be appropriate in

>some products, however, it is important to maintain the 20:1 ratio by

>weight between substrate and enzyme solution. "

>Would someone be so kind as to tell me:

>1. When should this be added to your formulation? (ie: before,

>during, after your mixture is formulated)

I would add Biovert when the formula is cooling down since Biovert

should not be exposed to process temperatures in excess of 40ø C.

>2. How should it be added to the formulation?

>(ie: Do you have to mix both 100g substrate solution and 5g enzyme

>solution together prior to adding it to your formulation OR should

>they be added separately to the formulation?)

I don't think it makes any difference. You could look at these

suggested formulations for guidance.

Biomimetic Body Wash

http://www.archpersonalcare.com/ProductDocumentation/Formulations/biomimetic%20b\

ody%20wash%20-%20bp-6%20hbsl%20quatcoll%20qs30.pdf

Fruit Acid Complex for Chest & Neck

http://www.archpersonalcare.com/ProductDocumentation/Formulations/fruit%20acid%2\

0complex%20for%20chest%20and%20neck%20-%20bt-8%20multifruit%20diadd%20brookswax.\

pdf

Fruit Acid Gel

http://www.archpersonalcare.com/ProductDocumentation/Formulations/fruit%20acid%2\

0gel%20-%20st-11%20multifruit%20plantsol%20yucca%20clintonia.pdf

Fruit Acid Toner for Problem Skin

http://www.archpersonalcare.com/ProductDocumentation/Formulations/fruit%20acid%2\

0toner%20for%20problem%20skin%20-%20tn-5.pdf

Gentle Exfoliating Toner

http://www.archpersonalcare.com/ProductDocumentation/Formulations/gentle%20exfol\

iating%20toner%20-%20tn-7%20willowbark%20betavera.pdf

Smoothing Facial Cleanser

http://www.archpersonalcare.com/ProductDocumentation/Formulations/smoothing%20fa\

cial%20cleanser%20-%20cl-5%20pseudocollagen%20yucca%20willowbark.pdf

>3. When Arch Chemicals say that " Lower doses may be appropriate in

>some products "

>a) What products are they talking about in particular?

Good question. You should contact the vendor.

Arch Personal Care Products

70 Tyler Place

South Plainfield, NJ 07080

Phone: 1.

Fax: 1.

Email: archpc@...

> What would be the recommended doseage for each?

I would stick with the manufacturers suggestion:

For maximal effect the substrate solution should be dosed at

1% by weight and the enzyme solution at 0.05% by weight.

>Please, do, let me know if I have left anything out or if what is

>written above *does not* make sense.

>In the meantime & as always many thanks in advance for your

>assistance!

As far as I can see, compatibility with cationics, temperature, pH and

microorganisms as your biggest concerns.

Quoting from the Biovert brochure

http://www.archpersonalcare.com/Products/Product.asp?ID=139

Compatibility

Fully compatible with anionic, nonionic and amphoteric surfactants,

protein additives and most fragrances. High levels of cationic

surfactants within a formulation can antagonize the system.

Temperature

Biovert should not be exposed to process temperatures in excess of 40ø

C.

In elevated storage trials, typical emulsion based products containing

Biovert are able to withstand BP challenge testing after more than two

months storage below 40ø C, three months at 37ø C, six months at 35ø C

and over two years at 25ø C.

pH Considerations

For optimal performance, a target pH of between 4 and 6 should be

considered, however, the system can perform effectively outside these

limits. To prevent pH drift in formulated products it is recommended

that a buffer system is used in conjunction with Biovert.

Maurice

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

Maurice O. Hevey

Convergent Cosmetics, Inc.

http://www.ConvergentCosmetics.com

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