Re: juice in lotion/germall plus/other preservatives

[Guest guest]

>

>After reading the results from the cucumber lotion preseved with

>germall plus, I was wondering:

>

>- will other preservatives work to preserve a juice in a lotion?

Do we KNOW that the Germall Plus preserved the cucumber lotion

effectively? Certainly, Germaben II, Germaben II-E, and Phenonip

should be evaluated. Tetrasodium EDTA or Disodium EDTA will give your

preservative system a little extra punch. I would also try something

like .3% Germall II, .2% Methylparaben and .1% Propylparaben.

There is no magic preservative system that work great in all personal

care products. If you don't have your products tested, it's almost

impossible to say if your preservative system is working. Germall

Plus, Germaben II and Phenonip are easilly acessable to most

homecrafters and these preservative systems should provide the user

with some level of comfort. But you really don't know if your

preservative system is effective unless you have it tested.

>- which preservatives are suitable for this type of work and which

>are not?

see above

>- Approx. what percentage would each preservativve need to be used at

>to work effectively?

>>1) What the best preservatives for this purpose would be?

>

>When you say " skin care products " , I will assume you mean creams and

>lotions. For your purposes, I think you should consider:

>

>Germaben II at 1%. You can find more information about Germaben II by

>looking in the CosmeticInfo files area and by going to the

>manufacturer's website:

>http://www.ispcorp.com/products/hairskin/preserve/pres1.html

>

>Germall Plus at .1% to .2%. You get find information about Germall Plus

>at:

>http://www.ispcorp.com/products/hairskin/haircare/per12.html

>

>Liquid Germall Plus at .35% to .5%. I'm not aware of any online

>resource specifically about Liquid Germall Plus, however the

>information about Germall Plus would apply here, with the exception of

>concentrations. Liquid Germall Plus is a 40% solution of Germall Plus

>in Propylene Glycol.

>

>Phenonip at .5% to 1%. You can find information about Phenonip online

>also.

>

>The 6 page brochure can be downloaded from:

>http://www.nipa.com/graphics/leaflets/nipa3.zip

>

>The individual pages can be viewed from your browser at:

>http://www.nipa.com/products/nip3a.htm

>http://www.nipa.com/products/nip3b.htm

>http://www.nipa.com/products/nip3c.htm

>http://www.nipa.com/products/nip3d.htm

>http://www.nipa.com/products/nip3e.htm

>http://www.nipa.com/products/nip3f.htm

>

>All of the percentages are percentages by weight. Therefore you will

>require a balance to measure the persevatives accurately. Germaben II,

>Liquid Germall Plus and Phenonip are easy to handle since they are

>liquids and are easier to weigh out accurately since they are used

>higher concentrations compared to Germall Plus.

> " ...Liquid Germall Plus is a patented combination of olidinyl Urea

>(Germall II), Iodopropynyl Butylcarbamate (IPBC) and Propylene Glycol.

>Product composition is 39.60% Germall II, 0.40% IPBC, 60.00% Propylene

>Glycol. The recommended use level range for Liquid Germall Plus is 0.1 -

>0.5%. A level of 0.5% may be required for products containing proteins

>and/or other complex ingredients.

>- Is germaben II suitable for this type of product?

see above

>Getting interested in all this!

Good!! This is important for anyone who cares about the health and

well-being of themslves, family and customers, as well as the econmic

health of their company.

When you look at the actual cost of a preservative system and the

protection that it affords, you realize that this is a small investment

for the protection that you get.

And remember, too much of a good thing, can be a bad thing. Here's

something that I posted to this list back in July and should concern

everyone that doesn't have access to an accurate balance.

> .....My

>professional choice of preservative(s) in my formulas is affected only

>by effectiveness and cost effectiveness of the preservative system.

>But I suspect that many HomeCrafter and some small manufactures of

>personal care products have another consideration; the accuracy and

>precision of their balance or scale.

>

>Let's imagine that you are thinking of using Germall Plus, one of my

>favorites. As we know from the ISP literature, the maximum normal use

>level for Germall Plus is 0.2% but Germall Plus is approved for use in

>EU up to 0.5%.

>

>Now, let's say we decided to evaluate Germall Plus using 0.3% in our

>new magic lotion. I should note that I've never used Germall Plus at

>0.3% nor do I recommend using Germaben Plus at 0.3%.

>

>What would be a good size batch to make to test Germall Plus? Before

>we can make that decision, we must know what is the lowest amount that

>we can _accurately_ weigh on our balance or scale.

>

>What follows are a series of calculations (thanks to Excel) that show

>how much Germall Plus we would need for various batch sizes if the

>Germall Plus were used at 0.3%.

>

>Batch Size (lbs): 0.25 lbs

>Batch Size (oz): 4 ounces

>Batch Size (grams): 113.4 grams

>Germall Plus Percentage: 0.3 %

>Weight of Germall Plus (grams): 0.3402 grams

>Weight of Germall Plus (oz): 0.012 ounce(s)

>

>Batch Size (lbs): 0.5 lbs

>Batch Size (oz): 8 ounces

>Batch Size (grams): 226.8 grams

>Germall Plus Percentage: 0.3 %

>Weight of Germall Plus (grams): 0.6804 grams

>Weight of Germall Plus (oz): 0.024 ounce(s)

>

>Batch Size (lbs): 0.75 lbs

>Batch Size (oz): 12 ounces

>Batch Size (grams): 340.2 grams

>Germall Plus Percentage: 0.3 %

>Weight of Germall Plus (grams): 1.0206 grams

>Weight of Germall Plus (oz): 0.036 ounce(s)

>

>Batch Size (lbs): 1 lbs

>Batch Size (oz): 16 ounces

>Batch Size (grams): 453.6 grams

>Germall Plus Percentage: 0.3 %

>Weight of Germall Plus (grams): 1.3608 grams

>Weight of Germall Plus (oz): 0.048 ounce(s)

>

>Batch Size (lbs): 1.25 lbs

>Batch Size (oz): 20 ounces

>Batch Size (grams): 567 grams

>Germall Plus Percentage: 0.3 %

>Weight of Germall Plus (grams): 1.701 grams

>Weight of Germall Plus (oz): 0.06 ounce(s)

>

>Batch Size (lbs): 1.5 lbs

>Batch Size (oz): 24 ounces

>Batch Size (grams): 680.4 grams

>Germall Plus Percentage: 0.3 %

>Weight of Germall Plus (grams): 2.0412 grams

>Weight of Germall Plus (oz): 0.072 ounce(s)

>

>Batch Size (lbs): 1.75 lbs

>Batch Size (oz): 28 ounces

>Batch Size (grams): 793.8 grams

>Germall Plus Percentage: 0.3 %

>Weight of Germall Plus (grams): 2.3814 grams

>Weight of Germall Plus (oz): 0.084 ounce(s)

>

>Batch Size (lbs): 2 lbs

>Batch Size (oz): 32 ounces

>Batch Size (grams): 907.2 grams

>Germall Plus Percentage: 0.3 %

>Weight of Germall Plus (grams): 2.7216 grams

>Weight of Germall Plus (oz): 0.096 ounce(s)

>

>Batch Size (lbs): 3 lbs

>Batch Size (oz): 48 ounces

>Batch Size (grams): 1360.8 grams

>Germall Plus Percentage: 0.3 %

>Weight of Germall Plus (grams): 4.0824 grams

>Weight of Germall Plus (oz): 0.144 ounce(s)

>

>Batch Size (lbs): 4 lbs

>Batch Size (oz): 64 ounces

>Batch Size (grams): 1814.4 grams

>Germall Plus Percentage: 0.3 %

>Weight of Germall Plus (grams): 5.4432 grams

>Weight of Germall Plus (oz): 0.192 ounce(s)

>

>Batch Size (lbs): 5 lbs

>Batch Size (oz): 80 ounces

>Batch Size (grams): 2268 grams

>Germall Plus Percentage: 0.3 %

>Weight of Germall Plus (grams): 6.804 grams

>Weight of Germall Plus (oz): 0.24 ounce(s)

>

>Batch Size (lbs): 6 lbs

>Batch Size (oz): 96 ounces

>Batch Size (grams): 2721.6 grams

>Germall Plus Percentage: 0.3 %

>Weight of Germall Plus (grams): 8.1648 grams

>Weight of Germall Plus (oz): 0.288 ounce(s)

>

>So, if we can accurately weigh out, rounding off, 0.68 grams or 0.02

>oz, we can make up an 8 ounce batch. But how large must the test batch

>be if our scale can only read to 0.25 oz? Our test batch must be 5 lbs

>or more to insure accuracy. That seems like a big batch to make every

>time you want to try a new formula out with Germall Plus. It would

>seem to me that the raw material cost would be prohibitive.

>

>If you consider using Germall II or Germall 115 at 0.3%, you'll have to

>include Methylparaben (0.2% max) and Propylparaben (0.15% max).

>

>I think it would be easier for many HomeCrafters and small manufactures

>to use Germaben II, Liquid Germall Plus or Phenonip as preservative

>systems because they are designed to be used at higher levels.

Maurice

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

Maurice O. Hevey

Convergent Cosmetics, Inc.

http://www.ConvergentCosmetics.com