Learning About Lotions Part 5 - The Results

A few weeks ago I made a batch of lotions to try out the "natural" preservatives along with the olive-based emulsifier. I do think with further trials and adjusting the formula it could all be made to work fine. This would involve quite a bit more studying, money, and time, and so in the end I will not be pursuing lotions.

I had split one batch into two, adding Synercide Asian Fusion to one half (Water, Caprylyl Glycol, Hexylene Glycol, Wasabi Root Extract, Ginger Root Extract, Garlic Bulb Extract), and Leucidal (Leuconostoc/Radish Root Ferment Filtrate) to the other. Before splitting the lotion I had added a few preservative extracts (elderberry, aspen bark, and willow bark.) I also included helichrysum extract, which isn't a preservative, but does help with preserving. So far both batches have held up, but it's too early to tell if the preservative systems are working properly. And without challenge testing, I won't know for sure how safe they are.

I had hoped to test each preservative separately (with the exception of the helichrysum extract, which is not a preservative), but I realized I didn't have enough appropriate containers to do so. I'm also unsure if splitting the batch in two is better than creating two separate batches for testing.

I used Olivem 1000 (Cetearyl Olivate and Sorbitan Olivate) for the emulsifier with Oliwax (Hydrogenated Olive Oil, Olive Oil, Olive Oil Unsaponifiables) to help stabilize the emulsion. Using xanthan gum instead of the Oliwax might have worked better, but I really wanted to try the Oliwax. One of the biggest issues I had was melting the Olivem. If I use it again, I'll need to find a better way to melt it, since my pathetic double boiler set up did not work well.

I'm not sure if the emulsifier hadn't melted properly or wasn't properly blended in, but the Synercide half did not emulsify well. This was the bottom half of the mixture, with the Leucidal half being poured off into another container. The lotion with Synercide is thin and runny, and the water separates out to the bottom when sitting for awhile. I just shake it and use it, but it is gross looking at it when it has separated. The Leucidal lotion has not experienced any of the separation and has a thicker consistency.

Learning About Lotions Part 2- Preservatives Continued

While there are several preservatives available now, the most important thing is that the preservative used works. When I made lotion the first few times, I just followed a basic recipe and didn't give much thought to inhospitable conditions for the preservative. Looking into them more now, there are various factors to consider. I've listed a few of them below.

1. Temperature
This one is an easy one to adjust for. Find out the temperature at which it's safe to add, and then during cool down, check the temperature and add the preservative when it's low enough. A few can withstand higher temperatures, so you might be able to add those to the water phase (possibly oil phase, though I don't recall seeing one that's added to the oil phase).

2. pH
This is one of my favorite considerations. You get to play with pH test strips or a fancy pH tester, though for now I'm sticking with the test strips. Preservatives seem to prefer acidic environments, though some will work at higher pH levels.

3. Reactions & Compatibilities
 You need to make sure your preservative won't react with another ingredient, leading to something like benzene in your lotion. You need to make sure it works with all ingredients, such as cationic/non-ionic/anionic surfactants and your emulsifier.

4. Light exposure
I've only seen this so far in reference to Tinosan, but if you use that preservative, you should make sure to avoid exposing the preservative to light, and you will need to test the final product if you use anything other than opaque bottles. Tinosan actually sounds fairly interesting since it contains silver citrate. I think that sounds pretty cool.

5. Benefits
Some of the natural preservatives offer benefits on top of preserving your product. For example, willow bark extract is a natural source of salicylic acid-like ingredients, so it can improve your skin.

6. Broad Spectrum
If the preservative used kills only one type of nasty (bacteria (gram positive and negative), yeast, fungus, or mold), you'll need to add another to kill the others.

7. Solubility
Usually you add preservatives to products that contain water, but you might add one to an oil-based scrub that will be exposed to water. In this case you need to find a preservative that is soluble in anhydrous solutions.

Learning about Lotions Part 1- Preservatives

I've started researching preservatives and other lotion ingredients, and soon I will start experimenting with making lotions again. I don't know if I'll sell lotions- it depends on how the experiments work out. I'll be writing about the various elements of lotions as I go. These are general thoughts, not in depth information on any one item. I find researching lotion making very exciting, and I want to share that knowledge with people who might not know what goes into making lotions. I think it's important to know what is going into the products you use, why they're there, and how they work.

I have made lotions and creams in the past, but I haven't made any to sell. If I were to sell any, I couldn't market my brand as preservative free, because there's no way I'm selling a lotion without something to keep it safe. Recently I've started to feel like calling Ivre de Fleurs a preservative brand is causing me to be a part of the scaremongering against preservatives, and I don't want that. I want to make products as naturally as I can, but I also don't want to be limited to using only ingredients that the average person can pronounce.

I'm starting with some natural preservatives in my experiments. It sounds like they don't work well for the most part, but maybe I can get them to work somehow. The ones I'm trying now are various fermentations and extracts, and some offer additional benefits beyond preserving. If they don't work, I'll start looking into other preservatives. A broad-spectrum preservative system is important to keep your water-based products free from bacteria, yeast, mold, and fungus out there. I've got a little kit to test for preservative efficacy, so I should be able to determine some things quickly, but then you have to make sure it works over time (no separating, no mold or fungus, no other nasty things). If I have a good recipe, I'd need to send it off for challenge testing, to make sure it's verified safe.

Parabens are one of the preservatives that you hear most often about, and usually not in a good way. Parabens are actually really good at preserving products, they are used at very small percentages, and I'm not convinced they'll lead me to a long and painful death. While a lot of people don't bother to check the labels of their beauty products, those that do often don't want parabens in them, so I'll be skipping them.

By the way, honeysuckle extract has a molecule that acts like a paraben. I've only read a little into it, and I'm not sure if it's effective as parabens are, but if you are avoiding parabens, you might want to add honeysuckle extract to your list of ingredients to avoid. Grapefruit seed extract might also have parabens in it- the parabens are being used to preserve the extract, and are then helping to preserve the final product. It seems like there's a lot of controversy on grapefruit seed extract, so I don't want to go there.

Formaldehyde donors are another type of preservative, but I haven't read too much into them yet. I have no plans to use them, but I'd still like to read up on them some more.

There are a few preservatives that can be listed as "parfum" or "fragrance" on a label. If a product claims to be preservative free but lists fragrance, they may or may not be using that fragrance to preserve the product. I've read of two- one that has a rosy scent, and another that's more vanilla/almond. I'm slightly confused as to why fragrance would be preferable to preservatives, but I guess it depends on why you're avoiding an ingredient.

Hydrosols

Lately I've been researching hydrosols- water that has been used to distill a plant for its essential oil. While they are usually a byproduct of essential oil distillation,  sometimes the distillation is done specifically for creating the hydrosol. They are often cheaper than the essential oil, perhaps always, but I haven't looked too much into it yet. The scent is lighter, and often quite different than the fragrance of the essential oil.

Witch hazel is one of the most common hydrosols, and you can often find it at your drugstore, mixed with 14% alcohol as a preservative. You can sometimes find rose or orange blossom waters in the baking section.

The problem with hydrosols is that since they do contain water, they can go bad. If you're buying small amounts for personal use, it's probably safe to keep it in your refrigerator and use them quickly.While looking into hydrosols, I also started looking into preservatives, since I wouldn't want to sell anything that could go bad easily. While I didn't want to use preservatives in my products at first, after doing some research, I've found some that I would be comfortable using in my products. If the tests turn out well, I might have some hydrosol products available for sale soon. There is also alcohol- a good amount of high proof alcohol also acts as a preservative (see witch hazel, above).

I have bought several small bottles of hydrosols, and while I plan on moving forward with using some of them, others were not so appealing. Yarrow is almost gag-inducing. There are also some fruit hydrosols out there, which can be used to create natural fragrances with strawberry, apple, and other fruity scents.

Women and Science

I love science. There is so much out there in science, and I really regret not pursuing it in college. I was rather good at chemistry, did well in biology, and had so much fun in bacteriology. I never did physics, mostly because I wasn't going to be able to get into "honors" class since I didn't take the "honors" Algebra II class. I'm not much of a math person, though I did well in the classes that I did take. My chemistry class in college was simpler than the chemistry class I took in high school, and while it was interesting, it was practically a joke.

I see stuff in the news about getting little girls interested in STEM subjects, with Goldie Blox and what not, but I think there needs to be more focus on keeping teenage girls interested in science, and let them know what studying science can lead to career-wise. I'm more interested in science (in particular the parts that relate to beauty products and scent), but technology, engineering, and math probably have interesting career paths that should be considered and promoted.

Science feels like it's come up a lot for me personally in the last few years. Being married to a software engineer (who reads physics textbooks for fun) certainly helps with that, but in other ways as well. At my most recent show, I was asked by a few people whether I had a science background. While most of the beauty products I make don't involve complex scientific knowledge, there is still science to them. I study the properties of different oils and butters- the types of fats in them can change how they work, so the oil you need depends on the type of product you're making.

Soap making is fun, because it involves a chemical reaction right before your eyes- lye (either sodium hydroxide or potassium hydroxide in water) combines with oil to make soap! At least real soap, not the detergents you'll see sold at most stores. You need to use some math (not scary math, and there are calculators available online just for this purpose) to calculate how much lye you need to saponify your oils. Different oils have different requirements for lye, and typically you're using more than one type of oil to make your soap. This goes back to the above, where the composition of the oils bring different properties to your soap. Since you don't want any lye left over in your soap, you superfat your recipe, which means you need to calculate your lye so that not all of the oils are saponified. Superfatting  means you're left with some left over oils in your soap, which makes it good for you skin.

Lotions present a different set of science issues- like soap, you're combining oil and water, but you want different results.An emulsifier is needed to keep the water and oil from separating. You have water phases and oil phases, you keep track of their temperatures, and combine them into a magical creamy lotion. Then you need a preservative- this is where biology and bacteriology come in. Lotions are good breeding grounds for all sorts mold, bacteria, fungus, etc., so a preservative slows that growth down.

I've been getting my science fix that way for awhile, but now I'm spending more time studying chemistry in regards to perfumery. There's the components of the essential oils, plus I'm reading up on some of the aromachemicals out there.

Preservatives

Recently, I went to open a sample bottle of toner (from a fairly well known brand) when I noticed something dark on the side. I thought it might be a smudge on the outside, but it was in the bottle. It was a dark flake of something, probably mold. I definitely wasn't going to use that toner. This was a sealed bottle, stored in a dark, cool, dry spot. Looking at the ingredients, there were no obvious preservatives.

Preservatives come in different forms (parabens are one type that many have heard of and are trying to avoid) and protect aqueous products from growing mold, bacteria, and other nasty things. Products such as scrubs that don't contain water, but are likely to end up getting water in them, might also contain preservatives. Generally, only a small amount of the preservative is needed- you will usually see them at the bottom of the ingredients list.

I sidestep the preservative issue by not making products that use water. This way I can keep Ivre de Fleurs preservative free, while not worrying about if my product is safe. I add antioxidants, Vitamin E and Rosemary Oleoresin Extract, to many of my products to increase their shelf life. Oils might not turn moldy on their own, but they can go rancid, and the antioxidants keep the oils fresher for longer.
I know a lot of people don't care if their products have preservatives, but others don't want to use products with any preservatives in them. I try to minimize my use of products with preservatives, since I don't know what the long term ramifications of using them will be. I don't avoid them completely, though. If I'm using a lotion, I'm fine with the small amount of preservatives in it, since I don't want to deal with the more immediate issues of mold and bacteria.