An Artist in a Laboratory

Sagarin, Edward, The Science and Art of Perfumery, New York, NY: Greenberg, 1955. 

The post title is the chapter title from The Science and Art of Perfumery, a book that captures how I feel about fragrance. The book was rebound into a blue, dull cover, and when I picked it up from the library, I didn't expect much from it. But it is one of my favorite overviews on the subject, covering a wide array of topics in a short and enjoyable read. I really liked Sagarin's writing style, often beautiful but never flowery, and filled with quote from poetry and prose.

The book starts with the history of fragrance, followed by a few chapters on the materials. When Sagarin discusses musk, it is sounds so tragic. The hunters lure the musk deer out by playing on flutes, leading these poor creatures to their deaths. I don't know if that's how it really worked, but it creates such a sad image to me.

From the natural materials Sagarin moves on to the creation of the early synthetics, first their attempts to duplicate, and then their attempts to create brand new aromachemicals. "An Artist in a Laboratory" is the first chapter on fragrance creation, and that, along with a chapter on flavors, tries to capture the odd nature of this work. On the one hand you're surrounded by the tools of a chemist, but on the other you're exploring the delicate nuances of a scent.

Sagarin breaks down the elements of a sample formula, covering the essential oils and molecules used. There are also chapters on odor description, marketing, business, and medicine. Despite the numerous topics, everything ties together nicely, with the rich history of perfume holding it all together. Even at the end of the book, instead of a bibliography, there is a historical overview of perfumery literature.

On the surface perfumery may seem simple, but a single fragrance can involve millions of considerations. Do you use this jasmine or that one? Even if they're pretty close, at a molecular level, they might have differences that can change the feeling of a scent. Should you use materials from endangered species? For me, it's easy to say I want to avoid the animal ingredients, but what about rosewood and sandalwood? Is it better to use synthetic materials instead with the hope of limiting environmental destruction? You need to consider the toxicity and allergenicity of the materials used, regardless of how they're derived. You need to make sure it smell good in the final product- fragrances used for laundry detergents have different considerations than personal fragrances. 

And then there's what you want to say with the fragrance you're creating. Even with all the science that goes into it, in the end you want a piece of art that speaks not only to you, but hopefully to someone else as well.

Rose Science- The scent and color of rose varies widely depending on the exact species and the type of extraction.

"And indeed there will be time
To wonder, “Do I dare?” and, “Do I dare?”
Time to turn back and descend the stair,
With a bald spot in the middle of my hair —
(They will say: “How his hair is growing thin!”)
My morning coat, my collar mounting firmly to the chin,
My necktie rich and modest, but asserted by a simple pin —
(They will say: “But how his arms and legs are thin!”)
Do I dare
Disturb the universe?
In a minute there is time

For decisions and revisions which a minute will reverse."

-T.S. Eliot, The Love Song of J. Alfred Prufrock

In the Works and Preservatives (again)

It's been rather difficult thinking about products for fall and winter, when it feels summery or spring-like here in the Bay Area. I have a few items I will post soon for the fall, plus some wintery items. These were my favorite seasons when I lived in New England, with the changing leaves and then the snow. I don't miss the summers there though- hot and humid.

I will be introducing a few body sprays that use hydrosols in the next few weeks, and since these have water, I will be using preservatives. At first I wanted to to avoid preservatives, mostly because I wanted to say all of my products are preservative free. But that's silly. One is derived from radishes- Leucidal (Leuconostoc/Radish Root Ferment Filtrate), and the other is potassium sorbate, a food grade preservative. I'm also using alcohol in some products, because I really don't want anything growing in them. 

I do microbial testing on the products, and so far everything looks good- nice and clear, with zero growths. Preservatives are better than any of the nasty things that can grow on those slides.

Learning About Lotions Part 4 - Other Ingredients

I've concentrated on preservatives and emulsifiers, since those two are key ingredients that are to find in a natural and effective form. After those two ingredients, it should be easy to find everything else as close to natural as you care for it to be.

Water- The simplest choice is distilled water (not purified or tap, since those might introduce things to your lotion you don't want). You can also try hydrosols and aloe vera juice, plus some other things I'm sure I'm not thinking about. Some hydrosols and aloe do include preservatives, so you might want to consider that when choosing your liquid.

I wonder if you could use wine or beer in a lotion, like you can with a soap. Though you might end up smelling like you've been at a bar all night and had too much to drink.

Oils- So many kinds, including the butters like cocoa, butter, and shea. I use strictly plant based oils, but there are animal oils (lanolin, emu, etc.) that are available. Looking at some suppliers, I'm surprised to see all the oils I never knew existed!

Humectants- Humectants draw in water or help to retain it, making the lotion a better moisturizer for your skin. Glycerin is a well known natural humectant, with the disadvantage that it can be kind of sticky. I've taken to using sodium lactate instead of glycerin, since I think it feels better, and it also can be added to soaps help them harden. Sodium lactate is derived from the fermentation of sugars, usually from corn or beet. Since I began looking into lotions, I've become interested in Honeyquat, a conditioning humectant derived from honey.

Antioxidants- Use these to extend your oils so they don't rancid too quickly. Rosemary oleoresin extract (ROE) and Vitamin E T-50 are both good choices- I often use one or both in my oil based products.

Additional Additives- There are a lot of additional things you can put in lotions- waxes, thickeners (like xanthan gum), and extracts, plus other ingredients depending on your goal. If you want to add a little color to your lotion, you can add a bit (not too much, since you don't want to color your skin!). Use essential oils for a natural scent or fragrance oils if you're fine with using those. For colors and fragrance oils, make sure you're only using things that are safe for the skin.

Learning About Lotions Part 3- Emulsifiers

Water + Oil + Sodium Hydroxide = Soap
Water + Oil + Emulsifier = Lotion
That's if all goes well, and there's obviously more to both of them than that. When I learned about lotions a few years ago, I heard about emulsifying wax (sometimes called E-Wax). It's a popular emulsifier for homemade lotions and it works well. Melting the wax and blending it in while still hot to your oils and waters creates your lotion.

A bit later I read about BTMS 50 (INCI: Behentrimonium Methosulfate (and) Cetearyl Alcohol), a conditioning emulsifier. It works well in conditioners, and when used it lotions it can give a powdery feel to the skin. This is a cationic emulsifier, so some preservatives might not work with it.

Some makers use beeswax and borax to create a natural emulsifier, but it doesn't create a stable emulsion. These will need to be shaken to mix the water and oils back together. I find separated lotions kind of gross, and usually toss any I have once they do separate. These lotions were using different emulsifiers and took a couple of years to separate. I'd be disappointed if I had one breaking down so soon.

In my recent experiments I am trying Olivem 1000 (INCI: Cetearyl Olivate (and) Sorbitan Olivate). An olive derived emulsifier sounded cool, plus it emulsifies by forming liquid crystals. But it does have some issues with stability. Adding a thickener like xanthan gum or a co-emulsifier helps stabilize it.

There are a lot of other emulsifiers out there, but these are the three I've tried. I haven't tried (or been tempted to try) the beeswax and borax method.

I'm not particularly interested in emulsifiers, but here are a few things you might want to look into if you are:
Use of silicones
Types of emulsion: Water in Oil, Oil in Water, Water in Silicone
Cold Emulsions
Self-emulsifiers (you don't need to add additional oils to some of these)
Type of product (lotion, conditioner, spray, etc.)
Cationic/non-ionic/anionic
Co-emulsifiers
Stabilizers

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.

Soap making- Pros and Cons of the Different Methods

Note: If you're interested in the soap making methods below, The Nova Studio in Point Richmond, CA offers classes on most of them.

I've tried a lot of the different kinds of soap making out there, so I figured I'd write about the different types, for those interested. I'm making some at the moment, so it seems like an appropriate time.

A lot of soap you buy in the supermarket isn't really soap, but a detergent bar. Soap involves the reaction of lye and fats to make a solid. Those who buy or make handmade soap are probably most familiar with cold process or melt and pour soaps. I'll start with cold process.

Cold process isn't totally cold- when you add lye to your water, it heats up rather quickly, you also need to melt your oils and butters, and then when the soap is in it's mold, it's probably creating heat as well. I know that's probably obvious to a lot of people out there, but I still feel cold process is a bit of a misnomer. Safety is a bit of a concern, but with proper precautions (goggles, gloves, and covering yourself up, plus keeping your lye away from children & pets), it can be a safe and fun way to make soap. I'm admittedly not too good at it, though that's more to do with my experimental recipes thickening up to quickly. Impatience also doesn't help, since I might combine my lyes and oils too fast.

The advantages to cold process include freedom to choose your own oils & liquids and creating beautiful designs. You're also starting with raw ingredients, so it's totally handmade. I'm honestly in awe of what some people do with cold process soap- amazing swirls, fancy layers, and beautiful colors. There are a few disadvantages, which can be avoided to a degree. Start with good instructions and a good lye calculator, and you've avoided a lot of them. Using tested recipes from a trusted source also helps when you're beginning. One of the biggest issues is a bad batch, at which point you have to either toss a lot of soap or rebatch it. You're also a bit limited in scents you can use. With fragrance oils, buy them from a store that mentions any issues that can come up from using the oils, such as ricing, seizing, or accelerating trace. Some of these problems can arise from using essential oils as well. And while I've seen recipes calling for sandalwood and rose essential oils, this would be impractical for many people. This would cost a lot of money, though it would make for a lovely soap.

While not necessarily a problem, cold process needs several weeks to cure, during which time some water evaporates out (leaving you with a harder bar) and the lye fully saponifies. Which brings us to hot process soap. There are a few ways of doing hot process soap, but I make mine in a crock pot. Your soap essentially cooks, leaving you with fully saponified soap that's ready to use (though it can benefit from curing time as well). There are fewer fragrances you can use, since anything with a low flash point will not survive the high heat. You don't need as much as with cold process though, so it can save you a little money. Colorants are a bigger issue, since some of them don't work well in hot process. It's also much thicker than cold process soap, so when it comes time to pour, it's harder to make nice designs. I still like making it though, since there are generally no surprises once you pour it into the mold.

Melt and pour is a good beginner's soap- you can pick up supplies at a craft store, making it more accessible. If you really like it though, better supplies are available online, and you'll save money that way, too. It is what it says it is- you cut up and melt your soap base, add colorants/scent/additives and then pour it into a mold. While you don't get to choose what your soap is totally made of, since you're starting with a base, you can use all sorts of colorants and scents, and create fancy designs in pretty molds. It's also safe for kids to make, since you're not using caustic ingredients. It's a nice way to get into soap making, if you're not sure if you want to try making cold process soaps. One big disadvantage is that it can sweat if not packaged properly, leaving clear beads all over your soap. This isn't very attractive, though wrapping it in plastic wrap seems to help keep this at bay.

Want a real challenge? It's possible to make your own melt and pour from scratch. I have never done this, though I've learned how to in a class. Too me it seems like a lot of trouble for something that you can more easily buy, I guess that can be said of all soap making. It's more complicated than cold or hot process soap, and involves extra ingredients. The soap I saw made wasn't crystal clear, though the sample I did melt down and I was able to pour it. It could be worth it for someone who wants to make translucent soaps from scratch.

Another challenge is liquid soap- this is a longer, more drawn out process, and requires potassium hydroxide instead of sodium hydroxide. I make this every few months for personal use, starting on a Saturday night and ending on a Sunday afternoon. You start by making a soap paste, which you then add to distilled water to get your liquid soap. I've had mixed results, though with some experimentation and research, I can sometimes get a nice thick gel. Other times it's a bit runny, and every time it's a dark yellow color. Insoluble ingredients fall out, so if you don't want that to end up in your finished product, you need the soap to sit for several days before pouring into your bottles. I also use a recipe that starts off lye heavy to make sure all the fats are saponified, and then I need to adjust pH once it's dissolved in the water. Some scents don't mix well with the final product, so that requires testing. While I probably won't ever make it to sell, since I find the end results unreliable, it is nice to make a liquid soap for less money than what you buy at the store. And I feel great when I do make a nice batch.

As mentioned in cold process, one more way to make soap is rebatching or hand milling. This involves grating up your soap, melting it down (in a double boiler, in an oven bag in your oven, or in a heat proof bag in a crock pot of water), adding your scent/colors/additives and then pouring into your mold. Often the melted down soap is more of a paste, so it's usually more like glopping it into your mold. You can create your soap specifically with this in mind, or use it as a way to possibly salvage a botched batch of cold process soap. It gives you more freedom in terms of scents and additives. I am making rebatched soap today- one that I using soap specifically for this purpose, the other using a batch of funky soap. Should the first batch come out nicely enough, I will be selling it at some point. It's has chamomile powder and lemon essential oil. The color isn't the nicest, since the chamomile powder turned it a muddy yellow, but I'm hoping the benefits of the soap out way it's appearance. The funky batch is currently melting in a double boiler. Even if the final result is better than the initial soap, it won't be for sale, since I don't want to risk selling a bad bar.

Book Review- An Introduction to Perfumery

An Introduction to Perfumery, 2nd ed., by Tony Curtis and David G. Williams, Port Washington, NY: Micelle Press, 2001 (reprinted 2007 and 2009 with corrections).  ISBN: 9780960875283 (USA) 9781870228244 (UK)

This is a textbook- not light reading, and while it's called an introduction, it's pretty intense for someone who might want a few ideas of things to blend to make a perfume. A lot of it is about working at a perfume house, and if you're anything like me, that's not happening. It goes over things like the chemistry and business of perfumery, including the things you might not want to think about, such as the household cleaners that need scenting. A lot of the experiments talk about using a lab, and if you're just sitting at home reading this, chances are you won't be able to do a lot of them.

I wanted to start with that so that no one invests the money in this book who won't find it suitable for their needs. For me personally, this was a great book, though not always the most fun to read. It covers many aspects, including the aroma chemicals and essential oils that might want to learn about, plus experiments on creating floral bases, such as lilac, rose, and gardenia. If you're interested primarily in natural perfumery, this book is probably not the best for you, since it doesn't go in depth into how to use the naturals.

I liked how it covered the chemistry aspects of perfumery, though those sections were sometimes daunting. The applications of perfumery sections were useful in learning exactly why chemistry is so important- not all scents are suited to all applications. It was a bit silly the way they talked about fragrance and some products you don't associate with fine perfumery, but products like laundry detergent and dish soap have their scents developed by perfumers.

As someone who thinks about top, middle, and base notes, it was also interesting to think of how some products don't need an evolving scent- for example, candles need to give off the same scent throughout their burning.

While the business sections of the book might be interesting for someone, they're more focused on big businesses rather than small, independent perfumers. It covers things like marketing, management, operations, and product development.

While I would not recommend this book to most people, I do think anyone who has a serious interest in all aspects of perfumery and fragrance might be able to useful. While I was certainly bored at times while reading the book, overall I'm glad I read it.

Art vs. Craft vs. Science vs. Gimmick

I was looking for spring/summer craft shows to apply to, and I looked at the pages for some art shows. These types of things go by all sorts of names, so I'll look at pretty much anything that sounds sort of promising. Of course these art shows are "fine art" shows, and fragrance is not an included category. I realize a lot of what I make wouldn't fall under the category of fine art, but I strongly feel that fragrance doesn't get the respect it deserves.

Most perfumes that people buy are more about marketing than scent. Sure, the scent counts, but most of the money goes into making the packaging pretty and paying for all the ads. I don't know if the people making these scents consider it an art, or if they're sitting in their labs looking at what's needed and figuring out the cheapest way to get there while still making a scent that people will wear. Those scents are mostly science- a degree in organic chemistry is actually very useful to anyone wanting to work in a big perfume house. There are some commercial perfumes, and definitely a lot of niche perfumes, that are art. To me it seems like what separates the fine art of fragrance is the passion that goes into, making the best you can with what you have, and creating a scent that has some meaning, even if that will never be clear to 99% of the population. You need mastery over the materials, just like you would with any other fine art.

I aim to be a perfume artist, and hope that if I'm not there yet, I will be soon. Working with scent can be a craft as well. When I assist at a perfume's class, the scents that people make are sometimes nice, but they don't rise to the level of art. That's not to be harsh, but a great perfume requires more time and thought than can be fit into an 8 hour class.

And a lot of what I do is craft- hair oils, lip balm, foot balm, lotions bars- those really aren't art. The scents are usually blended so that the product smells pleasant, usually with hopes of bringing hopes of some benefits to the product as well. So there's a bit of science in there too- nothing that would make me a scientist, but I do research which ingredients do what. Soap makers are working with science and craft. I don't know if those who make fancy swirls and designs consider their soaps works of art or not. I've seen some truly beautiful soaps (nothing I've made- I'm lucky if mine aren't plain ugly), but I'm not sure if there will be a gallery of beautiful soaps, or soap displays at museums. I guess in that sense perfume is getting a little more recognition, since there are occasionally exhibits dedicated to scent.

Beauty products are usually somewhere between craft and science. The ones you see at chain stores are probably mostly science, though don't necessarily fall for all the claims on their boxes. Just because something is made by people wearing white coats in a lab, it doesn't mean it will make your wrinkles disappear. Those who make beauty products on a smaller scale probably do use some science knowledge. You need to understand things like emulsion, preservative systems, and what each ingredient brings to the finished product. But these are handcrafted, not made on an industrial scale.

And then there are beauty products that are gimmicks. These are the most painful to me. I see single oils (like argan oil) being bottled up and sold at a large mark up. If you want 50ml of pure argan oil for less than $48, email me and I'll make you a bottle for less. While some of my products only use a few ingredients, I don't create single ingredients products and then sell them for a huge profit. Though I suppose if those companies are spending a lot of money on marketing, they might not be making such huge profits after all.

TL;DR- I want perfume to enter the world of fine art, and hope to be a fine perfume artist myself. Most of my products are craft, with a dash of science. And I will not sell you a gimmicky product like a single ingredient at a high mark up, unless you ask me to (at which point I'd reduce the markup).

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.