What’s the Deal with Charcoal Bamboo?

Charcoal sticks

We often get questions about charcoal bamboo rayon and its emerging trend as a cloth diapering fabric. We don’t carry charcoal bamboo, and we want you to know why.

You may have seen charcoal bamboo rayon used for cloth diaper inserts or the absorbent inner layer of a diaper. You will notice because the fabric is charcoal grey. Charcoal doesn’t just refer to the nice, grey colour, though.

Charcoal bamboo is rayon with added nanoparticles of charcoal, which is made from bamboo. During the process of making rayon from bamboo (drying, aging, ripening—essentially cooking), other materials can be added. Any cellulose fiber can be used to make rayon, and many materials can be added to the goo phases of the process. In this case, bamboo is heated, creating charcoal, then the charcoal is ground into a very fine powder so small that the particles are called nanoparticles. (Nano refers to size. A nanometer is one billionth of a meter like a centimeter is one hundredth of a meter.)

Charcoal nano-particles can be added to any extruded fiber. You might find charcoal polyester fleece or charcoal microfiber in addition to charcoal bamboo rayon. All of these fibers are extruded—like pasta dough through a spaghetti press.

Charcoal bamboo and other charcoal fibers first came to the North American market through import co-ops—the same import co-ops that bring us cheap, unsupported diapers. We’ve talked before about the hidden costs of cheap diapers and of imports (laborsafetyqualityenvironmentsustainability). Basically, these products externalize costs. You save money in the short run while you and others pay in other ways. Cheap is only inexpensive when you don’t notice the ripple of consequences.

Questions We Hear about Charcoal Bamboo

Doesn’t bamboo charcoal nanotechnology kill bacteria?

First of all, what are you trying to kill? Washing diapers kills bacteria through heat and detergent. What more needs to be killed? Even if charcoal nanotechnology does kill bacteria, I’m not sure that this is a desirable characteristic of a diaper.

Second, I don’t know. I see that manufacturers of fabric make this claim, but I also see those selling bamboo rayon continuing to claim antimicrobial properties of bamboo rayon when the U.S. Federal Trade Commission absolutely states that there is no evidence in support of this claim for rayon. According to the FTC, “Even when bamboo is the ‘plant source’ used to create rayon, no traits of the original plant are left in the finished product.” Manufacturers and retailers continue to fight the FTC over this, and I see small cloth diaper sellers repeating claims that have been debunked. The only difference I see so far with charcoal bamboo rayon is that it is newer, so the claims haven’t been argued with regulatory bodies—yet.

Isn’t charcoal bamboo just another natural fabric?

What is often just called “bamboo” is bamboo rayon, a manufactured fiber. We wrote about the process of creating rayon from bamboo in “Hemp vs Bamboo Rayon for Cloth Diapers.” This manufactured fabric is made from natural inputs (bamboo and other cellulose), but the processing is far from natural. This is another issue that U.S. FTC takes seriously. Claim this is a natural or environmentally-friendly fiber, and they will sue. If you still see the claims, maybe they just haven’t gotten around to the lawsuit yet. They are already busy with bamboo rayon marketing and labeling claims.

I heard charcoal bamboo contain natural oils. Does it?

Sometimes I don’t even know where to start. Let’s start with no. Bamboo rayon has no natural oils. Even mechanically processed (non-rayon) bamboo has no oils. Rayon is not a natural fiber; it is manufactured fiber. If there are oils in your fabric, they are the oils added during the knitting or weaving process to help the fibers move through the machines as the fabric is created. Oils, sure; natural oils, not so much.

Is charcoal bamboo rayon approved for the North American market?

That is an interesting question, and I don’t know the answer.

I heard that charcoal bamboo rayon calms the mind.

I’ll just wait until the science comes in on that one.

Are You Willing to Submit to an Experiment?

I would like to go back to one very important point: safety. One of the most important complaints made about co-op diapers that are imported without regard for legalities is their lack of compliance to safety regulations.

The problem with cheaper materials isn’t just the potential de-lamination of a diaper cover, as an example. Smell that off-gassing? Those molecules escaping from unstable polymers have an effect on your brain and your body when you breathe them. That is why some phthalates have been banned in certain children’s products. Imagine what those unsafe soft plastics can do when placed against the most sensitive skin on your baby’s body. Soft plastics, though, are already under regulation. If you buy diaper covers that are CPSIA compliant, you know they don’t contain banned soft plastics.

What about nanotechnology? We mentioned the nanotechnology in conventional sunscreens last month. Those particles “are designed to be absorbed into the skin.” Can nano-particles of charcoal be absorbed into the skin? What are the potential consequences of that? Are other nano-particles added to rayon? Some textile processes use both nanosilver and nanocharcoal. Is that true of charcoal bamboo? We wrote about the use of nanosilver as an antimicrobial and found that the science showing potential harm is building up. Where is the independent science that shows no harm will come to your baby from absorbing nano-particles of charcoal through the genitals? What are the short-term effects? What are the long-term effects?

If that science isn’t available, using nanotechnology on your baby in this way is experimentation. This is the wrong way around. We don’t just try things out on our babies first then work out whether it’s safe. Prove safety first.

Let’s back up a long way and start over with the first question.

Why don’t you carry bamboo charcoal diapers?

We prefer domestic products over imports, and bamboo charcoal fabric and products are all imports. The same companies referred to in our Cheapie Leakies post are importing a lot of charcoal bamboo rayon products. Low-quality imports like this are just a non-starter for us.

We will not test new technologies on your baby. Until a product or material is proven safe, we will not carry it in our store.

We choose the simplest solutions that work for our customers. When there are already basic, natural materials that do the simple job of a cloth diaper, there is no need for nanotechnology just for the sake of the technology—especially when questions of safety remain.

So, no, we won’t be carrying charcoal bamboo products until or unless we become convinced that it is safe for your baby, until the benefits have been proven, and until the benefits of nanotechnology outweigh the benefits of natural fibers.

You can count on bynature.ca to look into new products, but we will not jump on bandwagons.

Yesterday, we asked what our Facebook followers thought of charcoal bamboo in diapers. Not one of the dozen people who answered was willing to experiment with this nanotechnology in diapers.

Related Articles

Cheapie Leakies – Cloth diapers in general have SO much value compared to single-use products. And, many cloth diapers that seem higher priced actually reflect the value of products made ethically and sustainably, not cheaply and without care for workers or the environment. These high value products are also safety tested to the highest standards, so you can be assured you’re buying something that is safe for your little one.

Cheap Products—At What Cost? – You already know what we think of cheap imports if you read our 6-part “At What Cost?” series last year on labour, safety, quality, environment, and sustainability.

Antimicrobial Overkill – Use of disinfectants such as nano silver in everyday situations is overkill. Even in more extreme situations, there is a lot of debate about whether the antimicrobial benefits outweigh the potential risks.

6 Questions about Natural Sunscreen That We Hear Daily – What are nano particles, and why does it matter if my sunscreen is free of these? The concern is that nano particles could enter the human body.

Hemp vs Bamboo Rayon for Cloth Diapers – There are efforts to add nano-particles of charcoal to make the fiber antibacterial.

Image © Dianazh | Dreamstime.com

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9 thoughts on “What’s the Deal with Charcoal Bamboo?”

  1. As always, thank you for the great information!

    I will admit that a few weeks ago we jumped on the charcoal bamboo train and purchased two diapers. While I love the absorbency that they have offered I now wish I had looked into exactly what was the process behind that fad material!

    • If I’d seen it in the store, I probably would have tried it just because I love that charcoal grey color. Since writing the post I learned that, in the U.S., charcoal bamboo rayon needs to be tested for lead in order to comply with children’s product safety regulations. We just need to test new ideas before we try them on our babies. Maybe it turns out to be fine.

        • Justen, any baby product is supposed to be tested for lead. If it has been, the manufacturer or importer is required to provide a Children’s Product Certificate (CPC) that gives details of the lead test. Ask for it.

  2. Just cancelled a huge co-op order after reading this. THANK YOU! I will not be testing any new technology on my sweet baby girl!!!! <3

  3. You have a bit of misinformation in your article. The only CPSIA standards that cloth diapers are held to are flammability standards. Cloth diapers fall under the general clothing category in which there are no regulations for lead or phthalate levels.

    • Brigitte, I hate to disappoint you, but cloth diapers, being a children’s product, must comply with far more than U.S federal flammability standards (which are not part of the CPSIA). To learn more about the specific requirements of CPSIA and other children’s product laws and regulations as they apply to cloth diapers, see the webcast created by the CPSC (Consumer Product Safety Commission) Small Business Ombudsman for members of Real Diaper Industry Association, the cloth diaper industry trade association. Go to the Small Business Ombudsman’s page and look for “Manufacturers of Cloth Diapers: Applicable CPSC Children’s Product Safety Rules” near the bottom of the page. Having been intimately involved in understanding regulations and helping the cloth diaper, toy, and baby carrier industries comply over the past 5 years, I know well the law and the application of the law through the Consumer Product Safety Commission.

  4. Hi there,
    I was very interested in your background information and happy that now I didn’t yet order any charcoal night diaper. But in the meantime some time has passed since you wrote this article, I wanted to know if you know of any new developments or tests? Cause of course more and more brands are starting to use the charcoal…

    • Leen, I don’t know of any tests that show the safety of charcoal for this application. I wouldn’t put it on my baby, that’s for sure. Thanks for asking. If I do come across any new information, I’ll post here.


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