
Something I get asked a lot is "why is the denatured alcohol you use in your stove burning video green?" Well the simple answer is so that I can see it more easily, but there are other reasons why I do this to my fuel. It's a really simple trick that I like to use so I thought I'd take the time to share it here.
Denatured alcohol is clear, highly flammable and generally not a good thing to swallow - you already know this of course. However, your new hiking buddy who just grabbed the innocuous looking unlabeled water bottle that you carry your fuel in and is about to take a swig of out of it also probably knows this, but doesn't know what's inside the bottle because it looks just like water!!!

I know denatured alcohol has a pretty pungent smell to it, but trust me when I say that I have seen, on more than one occasion, people pick up and take a chug on a water bottle that contained denatured alcohol by mistake - it's a horrible thing and extremely dangerous especially if you're already a fair way into your hike.
So the first thing you must always do to your fuel bottle is CLEARLY label it. Large bold type and skull and cross bones are definitely applicable here. If you do nothing else after reading this post than pick up a Sharpie and label your fuel bottle then you've at least done something important.
So, getting back to the green colored alcohol question, there is one other thing I like to do with my denatured alcohol that definitely helps with the safety issue of accidental drinking and which has some additional benefits - I add food coloring to it! Green as a matter of fact.

Two or three drops of food coloring added to a full 16oz bottle of denatured alcohol is enough to turn it a very unnatural color and alert any unsuspecting thirsty hiker that it is something other than plain water inside. As I said I like to use green because there are very few drinks or liquids that I carry in a large bottle that would be bright green in color. This works even better if the bottle you are using is clear or transparent unlike the green bottle I am showing in the demo, but you get the point.
In my experience, adding two or three drops of food coloring to a large amount of denatured alcohol does nothing to impact the efficiency of the fuel, at least none that I can notice. If you don't like the idea of doing this then that's fine with me, it works for me and so I thought I'd share it.
I originally used the food coloring trick to avoid accidental consumption of my fuel, but have found that there are additional benefits of the coloring that I had not anticipated, such as making it much easier to measure and see where you are pouring it.
Sometimes when I'm out on the trail in bright daylight it can be very hard to see the denatured alcohol as I'm pouring it into the stove or around the priming ring depending on which stove I am using. Having the food coloring added to the alcohol makes it much more visible and relatively easy to see where I am pouring the fuel.
I don't always measure my fuel before pouring it into the stove, again it really depends on what stove I am using, but this is another area where having the food coloring added to the fuel can make measuring it much easier to see.

And for those of you that have asked, the green food coloring does not make the flame more visible! You'll have to continue be careful about the sleeves of you fleece or base layer going up in flames as you reach over the stove and pick up your cup or pot. I wish the food coloring made the flame easier to see, but that has not been the case for me - so please be careful!
Have you ever tried adding food coloring to your denatured alcohol?
Making Denatured Alcohol User Friendly
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34 comments:
That's a great tip! I am not worried about chugging my own denatured alcohol, but I could easily see a friend getting it by accident after asking if they could use some of my water.
Thanks Amy, despite the smell of denatured alcohol I've seen plenty of thirst hikers chug on fuel by mistake. It's never happened with bright green fuel :-)
I have always used heat but only had the problem once and that was with the exwife and the bottle was clearly marked "DO NOT DRINK, POISON... THIS IS NOT WATER".. Im guessing I have missed something with your stove, what version is the sove you are showing pictured? I dont think I have seen one like that before.. is it more efficient with the can flaps like that?
Excellent tip Brian! I keep a patch of HOT PINK duct tape on my bottle with skull and cross bones drawn on the tape. You really need to get rid of that plastic measuring cup it's so 2010 :-)
http://jjmatheshikes.blogspot.com/2011/03/how-do-you-measure-your-alcohol.html
The white squares in your pictures are very distracting. They began appearing after your Mountain hike.
IE8 here - layout is messed up - picture footers mixed through the text. Interestingly, denatured alcohol sold here in Belgium has already blue coloring in it.
In the usa coloring all denatured alcohol would be considered a government intrusion on your right to be poisoned
People still use IE to browse, who knew? I haven't seen that issue with IE7,8 or 9 but I'll take a look. If you can send me a screenshot of what you are seeing that will help me out tremendously!
Too funny, sadly very true!
Actually no, I have been using them for months now. The majority of feedback that I get is that people love them, you're the first negative feedback that I have received, but I appreciate you letting me know that they are a distraction. I'll probably use them more sparingly going forward - promise!
It's a prototype variation of the new Flatcat stove made for use with cups like Snow Peaks. I am testing it for the manufacturer at the moment so I'm not at liberty to say much more at this point - expect a post all about it in near future! Wicked little stove BTW :-)
Nice, would be nice to do that myself... never attempted to test stuff for other people though
If these are the same things as the white circles that appear on mouse-over with information, I'll vote some positive feedback here...
I'm not sure if its all meths (denatured alcohol) in nz, but I've bought purple stuff. I assume that the small amount of food colouring would result in no noticeable soot or smoke.
I guess you don't add salts to your fuel to fix the colourless problem because of the corrosion problem?
Adam, yes that's what those are. I think they add value but willing to hear what others have to say. Thanks for the first official thumbs up!
It's something I thoroughly enjoy. It takes more time than you would think to do a really detailed test of a product, make sure you are using it in the intended way, in the right environment, take accurate notes, shoot photos and write up the blog post or feedback email (I don't blog all the equipment I test, about 50/50).
I get a kick out of seeing the feedback and suggestions I provide be rolled into improvements in the final product, that's pretty cool to me.
If it's the purple stuff I'm pretty sure its the same as meths from the UK. There's been no noticeable soot or smoke as a result of adding the coloring that I have experienced, it's such a negligible amount I can't imagine it making much of a difference.
I've never heard of adding salts to fule or of a corrosion problem. Can you give any more details?
Thanks for the tip. That will be one that I will be sure to incorporate just because it looks cool... :) On my larger size 16 oz soda bottle fuel bottles I have printed off the ole skull and cross bones and have it wrapped around the bottle just as a soda label is, big and cannot be missed. The smaller 4 & 8 oz fuel bottles are not labeled because they are more obviously not to be drank from. But, after this, I may print some more skull & crossbones labels and adhere them to the smaller bottles too... Thanks for the post!
Stick, better safe than sorry I guess. Big stickers are perfect, I just use the coloring as a quick visual reminder that this is not water :-)
About.com has a page about coloring flames. Not sure how it would affect your pot though.
http://chemistry.about.com/cs/howtos/a/aa052703a.htm
Shortly after I posted this, I noticed this warning:
"Don't color BBQ fire! The colorants may produce pretty flames, but they can also produce toxic food."
I wouldn't try it in your fuel, but a campfire might be fun.
Thanks Jeff, proof that it doesn't have to be complicated to be good!
very good tips ! thank you for sharing !
Excellent idea. I like that you can really tell which is alcohol and not just water. I am going to have to try this out the next time I go out. I try labeling mine but sharpie and other inks just wash off when you get some alcohol on the outside of the bottle. Very good post.
I've only used boric acid to turn meths flames green, but it only takes a bit. You should try the salt out in a stove you don't mind damaging to test the efficiency. I think there's a good chance you'll have corrosion problems though. Salt is not good for metals.
Definitely try it though.
BUT they are willing to color kerosene red so that truck drivers can't get away with running it instead of diesel...
I cleaned wax from inside of a 6 gallon wine jug with denatured alcohol. How do I remove the terrible odor from inside the jug?
Do you mean the smell of the denatured alcohol? You could always try peeing in the jug :-)
Anyone else have any better suggestions?
Great idea. i have always marked fuel with a black marker. Denatured alcohol can clean the marker right off the bottle. Food coloring works.
i checked on instructables about the salt... seems to be commonly done... also found instructions for "salting out" isopropyl alcohol to get better flamability.
I've read about the salt options, but I have not actually tried it. Did you test it out?
Adding Green coloring is a great idea! (...good thing your name's not white! :D)
Ha! I try to show others the benefits of being 'Green' as much as I can =)
Great idea on adding salt .... I'll have to try it'
I never put my denatured alcohol in a bottle shaped like a drinking bottle (coke, gaterade, etc) due to the risk of someone mistaking the shape for a water bottle in the middle of the night.
I use either the triangle shaped cough syrup bottle or the oval shaped mouth wash bottles. They are tougher and just by feel in the middle of the night in the tent I know I do not have my hands on water.
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