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11 unusual uses for coffee

11 unusual uses for coffee
Every coffee drinker knows the feeling they get when they have their morning ritual of a hot strong cup of coffee. Mmmmmm, just saying the word makes me smell it in the air; coffee. As a longtime coffee consumer and avid caffeine-scientist I've seen my way around more than a few pots of potent, percolating brain juice. We all know the great benefits of coffee, it's:
  • Hot
  • Caffeinated
  • Awesome
But did you know that coffee has a life outside of being a tasty bevvy? It's true! Coffee grounds can continue to be useful after you've had your morning fix and can work in some interesting ways. So, save those beans and find 11 unusual uses for coffee!


 
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Step 1In the garden

in the garden
Compost:
Spent coffee grounds can be mixed with lye to make a great composting agent, you can even throw in the coffee filter, too!
Worms in compost like to eat the bacterium that grows on the facets of coffee grounds, though the grounds themselves are a a food source it also adds grit to the worms' digestive system allowing them to digest better.

Fertilizer:
Small amounts of coffee grounds can be added directly to top soil, especially on plants that like high acidity in the soil like azaleas or roses. Coffee is high in nitrogen, calcium, magnesium, potassium and other trace minerals, spreading around a thin layer of coffee grounds on your soil will allow a slow release of these minerals into your plants.

Be aware of which plants like acidic soil (roses), and which plants don't (tomatoes).

Insect Repellant:
Coffee has a very strong odour which many insects and animals do not like. In addition, it's been suggested that mosquitoes, ants, slugs and maggots all dislike the acidity of coffee and will stay away from areas where there is high concentration of acidic soil.
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46 comments
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Apr 28, 2012. 7:42 PMwhisperonthewind says:
My daughter used to just eat the coffee beans, grabbing a few from the coffee grinder in the grocery store. She would tell me they tasted like nuts. I actually had to try them, and she was right, they do taste like nuts. I don't care for the feel, but the taste was nutty.
Apr 27, 2012. 2:51 AMaburden says:
ill release this secret to the world...
coffee is great to drink, it provides you with a shot term energy boost. you mix it with milk, how water and sugar to make a drink. but i just mix with hot water.
Mar 15, 2012. 8:41 AMTakelababy says:
Dried coffee grounds can also be sprinkled on the floor before dry mopping. Adds a bit of shine and grabs the dust. Then compost it.
Feb 4, 2012. 9:46 PMdbell says:
I might have missed it in a comment, but you didn't mention using coffee to develop film and photographic paper! Check it out; search "caffenol" - it's real!
Jan 28, 2012. 2:48 AMslpr says:

Mixed with your normal moisturizer coffee does also provide an emergency tan, never used it myself but my housemate does. Also, olbas oil is the only thing I have found effective in stopping the genocidal tenancies of my 2 cats towards my houseplants.
Dec 19, 2011. 10:50 PMRandom_Canadian says:
It would appear that 2 out of 3 of my cats actually love the smell of coffee. One will come running when the grinder is running
Jan 8, 2012. 10:04 PMAnachronistCook says:
I have to agree here, my cat is notorious for drinking out of and knocking over guests' coffee cups (also, stealing their cigarettes) so I'm pretty sure coffee grounds would have him licking the dirt rather than running away from it... o.O
Jan 13, 2012. 2:20 PMKensHappyWife says:
Haha! Sounds like your cat has some habits to kick! =)
Jan 13, 2012. 4:12 PMAnachronistCook says:
hehe no kidding... I have no idea where he got those preferences though, since neither my husband nor I smoke or drink coffee o.O My brother theorizes that he was a trucker in a past life... ^.~
Dec 11, 2011. 12:10 PMdcumisky says:
Coffee mixed with washing soda and water can be used to develop black and white film. Can't remember the amounts off the top of my head but a quick look here should sort you out.
http://www.caffenol.org/
Jan 7, 2012. 10:31 AMjakebaldwin says:
http://content.photojojo.com/tutorials/coffee-caffenol-film-developing/

It's fun! Also, saying that the chemicals "combine to smell like grim death" is an understatement.
Jan 3, 2012. 10:04 AMlkuziez9680 says:
coffee can also enhance a chocolate flavor- like if you put a dash of instant coffee in hot chocolate it tastes great
Dec 13, 2011. 7:21 PMthemadjeweler says:
HAHA! I love that with the beard. You remind me of an Old West Cowboy. Person. Or something.
Dec 21, 2011. 11:50 AMsiafulinux says:
Kids loved the faux beard pic! :)
Dec 18, 2011. 5:46 AMStalkerBear says:
Another use for ground coffee is to stop inside mouth bleeding (most probably all type of bleeding).
My friend's 3 yo bled from inside of his lip - 10 changes of ice didn't stop the bleeding, a little of ground coffee stopped it in around 10 seconds.
Dec 12, 2011. 10:50 PMjlund says:
Just put the roasted beans in your mouth and chew now you have even stronger than coffee
Nov 25, 2011. 9:03 AMbwoodfield says:
I use coffee as a wood stain quite often. Take dark roast coffee and mix with boiling water in a 1:1 ratio. Let the mixture cool for a good couple of hours with the grounds in the water. By the time it's cooled the liquid is an very dark brown, almost black color. Filter the grounds out and apply liberally with a wide brush. Expect to apply at least 3 coats, the more coats the darker it will be. I made shelves for my wife and applied around 6 coats of coffee stain. The wood came out with a deep walnut color in the end.

Keep in mind though, you are applying water to wood. If you're staining a large piece there is a chance that it will cause the wood to warp. In addition make sure you allow the wood to dry slightly between coats. This will minimize the warping as it won't stay wet for a long period of time.

The wood will also have a very matte finish to it once it's done being stained. I apply polyurethane to my pieces after to seal the wood and give it a slight gloss, giving a light sanding between each coat to smooth out the finish.
Dec 11, 2011. 2:24 PMachong0 says:
You can also use cooking oil to get a nice finish on your wood, just get the untreated wood and rub in some cooking oil. Wipe off the excess and leave it for a while. Depending on the environment the wood is in, it might excrete some of the oil over time, so just wipe it down a couple more times and you get a nice shiny finish :)
Dec 11, 2011. 12:44 PMmarymac says:
If some of the polyurthanes can be thinned with water or cleaned up with water, couldn't the coffee mixed in with it to make a new kind of finish for the wood? Still, I would think that a few coats would be better, too.
Nov 9, 2011. 6:16 PMstickmop says:
Like the frig idea, fresh ground coffee will sweeten your ice chest after a camping trip. Just toss a tablespoon or two in and forget about it until it's time for the next trip. Then rinse and refill it. If the cooler is grody, then use the abrasive qualities of the grounds to help clean it.

And if you spill something in your car, tossing fresh grounds on the carpet will help mask the odor until you can get rid of the spill.
Dec 11, 2011. 12:47 PMmarymac says:
LOL....I spilled a good bit of coffee (already brewed) in my car and I can't get rid of the coffee smell. Maybe that was a good "accident".
Dec 11, 2011. 1:11 PMstickmop says:
Hehe, were you trying to predict the weather with it?

http://www.instructables.com/id/Predict-weather-with-a-cup-of-coffee/
Dec 9, 2011. 12:30 PMmidsummermuse says:
This idea totally works! But to make it even simpler and more eco-friendly, I just pop out my damp used cone filter with the coffee grounds in it and pop it into a coffee mug and stick it in the back bottom of the fridge. It gets refreshed as often as we make coffee! :-)
Nov 28, 2011. 8:43 PMgogglecrab says:
You should read this article, I bet you could add some things from it! : )
Nov 15, 2011. 7:33 AMcolorex says:
I made my own coffee air freshener a bit different, though it looks more awesome!

I just grabbed a lid from a Nutella jar (that looks like a drinking glass) and a grid from an old desktop computer PSU. 5 second later:
Nov 26, 2011. 5:32 AMjoespicnictables says:
awesome idea! :D
Nov 11, 2011. 6:06 AMRollingRick2020 says:
If you're looking for a good source of coffee grounds try your neighborhood coffee shops. A lot of them like my local coffee roaster actually bag them up and give them away, although some may charge a convenience fee. They are very popular with gardeners, like this post shows, for adding to compost and the worms do love the rich Nitrogen content.
Nov 10, 2011. 8:50 AMgogglecrab says:
(removed by author or community request)
Nov 10, 2011. 9:53 PMgogglecrab says:
Thanks a lot!
Nov 10, 2011. 9:06 PMscoochmaroo says:
Coffee beans make an excellent stand in for pie weights too! (of course, so do carpentry nuts)
Nov 10, 2011. 4:49 PMwilgubeast says:
These are great. Humorous, well-researched, and with stellar pictures. Well-played, sir.
Nov 10, 2011. 3:18 PMapurva naik says:
really cool!
do you know coffee powder can also be used as a blood clotting agent to stop the blood flowing from a small wound?
it doesn't hurt at all and use can easily use this on small cuts etc.
but you should not use it on larger wounds where stitches may be required because application of coffee makes stitching really difficult.
Nov 10, 2011. 9:20 AMembochner says:
working in a restaurant we used coffee frequently for cuts. it works very well, ive used it on myself many times, even on larger wounds with no problems
Nov 10, 2011. 7:27 AMdepotdevoid says:
Ah, this makes me sad. I had to quit drinking coffee a couple of months ago, it was exacerbating my heartburn problem.

Still, excellent instructable, and the faux beard picture is comedy gold!
Nov 10, 2011. 8:49 AMamw4444 says:
depotdevoid you should try this product. One of the best coffee substitutes I have found. In fact we use half coffee and half Teeccino every day. You can brew it just like coffee. I have no other relationship to this company other than a loyal customer for over 10 years.
http://www.teeccino.com/
Nov 10, 2011. 9:38 AMdepotdevoid says:
Huh, I may try that some day. I didn't really think to go looking for an actual substitute to coffee, instead I've been hitting the tea pretty hard. I went cold turkey from caffeine altogether for about three weeks, but that wasn't a lot of fun (not even close to how bad quitting smoking was, but still no fun). I've grown to really like a good green tea, which in addition to being a nice hot drink with plenty of caffeine (both required for a happy depotdevoid in the morning), it doesn't have the heavy acidity you get from coffee.
Nov 10, 2011. 8:40 AMBjornOmarsson says:
This concept (step 9) can also be applied to create a heavy duty hand scrub! If you find your hands all greased up after a motor project, or have specs of paint after a paint job, stay away from those cleaning chemicals! Just use regular hand soap and a pinch of coffee grounds and scrub away!
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Author:mikeasaurus(michaelsaurus.com)
I'm the Play Editor here at Instructables! I like mixing old ideas with new and reusing things not for their intended purpose; the results are sometimes messy but always fun. I also write the thrift-...
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