Soap with used cooking oil

Easy and cheap way of making soap.
Avoid the obstruction of kitchen pipes and the polution made by the used cooking oil!

Step 1 Materials

You will need this materials to make a good home made soap.

Comments

[travcoman45]

Does this soap ever come "trace" stage? I've tried 3 batch's and it never seems to be right. I've measured everything very carefully and it just doesn't come out right.

[kibrun]

Thanks. Great stuff. Already tried it but i found that the pH is quite high - around 10 to 11 using a pH paper. I made my soap using half of the quantity of the listed materials. The soap is really hard to come off from my hand compared to regular soap. It saves me from buying soap but I need extra amount of water to clear it off. Any suggestion to make it less "soapy" ?

[one_fake_user]

Sounds like the NaOH quantity is off. If it feels soapy then more oil needs to be added, particularly if the pH is so high, NaOH is an alkaline substance. That soapy feeling is actually the NaOH turning the fat in the cell walls of your skin into soap, enjoy! :D. Don't worry though, either way the soapy feeling will go. Because you will either have no skin left, or the pH balance has been corrected ;)

[kibrun]

Yeah, i think you're right. In the next batch i reduced my NaOH by 10%. Still give me a good soap :) I think we can make do with this recipe, it is up to the individual to make adjustment to him/ her liking. In my case, maybe the quality of oil that I used, and maybe the quality of my NaOH ( i bought it from a very remote hardware store somewhere in a suburban area 90km from my home). This stuff is already illegal to the public (in raw form) in my country because they said somebody can make some kind of ecstacy drug or something with it.

The soap is good though. I'm using them to wash my dishes. Thanks Vitorgil :)

[AmyLuthien]

"1. mesure the cooking oil and put on a recipient after filtering impurities out"
What is a recipient?

[xerofdv]

container

[soapwytch]

Soap made with lye should be cured a MINIMUM of 4 weeks before using on your body. Old, used oils should not be used to make soap unless it's for laundry soap and even then it would be iffy because the oils will go rancid. Unless it was just for an experiment I would never suggest using "used" oil for soap making.

[jennivie]

If you're making cold process soap then yes 4 to 6 weeks to cure the soap, but if you make hot process soap it can be used as soon as it hardens.

[dggriffi]

using used vegetable oil for soap is common and just fine.  Impurities should be filtered out before the process begins.

[nubiana str]

how do you filter the used cooking oil? Also, did it smell like fish or chicken in soap form?

[vitorgil]

Fish can be hard, but the caustic soda will take almost any smell.

[alchristinechan]

in following this soap making process, what kind of soap will it produce? laundry soap or soap for the body? just wondering. :)

[vitorgil]

It´s more indicated to wash your hands or the laundry. I like to paint usually I use it to clean the brushes it works perfectly.

[geta]

Eu am inteles ca daca a pus balsam de haine inseamna ca este pentru rufe .

[s.g.]

what type of oil are u using? and specifically, what is the use of this soap? is it for laundry or is it a hypoallergenic soap? thnk u very much! :))

[Bretzielovesjedi28]

question....Y my soap doesn't turn white....it turns brown???

[mh1688]

To recycle the cooking/frying oils into household cleaning soaps is the long exist process in Asian countries for many generations. This is an ecological method of reducing environment pollution and was published by United Nation Civil Society of Brazilian Foundation of America.

tap://esango.un.org/irene/Index?page=viewPractice&nr=43

Since the oil has been break down due to the extended high temperature cycles, the trace of cold process soapmaking starts immediate after the oil combines with lye water. You can use the lemongrass or lavender infused water in this process to eliminate the light oily smell. The soap will be ready after 3 weeks of curing. The PH should be at 8 or less. It is safe for your skin.

We have produced the eco-friendly soap with the oils that we collected from neighbourhood restaurants for charity fund raising. The cleaning power is extremely strong. On top of that, this soap is enriched with natural glycerin that was produced by the natural saponification process. It helps your skin to retain moisture after you use it. Your skin won't feel dry or cracked.

Due to the nature of the oil, this soap is not recommended to use on your body or on your pet. You can use it to clean your dishes, oven, stoves, laundry, floors and any other household cleaning. You also can make liquid soap with it by thread the soap then add one part of hot lavender infused water and 2 part of hot water. Stir gently, let stand 30 minutes then stir again. Let stand overnight then gently stir again. It can replace your hand liquid soap, kitchen dish detergent and laundry detergent.

[Darcy777]

Friendly note to the readers. ALWAYS pour the lye crystals into the water and not the other way around - for safety reasons. It is shown correctly but I wanted to really emphasize this. If the lye in the water becomes a hard clump, no worries, GENTLY keep stirring and it will dissolve.

[sam12587]

Does it just pop out of those accurate cups after curing?? And can you just slice it up like a cake from that cat box or do you need to pop it out first? I might try this and I just want to make sure I understand the whole process & don't destroy my soap at the end :-)

[vitorgil]

Yes it's easy to pop out of the cups, you can do since you feel the soap have become solid then slice it.

[dchall8]

If you are trying this in the US, find a recipe in ounces and pounds before you try it. Soap is a relatively safe chemistry experiment that can go dangerously wrong if you make one simple mistake. Caustic soda (sodium hydroxide or lye) is not something to play around with.

[wolfsingleton]

My wife does a very similar method, but she scents the oil itself before reusing. If you plan ahead and have a dedicated vessel for the oil, place your 'scent' in the bottom before dumping in the hot oil. My wife collects lilacs from the yard and puts about one big handful of torn off petals into a 5 gallon bucket then fills it about 3/4 with warm oil and then adds another handful of lilac petals. Cover the bucket and slosh around a few minutes before allowing to sit for a couple of days. When you filter, the leaves come out but the smell remains! We have also had some success using orange juice or peppermint leaves, but other options haven't come out too well. Hope this helps with the scenting issue for those wanting to keep it natural. Keep up the great work.

[lemonie]

Bacon-aroma soap? L

[vitorgil]

No way it will smell like real soap. Just try it!

[PKM]

Would it be a good idea to clean and filter the oil first? I'm sure it makes good soap but I'd prefer to have soap without bits of food in it :)

[vitorgil]

Yes, you should clean the oil frist.

[lemonie]

Thanks - I actually want to make bio-diesel, but I might try it. You don't mention adding any fragrance, so I imagine the smell is just "soapy"? L

[PKM]

Hmm, biodiesel you say? Do you have a source of "second generation" plant oil (ie. algae, jatropha, hemp)? WVO will work for now but I suspect it's only a matter of time before commercial recycling starts up- if collecting WVO, processing and paying fuel duty on it can be anything like competitive with petrodiesel then someone will do it, and then it won't be a waste product any more.

One of my pie-in-the-sky ideas is to set up a sunlight-to-diesel machine- imagine a basement-sized contraption with an algae bioreactor feeding into a press for extracting oil, feeding into a biodiesel processor. A few solar panels outside for the energy needs (heating/blending/pumping etc) and you essentially have the green revolution in machine form.

[lemonie]

I've got a pint-glass full of saturated animal-fat. However, looking out the back of the pub, I did see 3 drums of what must be used cooking oil from the take-aways a bit further down.
Think how much stuff gets fried every day - it's going somewhere, but when it's been used for cooking it's potential fuel?

L

[iPodGuy]

They added fabric softener. That's where the scent comes from.

[lemonie]

I'd thought that was only for making laundry-soap by the "for clothes", but looking at it again it's the way you put it. L

[richardsalt]

really ingenious - thanks!

[Skip]

I've heard -and don't take this as scripture- that the clear soaps are made by adding some alcohol to the mix. Anyone interested in attempting that?

[ericsgonzalez]

i am confused. After it turns white, it should be used within two weeks? or after two weeks of curing?

[vitorgil]

The soap should be used after two weeks of curing.

[rimar2000]

This is very useful, thanks.