JooSoap (English)

joosoap eco-soap making english


Making your own soap allows you to customize the shape and scent of your soap.

Soap made from used cooking oil is environmentally friendly. Your soap will be free from preservatives, artificial colors and parabens. Homemade soap will not leave harmful chemicals into the water system.

Homemade soap moisturizes hands and is a natural cleaning solution for your home.

a big bowl and ladle could stand over 75。C / molds
1 liter of used cooking oil / 150 g NaOH (lye) / 290 cc Water / fragrance

1 Liter of used cooking oil could made about 10x100g ecosoap

1. In a bowl, add lye to water mixing slowly. Mix until the lye has dissolved and the mixture is  clear. This mixture heat up and create steam due to chemical reaction. Be careful with the heat and not to breathe the steam.

2. When the temperature of lye water are cool down to around (40-45。C / if your oil is very clean: 45-50。C), a bit higher than body temperature. Then pour the used cooking oil into the lye. This will create the soap mix.

3. Stir the soap mix thoroughly until it reaches “trace”.

4. Once the soap mix reaches trace, a bit sticky liquid, add the essential oils or fragrances.

5. Stir the soap mix and pour it into the soap molds.

6. After the soap has solidified(about 2-3 days), remove the soap from the molds.

7. Allow the soap to dry for 4-6 weeks.

Download instruction: Joosoap Making(English)


Detailed step by steps illustrations, click an image to start full-screen slide show.


10 thoughts on “JooSoap (English)

    1. Thanks for the comment. I won’t suggest using for bathing because we are not sure what is the condition of your used cooking oil and what kind of food you fried, are you allergic to some kind of food…but we do use it to wash dirty/greasy hands. You could test from your hands, and if you think your oil is quite clean, I think you could go ahead to taking a shower. 🙂

  1. HI
    I have been running my vehicles on veggie oil for the last 5 years or so and have just started making soap with it as well. I get my oil from a fish and Chip van and also a high end restaurant/hotel. It is predominantly canola oil but of course has some animal fats etc from cooking. I settle it for three weeks minimum, then filter it through a 5 micron filter, then make soap out of it (or burn it in my car).
    Since starting this I have been using it for hands, bath , shampoo etc and it works great for all. Even before i is really “cured”, since I started using it within a few days. I now find I don’t need to use conditioner on my hair. Some of the soap has cured now and other than getting harder with time, the soap works about the same.
    I have added a bit of coconut oil to improve its cleaning and hardness (based on internet reading), but I can’t really tell the difference.
    The only challenge I am having is colouring the soap, wince I want to use all natural ingredients that I can extract myself from plants or whatever. So far using carrot juice as a replacement for water mixed with the lye is the only colour I can get…a very nice yellowy-orange. I continue to experiment, but now have a house filling up with soap!

    Have fun and try lots of things…p.s….that goes for life AND soap making.



    1. Hi Gerry,
      Thanks for your sharing! It’s great to hear your story of making use of used cooking oil.
      Are you using the similar recipe and methods as we do? I am interested in the tool you use for filter the used cooking oil, is it expensive?

      It would be nice if you could share some photos to us, I am working on collecting some stories of people making these type of JooSoap 😀

      JooSoap (
      Ying-Ju Lin

  2. Hi

    I pour it through a 200 micron mesh bag (6″ diameter and 30″ long – many sizes are available) into a drum that is on a stand a little higher than its own height. This filter is just to get the bigger bits out and capture some of the slugged.
    I then let it settle for at least three weeks (longer if the temperature is below about 5 degrees C or so). I then gravity feed it through another similar sized bag, but is 5 micron filter. these filters are available at an industrial filtering place (maybe other places too but I get mine from an industrial supplier in Vancouver B.C. Canada, near where live.
    These filters come in various sizes and filtering capacities and are only about $6 Canadian each. I wash out the 200 micron filter every 200 litres or so and find that once the oil has settled for the three weeks, the second filter only needs changing every 3 or four drums (drums hold 207 litres).
    I also have a centrifuge that I am going to try soon, but that cost nearly $300…it should alleviate the three week settling time and other filtering. When I have completed my testing on that I will let you know what happened.
    I read somewhere that someone used flour to help settle or clarify the oil and am going to try that as well.

    I have been using the calculator, but when I compare it to others I find that it errs on the side of over-superfatting so I often use two calculators and take a happy medium for the lye amounts used. I shoot for the 5% superfat target and find that the soap, although greasy in the first day or so, is OK to use after two or three days. I usually use the oldest soap I have first as it does mellow out and lather better after a few weeks.

    I am trying not to buy oil (I get it free from a restaurant) so have been using mostly the canola they supply, but have been adding some coconut and castor oil. Colouring has been a challenge so far. Carrot juice in place of water gives a nice yellow soap, otherwise my attempts have produced only variations in beige/light brown. I am fairly new to this so am still experimenting a lot.

    I hope this helps.



    1. Hi Gerry,
      Thanks a lot again for your insight and journey. It’s good to see you found things from the market that help to manage big quantity of used cooking oil, and I would say it’s a great idea to use mesh bags and it’s not expensive. I will keep in mind if we have that much quantity of used cooking oil need to deal with in the future. 🙂 Thanks for sharing calculator to us, many good sources there.
      Since we are working on small guides for organizing JooSoap workshop/events so I haven’t actually trying on coloring by nature ways. Good luck to your experimentation 🙂
      JooSoap Ying-Ju

  3. Hi,

    Can I use KOH (potassium hydroxide) instead of sodium based lye? If so, how much KOH should I use for this recipe?



    1. Hi,
      mostly I see KOH are using in making liquid soap, but I think you could. Sorry, we haven’t done it before and doesn’t have recipe for that. maybe you could find some information in 🙂
      Good luck and share us if you succeeded. 😀

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