How To Make Liquid Hand Soap from Bar Soap

A couple of weeks ago, I noticed that our soap dispenser is low on soap and we’re out of refill.  A light bulb went off and I thought maybe I can make liquid hand soap.

Last week, I started googling for soap making directions.  The first few search results were how to make liquid hand soap from bar soap.  That was just perfect because KT and I love to collect bar soaps.  We especially love the handmade bar soaps that we find at local shops and farmers markets whenever we travel.  They smell so so good.  That translates to a nice stash of bar soaps I can use to make liquid hand soap.

I read through a few website/blogs for how-to directions and my favorites are the Better MomSavvy Housekeeping, and wikiHow.  If you click through those links, you’ll noticed that the ratio of ingredients are very different from site to site.  My conclusion is that it really all comes down to the type of bar soap you use.  (From reading through a lot of sites and comments – the biggest problem is making liquid soap from Dove bars.  So if you REALLY want to use Dove bars, you should probably use these directions).

STEP ONE  - Pick out a bar of soap

I decided to use a 6 oz bar from Napa Soap Company.

Here are the ingredients on the back.

STEP TWO - Grate the bar of soap with a grator

I got this As Seen on TV Graty for Christmas one year.  Since I don’t eat cheese or grate anything else, this has been sitting in the box for a while.  I’m so glad I finally found a use for it.  I had to cut up the soap into one inch cubes so they would fit in the grater.

STEP THREE - Add water to the grated soap and melt on the stove top

I added about 5 cups of water.  Since I really don’t know how much water I need for this particular bar of soap, I decided to start out with just enough water to melt the soap shavings.  I figure I can add more water as it thickens.

It melted in less than five minutes over medium heat.

STEP FOUR - Add a tablespoon of glycerin

Again, I figure I can add more later if needed.  We already had this from when KT made me a snow globe last Christmas.  KT wanted to point out that liquid glycerin was quite difficult to find.  He had to go to several drug stores to find it.

STEP FIVE - Add more water if needed

I added four more cups of water.  It hasn’t thicken yet but I figured I should be safe with a minimum of ten cups of water and I’m only at nine cups. The consistency is very watery but smooth.  The melted soap, water, and glycerin are mixed very well.

STEP SIX - Turn off the stove and let it cool and thicken overnight

It started noticeably thickening after six hours.  It looks like this picture below the next morning, after 15 hours.

STEP SEVEN - Stir the concoction real well to get a smooth consistency and test it out

KT tested it for me while I take some pictures.

Hooray it suds and left his hand feeling squeaky clean.  He did very cleverly point out that his hands were clean to begin with.  o_O

STEP EIGHT - Bottle it up

KT just so happened to finish off a two-liter bottle coke and it perfectly holds a little less than 9 cups of liquid soap (taking into account evaporation).

It looks like we’re well on our way to needing a fill up. =)

5 thoughts on “How To Make Liquid Hand Soap from Bar Soap

  1. Pingback: Dr Bronner Castile Foaming Hand Soap | Carol Drive

  2. Glad I came across this link going to try the recipe for Dove to see if it will work any better.
    This is what I did to make mine and it’s like water.I used a bar of Dove soap.
    1 bar soap
    10 c water
    1 Tbs glycerin
    Turn on medium-low heat and stir until the soap dissolves.Let the soap cool completely, then pour into containers using a funnel and that’s it well that sure wasn’t it :). So maybe the recipe you gave on Dove will come out thicker then the one I made.

  3. Hey =)
    I saw your recipe, looks easy
    did it turn slimy or snot like later?
    I tried doing this with lux bars a few times and ended with really thick, gloop type thing that solidified so much that i couldn’t get it out of the bottle i put it in and yes I used about 10 cups water to 2 bars of soap. The smell vanished too later on after heating. Did that happen with your soap?
    I love the thought of DIY projects but usually ends it disasters =(

    • Hey, thanks for stopping by. =) It’s been five months and we’re still using the same batch I made in October. I’m happy to report that the consistency of the soap hasn’t changed and my soap still retains its fragrance. When I first made the batch though, it did turn a little slimy and slippery after it cooled. I think next time, I would just use less glycerin. I did a little research on Lux bar soaps and if they have as much moisturizer in them like Dove bars, I would suggest this recipe: DIY Dove Liquid Soap. You wouldn’t need glycerin (which will make your soap too thick) and you would use less water. I didn’t have any problems with the smell vanishing when I heated up the soap but you can always use essential oil to add some fragrance to your finished product. I have my share of DIY disasters so Good Luck! =)

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