Reforming Soap Scraps

Many people buy bar soap in bulk, but the money you save often gets tossed when you stop using the scraps. Everyone does it. I got sick of throwing money in the trash and decided to start saving the scraps of bar soap. I melt them down once a quarter or so in a small saucepan and form a few new bars of 'mystery soap' that I then use just like normal soap. Beats ending up in a landfill. Here's how I did it.

Step 1: Collect the Soap

Save the soap scraps. I toss them into a drawer in my bathroom and wait until I have about 20 slivers of soap scraps. Personally, I use Ivory and Irish Spring, but you'll also find some Lava scraps in there too. Your preferences may vary, and you may want to separate them out if you're looking for consistency in the bars you make. Me, I don't really care.

Step 2: Break the Soap Slivers Into Small Chunks, Add Water

Break them into small pieces, about the size of a quarter, and then add about enough water to be visible at the level that the soap slivers are at. Turn on the burner to medium heat.

Step 3: Boil, Gently

Avoid boilovers, but simmer for a few minutes. The goal here is to get the water and the soap hot enough that they begin to stick together. They will, trust me. Stir often.

Step 4: Pour Into a Steel Colander

I put a frying pan underneath the colander so that the soap dribblings are captured and not wasted. Use a wooden spoon to push the soap mess around the colander so that the majority of the excess water is drained. You're trying to get a molten soapy glob, basically.

Step 5: Grease Two Small Glass Bowls

This makes it much easier to extract the soap 'bars' afterwards. Continue to let the soap mess cool and drain for a few minutes.

Step 6: Form Bars in the Bowls

Using a spoon, gather half the warm soap matter from the colander and stuff into a bowl. Repeat with other greased bowls as needed.  I dump the captured soap dribblings from the frying pan into one of the bowls that needs more soap matter - this one usually ends up being the 'fluffiest' soap. Clean up (this part takes the longest, in my experience), and place in the refrigerator overnight.

Step 7: Liberate the Soap From Bowls

Use a steak knife - slip it between the cooled soap matter and the glass bowl - it should pop right out with a little twisting. Use the recycled soap immediately or store it for the next time you (or mankind) runs out of soap.

Comments

[taberg503]

Thank you so much. This is so fun and easy to do. I had five years of soap scraps in a cubby in my bathroom and really wanted something random to do in the kitchen today. Not sure how the soap will smell. I added some musky essential oil. I filled a whole muffin pan with the scraps and leftover foam.

[andrabaker]

What did you use to grease the glass cups?
What is the double boiler method?

[ozzieBoy2]

Any suggestions on what I can do to make store-bought soap bars less caustic? We bought a case of Costco's Kirkland bath bars and the soap is so strong that no one in the family wants to use it. I still have twelve 4.5 oz. bars and don't want to waste them.

[EmilieL]

I use either Dove or Olay. No way I'd ever use the same soap men use.
Nothing caustic about Dove or Olay.

[19priceless50]

Look up Clean the World and donate it. Since it is a charity, you can probably take it off your income taxes.

[artisticlicents]

These too can be altered. You may end up with a great deal of expensive soap, but it should help. Mix half and half 100% raw shea butter (Amazon $12.99) with the soap. That should go a long way to take the harshness from the soap.

[DoItMyselfer8]

See if you can return them for a refund or at least a store credit.

[Itz Just Me]

If you can't find a way to donate them you can always return anything to Costco, they have satisfactiion guarantee! :)

[KeneeL]

Donate them! There must be someplace near you - shelter, charity, etc - that needs strong soap!

[MichaelT96]

I tried making the soap this way and my soap all melted down to a thick paste. I poured it into the molds and let them set overnight in the fridge. I thought they looked pretty good but when I showered with one of the bars it got kind of mushy in my hand. What did I do wrong? Should I follow my friends advice and add bees wax to it? Please help.

[tosseway]

The best mold is a Pringles can. Push the soap in the can and push the bubbles out and let it sit for a month. Then tear off the cardboard Pringles container and cut like slices of bread. You end up with hockey puck shaped soap.

[MelissaK]

You have to let it cure in a cool dark place for about 2 weeks so all the moisture comes out of i

[Muzhik]

See my above reply to Nolene.Lambert. By melting the soap, mixing, and letting it cool, you're making a type of "French Milled Soap". DON'T set it in the fridge. Let it cool overnight on the counter or in a closet. After you take it out of the mold, let it air dry for a couple of weeks in a cool dark place. This is curing the soap, but not in the way soap you make with fat and lye have to cure. In that case, you're waiting for all the lye to react with all the fat and make soap. In this case, you're waiting for all the water that got added during the melting phase to evaporate out.

You can get better results by using a double-boiler, or if you don't have one, put a smaller pot inside a larger pot. Fill the bottom pot with water, start heating, and make sure it doesn't boil dry. Put the soap pieces in the top pot with no more than a tablespoon or two of water. They don't need to be broken up but will melt faster if you do. Put the lid on the top part and wait, stirring the soap every once in a while. When all the soap is melted, turn off the heat and take off the lid to let the water evaporate out of the soap. After a few minutes, pour the soap into the molds and put in a cool dry space overnight to harden. Afterward, let it cure for a couple of weeks. You'll have homemade French Milled Soap, nice and hard that will last and last!

[DawnB135]

thank you muzhik for all your very helpful and lengthy descriptive instructions!! Your awesome!

[mah1949]

very helpful, thanks

[Rocksister]

My grandmother raised six children alone during the Depression. She saved EVERYTHING. For soap, she kept a sock for gathering slivers. Once there was enough, she tied a knot in the top of the sock and it was used. She was pretty smart!

[plwpble]

I usually grind the left over soap and add it to the laundry detergent.

[Megan J]

Can you add scented oils or olive oil at this stage?

[Annynna]

Try to put chipped pieces of soap into a stocking or fine net

[tonygoffe]

...NOW...if someone could just do an Instructable on "How to make a Soap Mold/Press" ..we'd be in Heaven !!!!!!! (with a Family Crest, of course !!!!! )