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If you want to try making your own soap but are afraid to use lye, consider making a new bar of soap from leftover soap scraps. This is a great way to learn basic soap making techniques and experiment with additives like oatmeal and essential oils. With this method, you can also use soap scraps to make soap at home. This process is called manual grinding, and the finished product is called “recooked” or “handmade” soap.
Steps
Prepare basic ingredients
Choose soap. You can use whatever soap you like, but natural and unscented ingredients like pure castile soap are the best because then you’ll have plenty of options to make it to your liking. You should prepare 340 g of soap.
- Reheated soap will have a lumpy texture as it solidifies. It won’t be as smooth as regular soap bars.
- If you use leftover soap scraps, you should try to use soap with a similar scent, otherwise, the product you make may have an unpleasant smell.
- You can use different colors, but keep in mind that colors may not blend together to form a new color. Sometimes cooked soaps have speckled colors.
Grate or shred the soap. The easiest way to do this is with a grater, but you can also use a knife to scrape it off. The smaller the crumbs, the faster the soap will melt.
Place the soap in a double-layer steamer. Fill the pot with water to the level of 2.5 -5 cm. Place the heatproof bowl in the pot; Make sure the bottom of the bowl does not touch the bottom of the pot. Pour the chopped soap into the bowl.
- You can replace the steamer with a casserole dish if available.
- You can also melt the soap directly in the saucepan without the water bath, but be sure to cut it very small so the soap doesn’t burn. [1] X Research Source
Pour some water into the soap. You will need 250 ml of water for every 340 g of soap. [2] X Research Source This step will help soften the soap. However, do not add too much water, or the soap will not harden properly.
- For a unique soap, try using tea or milk instead of water. [3] X Research Source You can also use buttermilk or buttermilk.
- If using the cold soap making process, you may not need to add as much water if you use water. [4] X Research Sources
Start heating the soap, stirring every 5 minutes. Turn the heat to medium and wait for the water to boil. Every 5 minutes, use a wooden spoon or plastic spatula to stir it up once. Be sure to scrape the soap off the bottom and top of the bowl. [5] X Research Sources
- If using a casserole, cover the pot and turn the heat to high. [6] X Research Source Sometimes you still have to open the lid of the casserole and stir to keep it from burning.
- If you cook soap in a pot, you need to keep the heat low while cooking. [7] X Research Sources
Continue heating and stirring the soap until the soap is soft. Recooked soap will never melt completely like soap made from cast iron. It will turn into a lumpy, textured paste like oatmeal or mashed potatoes. Please be patient. This process may take 1-2 hours. [8] X Research Sources
- At some point, the soap will stop changing its texture. After boiling for a while and the soap is still in its original state, it will not melt anymore. [9] X Research Source You can move on to the next step.
- If the soap starts to scorch, turn off the heat and pour in some cold water. [10] X Research Source
Add additives
Wait for the soap to cool to 65-70°C. [11] X Research Source You don’t have to use any additives if you don’t like them, but they will give your soap a subtle extra touch. You also don’t need to take all the additives. Pick one or two (or three!) of your favorite ingredients!
Stir in a little aromatherapy or essential oil for fragrance. You should use about 15 ml of essential oil for every 350 g of soap. [12] X Research Source If the soap is already scented, you can skip this step or use a similar fragrance. For example, if the soap has a scent of lavender, you can add a drop of lavender essential oil when cooking again.
- You don’t need to use as much essential oil as aromatherapy, because essential oils are much more concentrated than aromatherapy.
- Do not use incense to make candles. This fragrance is not safe for the skin.
- Another option for scenting is to use spices. This is also a way to add color to soap. You can use 1-2 tablespoons (7.5 -15 g) of seasoning, such as cinnamon powder. [13] X Research Source
Add nourishing oils to make premium soaps. If you want a more luxurious finish, you can add a few drops of a nourishing oil, such as vitamin E oil, jojoba oil, almond oil, etc. Anything you want to put on your skin is perfect for into soap. However, do not abuse; Too much oil added can affect soap drying!
- Another skin-conditioning additive is honey. Not only brings a pleasant fragrance and provides moisture to the skin, honey also creates a beautiful golden color for soap. You can use ¼ – ½ cup (90-180 g) of honey. [14] X Research Source
Add a few drops of soap coloring to create color. Soap dyes are transparent, so this option is only for white soaps. You can buy soap coloring online or at art and craft stores. Add 1-2 drops of food coloring to the soap and stir well. Continue stirring until no streaks of color are visible. If the color is not strong enough, you can add 1 more drop.
- The color used to make soap is very concentrated. You should only add 1-2 drops at a time until the desired color is achieved.
- You must use soap coloring. Do not substitute with candle dyes, as these are not safe for the skin. Food coloring doesn’t work either
- You can add colorants to highlight the existing color of the soap. For example, you can deepen the light blue color of your soap with blue dye.
Add a bit of botanical ingredients to the soap’s texture and exfoliate. These ingredients are great for dull or dry skin. The exfoliator gently sloughs away dry skin, leaving you with soft, smooth skin. Sea salt, oatmeal, and dried lavender buds are great options. Here are the recommended amounts of ingredients per 340 g of soap: [15] X Research Source
- ¾ – 1 cup (90 – 120 g) of exfoliating ingredients like oatmeal, almond flour, coffee grounds, etc.
- 1 cup (50 g) of low-essential herbs such as chamomile, calendula, and lavender. You can use it fresh or dried.
- 1 – 2 tablespoons (1 – 2 g) of low-essential herbs such as rosemary. Can be used fresh or dried.
Pour soap
Mold preparation. Buy plastic soap molds. If you only have a plain mold but want a unique bar of soap, place a rubber soap seal on the bottom of the mold, with the picture side facing up. If you want, you can spray a thin layer of non-stick cooking oil or apply a little vaseline cream to the mold. [16] X Research Source
- You can buy soap molds and seals online and at craft and art supply stores.
- You can also use a silicone ice tray or a baking tray.
Ladle the soap into the mold. Because the soap is quite thick, you cannot pour it. Instead, use a wooden spoon or plastic spatula to scoop the soap into the mold. Use a spatula to smooth the surface of the soap.
Release the soap mold. Lift the soap mold about 15-30 cm above the tabletop and drop it down. This step helps the soap settle in the mold and removes air bubbles. [17] X Research Source You may need to do this a few times.
Wait for the soap to dry for 1-2 days before removing the mold. Once the soap has dried, carefully remove the soap from the mold. If you’re using a long rectangular mold, you can cut soap slices about 2.5cm thick. [18] X Research Sources
- If you are in a hurry, you can put the soap in the freezer for 1-2 hours before removing the mold. [19] X Research Source
Allow the soap to harden if necessary. Depending on the type of soap, the re-cooking soap may still be a bit soft and sticky. If so, put the soap on an iron rack and let it dry for 2-4 weeks. [20] X Research Source You can skip this step if using store-bought soap, but if using soap made with a hot or cold process, you may need to do this step.
- Some reheated soaps (usually those made from store-bought soap bars) only need about 2 days to dry. [21] X Research Source
Advice
- A very easy way to use up leftover soap scraps is to slit a sponge and stuff the soap shards in. When soaked in water, the sponge will absorb the soap, foam up and you can use the leftover soap.
- Another way is to soak the pieces of soap in water for a while until soft and pliable, then squeeze the pieces of soap between your hands until they stick together. Let the new soap “cake” dry for a bit until it hardens and you have soap to use.
- Reheated soaps always have a lumpy texture. It will never be as smooth as when following a cold, hot process or a soap made from a workpiece.
- Open a window or turn on an exhaust fan, especially when you’re cooking scented soaps.
- Some online stores sell “soap ingots.” These soaps often melt into a finer texture, similar to baking powder.
- Do not throw away excess soap. When using a new bar of soap, be sure to wet the old soap and apply it to the new bar. It will come out as soon as you wash it.
Things you need
- 340 g soap
- 250 ml of water
- Cheese grater
- Water proof steamer
- Soap mold
- Soap coloring, flavoring, etc. (optional)
- Herbs, spices, etc… (optional)
- Wooden spoon or plastic spatula
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This article is co-authored by a team of editors and trained researchers who confirm the accuracy and completeness of the article.
The wikiHow Content Management team carefully monitors the work of editors to ensure that every article is up to a high standard of quality.
This article has been viewed 16,751 times.
If you want to try making your own soap but are afraid to use lye, consider making a new bar of soap from leftover soap scraps. This is a great way to learn basic soap making techniques and experiment with additives like oatmeal and essential oils. With this method, you can also use soap scraps to make soap at home. This process is called manual grinding, and the finished product is called “recooked” or “handmade” soap.
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