Make Liquid Soap At Home Without a Stick Blender (recipe building and tutorial)


We want to share with you how we make liquid soap that is hypoallergenic and fragrance-free. This gentle soap is perfect for doing dishes and hand-washing clothes. Unlike what you might think, the final product of a liquid soap is actually in paste form. This paste is then dissolved in water to create liquid soap. We will show you our entire process from calculating the recipe, to the steps of soapmaking from start to finish, to how we dissolve the soap paste to make liquid soap.

If you are new to soapmaking, please read our beginner’s guide to get started and reference the soap terms and definition list if you do not understand certain words.



Video Guide

open video on PeerTube

You can also watch it on Youtube.


Building the recipe

We recommend you to make your own soap recipes and then double check the recipes with Soapmaking Friend. Below is how we build our recipe for your reference.

Soap = Lye solution + Oil (this recipe will have no additives, e.g. fragrances, colourants, etc.)

For liquid soap making, potassium hydroxide (KOH) is used instead of sodium hydroxide.


Oil

We are using 300g of coconut oil. KOH saponification (SAP) value of coconut oil = 0.257


Lye

KOH we have has a purity of 90%.

Superfat – we will add 1% superfat in the form of a lye discount.

KOH needed in recipe:

oil x SAP value ÷ purity x (100% - superfat)
300g x 0.257 ÷ 90% x (100% - 99%) = 84.81g

Water

When we experimented, a ratio of 1.5 : 1 resulted in oil and lye separation at first and after mixing further the batter seized to become very hard chunk. It did relax into a workable paste after resting overnight. Therefore, we do not recommend you use such a low water : lye ratio for this 100% coconut oil liquid soap.

Water : lye ratio we will use is 3 : 1.

Water needed in recipe:

KOH x (water : lye ratio)
84.81g x (3 : 1) = 254.43g

Final recipe

Coconut oil = 300g

Potassium hydroxide (90% purity) = 84.81g

Water (we used soft tap water) = 254.43g


Detailed liquid soap recipe

Notes


Coconut Oil Liquid Soap (fragrance-free)

Materials


Tools

Steps
  1. Build your recipe and use Soapmkaing Friend to double check your math
  2. Prepare your workstation with all your tools, materials and safety gear
liquid soap workstation with tools and materials prepared
prepare liquid soap workstation
  1. Weigh out the exact amount of water into a lye safe container, set it aside
  2. Weigh out the exact amount of oil into a lye safe container, set it aside
  3. Put your safety gear on (make sure you are also wearing long sleeves)
  4. Weigh out the exact amount of KOH into an empty and dry lye safe container
  5. Slowly pour KOH into water (never the other way round), cover it with a lid to protect yourself from the fumes
  6. After KOH and fully dissolved, slowly pour lye solution into the oil and stir. At first, colour of oil will become creamier, and then the consistency will gradually turn thicker.
  7. After 30 minutes of hand stirring (it will take longer for bigger batches and if room temperature is low), the soap batter will reach a thick pancake batter like consistency and a white colour. This is a good place to stop stirring as the oils have fully emulsified with the lye.
liquid soap batter after 30 minutes of hand stirring
soap batter after 30 minutes of hand stirring
  1. Cover the container with foil and a towel, set it aside for at least 12 hours
  2. After 12 hours, it should now be a thick packs with a off white creamy colour
liquid soap becomes paste for after 12 hours of making
soap paste after 12 hours
  1. Transfer soap paste into an airtight container and leave it for 3 weeks until it becomes more translucent. This is important as we did not use heat in this video so the soap paste needs extra time to let excess lye settle and for its pH to drop to a more gentle level.
liquid soap becomes transluscent after 3 weeks
liquid soap paste after 3 weeks
  1. To clean up, leave containers that have come into contact with lye untouched for at least 24 hours. All excess lye will be neutralised by then, wash as normal.
Dilution

Let the soap paste dissolve in water overnight. It may appear cloudy at first, but the liquid will clear up (sequester) in a few days. However, if you used hard water to dissolve the soap paste, it may remain cloudy.

cloudy liquid soap right after dissolving
cloudy soap right after dissolving
clear liquid soap after a few days of sequestering
clear soap after a few days of sequestering

Download PDF version of liquid soap recipe (without images)

pdf download of liquid soap recipe

liquid soap tutorial post end thumbnail

Thank you for reading! We hope you learned something new!