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In this soap making video, I show you how I color handmade soap blue 100% naturally.
Indigo powder is an ancient natural dye that can produce shades of blue ranging from light blue to dark blue, depending on how much you use.
Indigo is derived from the leaves of the indigofera tinctoria plant.
In cold process soap making, indigo can be used to color soap by making an oil infusion, or by adding the indigo powder to the lye solution.
Adding the powder to the lye solution is easier, faster and produces a more vivid shade of blue in the final soap. To avoid speckles, the powder has to be completely incorporated into the soap batter and blended well.
When using indigo to color handmade soap blue, it is important to use light colored oils in your recipe. Using lots of yellow colored oils or fats, like extra virgin olive oil or cocoa butter, can affect the final color. Forcing the soap to go through gel phase will make the color more deep & vibrant.
With indigo, a little goes a long way. If you use too much powder, it will bleed from the final soap, color the lather blue and possibly stain fabrics that come into contact with the soap.
Buy indigo powder on amazon: amzn.to/3yJb1eb
I bought my indigo powder from www.wonkyweaver.com/, as recommended by the author of the blog post below.
I created this soap with some help from this blog post by lovely lovely greens: lovelygreens.com/indigo-soap-...
Indigo history facts source: blog.fabrics-store.com/2020/0...
I calculate my soap recipes with this lye calculator: soapee.com/calculator
Please wear proper safety equipment when making soap.
○ Cold process indigo soap recipe:
Total batch weight ~700 g
200 g olive oil (40%)
150 g coconut oil (30%)
125 g refined shea butter (25%)
25 g castor oil (5%)
70.8 g sodium hydroxide
120 g frozen distilled water
(37% lye concentration, 4% superfat)
¼ tsp indigo powder
10 ml fragrance or essential oil for a light scent (I used 'simply fresh' by gracefruit)
Cure the soap for 4-6 weeks before using on your skin.
Soap making equipment*
○ Safety glasses - amzn.to/3pP99gz
○ Gloves - amzn.to/3gjEViA
○ Braun multiquick stick blender (black colored version) - amzn.to/35h3GFO
○ Infrared thermometer - amzn.to/3fXLx6e
○ Digital scale - amzn.to/3zmJSOR
○ High precision scale - amzn.to/39YRc8t
○ Spatulas - amzn.to/3zo8DdB
○ Funnel pitchers for easy pouring - amzn.to/3aYb9h1
○ Silicone molds:
○ Single cavity mold - amzn.to/3cAEIW0
○ Silicone loaf mold - amzn.to/35gS05S
○ Small wooden soap mold with silicone lining - amzn.to/3pVdn6b
○ Cafe de savon wire cutter - item.rakuten.co.jp/cafe-de-sa...
○ Guide - item.rakuten.co.jp/cafe-de-sa...
○ Swiss star stainless steel vegetable peeler for beveling soaps - amzn.to/3ak4VHW
○ Mini mixer - amzn.to/35dvECc
Recommended reading:
○ amzn.to/3iIllh5
*amazon links are affiliate links. If you purchase a product through a link I have provided I receive a small commission, with no additional cost to you. Thank you for supporting my channel!