Solid Shampoos: Some formulas

[Qui trovate la versione italiana di questo articolo]

More articles of the Solid shampoos series:

Here you will find all my experiments concerning solid shampoos.

Spoiler: the ones I prefer and I keep making are: 1.2; 3.0; and 4.0.

When I started making them, I took inspiration from the recipes I found on a German forum. However, those recipes were made with ONLY sodium cocoyl isethionate as surfactant. No secondary surfactants, no conditioners.

Later, I learned from American websites that – as for liquid shampoos – it is better to combine primary and secondary surfactants also in a solid shampoo. Which makes perfectly sense: a solid shampoo is just a “very concentrated version” of a liquid shampoo. Using just one anionic surfactant still makes it pretty aggressive.

Just to give you some useful sources of information about solid shampoos before you read my recipes:

Solid shampoo 1.0 – Nettle, Sidr and Neem

A (surfactants)%
Sodium Cocoyl Isethionate (SCI)32
Sodium Lauroyl Sulfoacetate (SLSA)16
Cocamidopropyl Betaine6
Coco Glucoside6
Citric acid (30% solution)1.5
B (fat stuff)%
Behentrimonium Chloride6
Cetyl Alcohol6
Cocoa Butter6
Coconut Oil4,5
C (preservative)%
Benzyl Alcohol/dehydroacetic acid1
D (powders)%
Nettle powder8
Neem powder2
Sidr powder5

Procedure. See the basic procedure for solid shampoos.

Solid shampoo 1.1 – Nettle and Sidr

A (surfactants)%
SCI28
SLSA18
CAPB8
DG8
Citric acid (30% solution)1
B (fat stuff + powders)%
Behentrimonium chloride6
Cetyl Alcohol6
Cocoa Butter6
Coconut Oil 4
Nettle powder7
Sidr powder8
C (preservative)%
Benzyl Alcohol/Dehydroacetic Acid1

Procedure: basic procedure for solid shampoos.

This time, the powders are mixed immediately with phase B: this makes it easier to incorporate them homogeneously in the shampoo.

I also changed a bit the ratio between the four surfactants, in particular increasing a bit the primary:secondary ratio.

Solid shampoo 1.2 – Nettle, Sidr and Neem again

I made this version in September 2020, when I started to make syndets without splitting the ingredients into two phases. I simply put all the ingredients to be melted together in the same beaker, then added the rest.

Phase A: to be heated%
SCI27
SLSA17
Cocamidopropyl betaine7,5
Coco glucoside7,5
Citric acid (30% solution)1
Behentrimonium chloride6
Cetyl alcohol6
Cocoa butter6
Coconut oil4
Nettle powder5
Neem powder5
Sidr5
Phase B: to be added when A is melted%
Neem oil3
Benzyl alcohol/dehydroacetic acid1

Solid shampoo 2.0 – White Clay and Zeolite

A (surfactants)%
SCI22
SLSA14
CAPB6
DG6
Citric acid (30% solution)1
B (fat stuff)%
Behentrimonium chloride6
Cetyl Alcohol6
Cocoa Butter4
Coconut Oil4
C (preservative)%
Benzyl Alcohol/Dehydroacetic Acid1
D (powders)%
White Clay 9
Zeolite9

Procedure: basic procedure for solid shampoos.

In this version, I used a lower percentage of surfactants. It still works but it is less cleansing than Shampoo 1.1.

Shampoo 2.1 – Charcoal

The recipe is exactly as Shampoo 2.0, but with the following Phase D:

D (powders)%
White Clay8
Zeolite8
Charcoal2

Solid shampoo 3.0 – The plain one

Yes, the basic one comes at the end.

This one does not contain any extra-powder (no clay, no herbs). Just surfactants and fat stuff.

A (surfactants)%
SCI35
SLSA 22
CAPB 10
DG10
Citric acid (30% solution)1
B (fat stuff)%
Behentrimonium chloride 6
Cetyl Alcohol6
Cocoa Butter6
Coconut Oil 4
C (preservative)%
Benzyl Alcohol/Dehydroacetic Acid1

Procedure: basic procedure for solid shampoos.

Solid Shampoo 3.1 – Basic one with neem oil

This one does not contain any extra-powder (no clay, no herbs). Just surfactants and fat stuff. In this new version I added some neem oil. The result is amazing on my hair, however the addition of extra liquid emollients makes the shampoo bar a bit softer.

A (surfactants)%
SCI31
SLSA 22
CAPB 10
DG10
Citric acid (30% solution)1
B (fat stuff)%
Behentrimonium chloride 6
Cetyl Alcohol6
Cocoa Butter6
Coconut Oil 4
C (preservative)%
Benzyl Alcohol/Dehydroacetic Acid1
Neem oil4

Procedure: basic procedure for solid shampoos.

Solid shampoo 4.0 – Alcanna and Kattha

In the picture above, the burgundy/violet syndets are shampoo 4.0 with alcanna and kattha; the green ones are shampoo 1.3 with neem, nettle and sidr above.

Phase A: to be melted%
SCI27
SLSA17
Cocamidopropyl betaine8
Coco glucoside8
Citric acid (30% solution)1
Behentrimonium chloride6
Cetyl alcohol6
Cocoa butter6
Coconut oil4
Alcanna powder7
Kattha powder8
Phase B: to add after A is melted%
Coffein 1
Inulin1
Benzyl alcohol/dehydroacetic acid1
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