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Foaming syndet body bar with SCS
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Shower gel

Foaming syndet body bar with SCS

Indicative rinse-off body bar formula with SCS, SCI and a powder phase.

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Formula objective. A syndet body bar with Sodium Coco-Sulfate as the main foaming surfactant. The formula is intended for rinse-off body cleansing, with abundant foam and a compact solid format.

Why these ingredients were chosen.

  • Sodium Coco-Sulfate provides foam and detergency, driving the bar's cleansing action.
  • The co-surfactants and emollients soften the overall profile for body use.
  • The structuring agents provide hardness, resistance to wear and easier unmoulding.
  • The powder phase must be mixed carefully to avoid inhalation and concentrated spots.
  • pH control in dispersion allows verification that the bar remains within a reasonable range for skin.

Intended users. Rinse-off body use for people looking for a foaming solid bar. It is not intended for the face, intimate areas or compromised skin.

Skill level. Advanced level: combines handling surfactant powders, compaction and drying. Requires respiratory protection, precise weighing and pH validation.

Validation required. Validate pH, foam, hardness, wear, feel after rinsing, preservation during use and skin tolerance.

Base formula

Include Product % Quantity Price / pack size
Powders and surfactants
Microfiltered SCI
35 % 35 g Pack sizes are available, but they are currently out of stock.
SCS - Sodium Coco-Sulfate
12 % 12 g €0.50 used (1 x 50 g · purchase €2.10) Approx. leftover 38 g
Maize Starch
18 % 18 g €0.70 used (1 x 50 g · purchase €1.95) Approx. leftover 32 g
White Kaolin Clay
12 % 12 g €0.25 used (1 x 125 g · purchase €2.65) Approx. leftover 113 g
Melted phase
Cetyl Alcohol
6 % 6 g €0.27 used (1 x 50 g · purchase €2.25) Approx. leftover 44 g
Sweet Almond Oil
7 % 7 g €0.17 used (1 x 125 ml · purchase €2.95) Approx. leftover 118 ml
Liquid vegetable glycerine
4 % 4 g €0.09 used (1 x 125 g · purchase €2.90) Approx. leftover 121 g
Distilled or deionised water
5.2 % 5.2 g Manual addition
Geogard 221 / Cosgard
0.8 % 0.8 g €0.16 used (1 x 10 ml · purchase €2.05) Approx. leftover 9.2 ml

Step by step

Prepare and protect the workspace 1 Room temperature

Prepare and protect the workspace

Before weighing, prepare the worktop, mould, spatula and containers. With solid shampoos and syndets, it is best to have everything to hand because the mixture can change texture as you work.

Wear a mask, goggles and gloves. SCI, SLSA, SCS and other powdered surfactants can release particles when mixed, and you should avoid inhaling them.

Weigh the powders and mix them slowly. If the recipe contains clay or starch, sieve them to avoid lumps and achieve a more uniform bar.

Melt the fat phase and moisten the mixture 2 60-70 ºC to melt the cetyl alcohol

Melt the fat phase and moisten the mixture

Melt the cetyl alcohol with the oil in the recipe over gentle heat. There is no need to overheat: the aim is simply to melt the solid part so that it can be distributed evenly.

Then add the glycerine, water and liquid active ingredients, if any. Add this phase to the powders little by little, mixing patiently.

The mixture should turn from loose powder into a paste that can be pressed together. If it seems dry, wait a moment and keep kneading before adding more water; it often takes a little time to hydrate evenly.

Mould without rushing 3 Room temperature

Mould without rushing

Once the mixture is mouldable, transfer it to the mould in small portions and press firmly. It is better to compact it in layers than to fill the mould all at once and leave gaps inside.

With a body bar, compaction is important so that it does not break down too quickly in the shower.

Smooth the surface with the spatula or gloved fingers. If the mixture is too sticky, leave it to rest for a few minutes before handling it further.

Dry, measure the pH and validate Final

Dry, measure the pH and validate

Allow the bar to dry in a clean, ventilated place protected from moisture. Do not seal the product in an airtight container while it is still soft or damp.

When it is sufficiently hard, prepare a 10% dispersion: for example, 1 g of product in 9 g of water. Mix, wait a few minutes and measure the pH of this dispersion.

The target range for this recipe is 5,5 - 6,5. If the pH is outside this range, do not scale up the formula until it has been corrected.

Also validate foam, rinsing, hardness, wear, feel on the skin or hair, and preservation before making another large batch.

Preservation, shelf life and validation

  • Handle powdered surfactants with a mask, goggles and gloves. Avoid raising dust while weighing and mixing.
  • Measure the pH in an aqueous dispersion before validating the bar. Do not seal it in airtight packaging until the product is sufficiently hard and dry.

Questions, improvements and possible corrections

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