Solid shampoo bars are becoming more and more popular due to the growing zero-waste movement
But did you know many shampoo bars on the market are actually cold-process soap bars and not true shampoo at all? Soap is completely unsuitable for the hair.
What is it that makes a solid shampoo bar different from a bar of soap? Soap is made from oil or butter and lye, in a process called saponification. This process results in a finished product that is great for cleansing the body, but has much too high a pH for the hair. Solid shampoo bars, on the other hand, have a lower pH and also contain surfactants, breaking up the trapped dirt and oils on the hair and scalp gently, so they can be washed away with water.
Here at Aurasoap we make a solid shampoo bar that is made with more gentle surfactants and ingredients permitted by the EcoCert and COSMOS organic/natural standards.
Solid shampoo bars are similar to a shampoo concentrate – they contain a high amount of surfactants (the cleansing ingredient) and very little water. This makes the manufacturing cost of a solid shampoo much higher than a liquid shampoo. But on the other hand, they last longer than quality liquid shampoos, much more cost effective.