Solid shampoo is an alternative to the traditional liquid kind, and comes in the form of a bar of soap. The ingredients are generally surfactants, active ingredients, substances with particular properties depending on the characteristics of the hair, and essential oils. It is very simple to use: you use it exactly like a bar of soap and, once you have created a lather, you use it like a traditional shampoo.
You just need to take care to always let it dry in the open air, perhaps on a soap dish with holes. The advantages of solid shampoo are that it lasts longer, has no plastic packaging and is more practical to take on trips, as there is no risk of the product spilling. However, it also has disadvantages: it must always be kept dry so as not to waste the product, and there is less choice than with traditional shampoos, so it is not suitable for those with particular needs.
Solid shampoo is often regarded as the green alternative to the traditional kind, precisely because of the lack of plastic packaging and its longer lifespan. However, this is not always the case, as we must also consider how it is produced, how much water and energy were used, how sustainable the ingredients are, and so on.
