Soaps
Properties of cold and warm boiled soaps
There are essentially two different manufacturing processes for soaps, which result in different properties.
Saponification, the chemical reaction used to produce soap, can be carried out either in a hot or warm process or in a cold process. The difference between hot and cold saponification is that in hot saponification the vegetable oils are heated. This speeds up the process. Hot saponified soaps are therefore generally more favourable.
From a cosmetic point of view, we believe that cold saponified soaps have the edge: as cold saponification does not heat the oils used and is therefore as gentle as possible. This means that all the properties of vegetable oils, butter, essential oils and other natural active ingredients are retained.
In higher quality, hot saponified soaps, essential oils and nourishing vegetable oils are added after the saponification process is complete. In this way, the components added at the end retain their mode of action.
The superfatting of a soap is the excess oil that remains in the soap when the saponification reaction is complete and soap making is finished. This technique is used specifically to prevent vegetable oils or animal fats, such as in goat's milk soap, from being converted into soap for skin care.
In the case of warm boiled soaps, nourishing oils are also added to the soap after the saponification process has been completed, which then take on a nourishing functio
Warm saponified soaps seem more economical than cold saponified soaps. A bar of soap from the hot boiling process of the same weight lasts about twice as long as a bar of soap that has been cold boiled.
There are many factors that can affect the hardness of a soap, including the specific oils and ingredients used. However, cold-boiled soaps are generally softer than hot-boiled soaps.
Regarding our soap holders, Aleppo soaps, olive oil soaps and donkey soaps have a very high hardness. Please follow our instructions for attaching the soap disc.
When travelling with soap, the soap is exposed to increased "stress". For example, if there is no soap dish in the hotel, it will not dry completely. In an ordinary soap box, in contrast to the traveller with a floating holder, the soap will rub off due to the movement when travelling in the box.
It may be worth considering choosing a harder, warm-soap for travelling.
Another consideration is the humidity of the country you are travelling to. We have found that cold-boiled soaps start to "sweat" in countries with high humidity, i.e. the oil from the over-greasing starts to leak out of the soap. This is not the case with warm boiled soaps.
Cold-boiled or cold-stirred soaps must be moulded. At home, wooden or silicone moulds are used. In the industrial sector, drawer-sized moulds are often used into which liquid soap is poured. After hardening, the soap is cut, which generally results in cuboid soap bars. Alternatively, silicone moulds with motifs are also used. The motif hole is filled and the soap is removed once it has hardened. A characteristic of cold-stirred soap is that there is always at least one flat side.
Hot-moulded or warm-moulded soaps can take on a specific shape, such as our cloud soap. It does not need a flat side. Strands are produced for this purpose, which are cut while still warm and given a contour using a mould. Alternatively, the cut pieces are stamped.
Hot-boiled soaps
In hot-boiled soaps, the oils and lye are heated, usually to around 120 °C. This accelerates the saponification process. This accelerates the saponification process, which is one reason why they are often cheaper. However, heating can impair the positive properties of the oils. For this reason, some manufacturers add essential oils after the saponification process. Hot saponified soaps are often harder in consistency and have a longer shelf life.

Cold saponified soaps
Cold saponification, which is more of an artisanal process, takes place at ambient temperature or at the reaction temperature between the lye and oil. The properties of the ingredients such as vegetable oils, natural ingredients such as honey, plant milk or essential oils are more easily preserved, which in our view gives them the edge over hot saponified soaps from a cosmetic point of view. In terms of consistency, cold-boiled soaps tend to be softer and more delicate than hot-boiled soaps. Our soap holder is recommended.