What Is Cold-Process Soap?

If you’ve ever wondered what makes a handcrafted bar of soap different from an ordinary store-bought bar, the answer often starts with how it is made.

Cold-process soap is created using a traditional soapmaking method that combines natural oils and butters with a lye solution. Through a process called saponification, these ingredients transform into soap, creating a solid bar that cleanses while retaining the naturally produced glycerin.

At Floriane, our soaps are handcrafted in small batches using the cold-process method, allowing us to carefully select every ingredient that goes into each bar.

How Is Cold-Process Soap Made?

Cold-process soapmaking begins by combining oils and butters — such as olive oil, coconut oil, shea butter and mango butter — with a carefully measured solution of sodium hydroxide (lye) and water.

When these ingredients are blended together, a chemical reaction called saponification begins. The oils and lye react and transform into soap and naturally occurring glycerin.

Despite the name, cold-process soap isn't necessarily made completely “cold.” Some ingredients may be gently warmed to melt solid butters and oils, but the soap itself isn't cooked for an extended period.

Once blended, the soap mixture is poured into moulds, where it begins to harden.

After around 24–48 hours, the soap can usually be removed from its mould and cut into individual bars.

But it isn't ready just yet.

Why Does Cold-Process Soap Need to Cure?

One of the most important parts of traditional soapmaking is patience.

After being cut, cold-process soaps are left to cure for several weeks, typically around four to six weeks.

During this time, excess water gradually evaporates from the bars. This helps create a harder, longer-lasting soap with a better lather.

The slow curing process is one of the reasons handcrafted cold-process soap takes considerably longer to produce than many mass-manufactured cleansing products.

What Happens to the Lye?

The word “lye” can sound intimidating, but it plays an essential role in traditional soapmaking.

You cannot make true soap from oils alone.

When the recipe is formulated correctly, the sodium hydroxide reacts with the oils during saponification. It is this chemical reaction that transforms the original ingredients into soap.

The finished bar is therefore very different from the mixture of oils and lye used at the beginning of the process.

Naturally Occurring Glycerin

Another characteristic of cold-process soap is glycerin.

Glycerin is naturally created during saponification and acts as a humectant, meaning it helps attract and retain moisture.

In handcrafted cold-process soap, this naturally occurring glycerin remains within the finished bar.

Combined with carefully selected plant oils and butters, it contributes to the distinctive feel of a traditional handmade soap.

Why Make Soap in Small Batches?

Small-batch soapmaking gives us greater control over each stage of the process.

From measuring our oils and butters to blending, pouring, cutting and curing, every batch receives individual attention.

It also gives us the freedom to work with ingredients we love, including botanical oils, plant butters, clays and pure essential oils, creating bars with their own colours, aromas and character.

Because handcrafted soap naturally varies slightly from batch to batch, no two bars will ever be completely identical — and we think that's part of their beauty.

Cold-Process Soap vs Commercial Cleansing Bars

Not every bar sold in the soap aisle is made in the same way.

Traditional cold-process soap is produced through saponification, while some commercial cleansing bars are formulated primarily with synthetic detergents, surfactants and other ingredients designed to create particular cleansing, foaming or shelf-life characteristics.

Neither category can be understood simply from the word “natural” or “commercial”; the actual formulation matters.

What makes cold-process soap special is its simplicity and the traditional process behind it.

The Floriane Approach

At Floriane, we believe everyday products can be simple, beautiful and thoughtfully made.

Our cold-process soaps are handcrafted in small batches in South Africa, using carefully selected natural ingredients, nourishing botanical oils and pure essential oils.

Each batch is mixed, poured, cut and then given the time it needs to cure naturally.

It's a slower way of making soap — but that's exactly the point.

From carefully selected ingredients to the final bar, every Floriane soap is made with intention.