Why Olive Oil Is Known as the King of Soap Making

Among all the plant oils used in soap making, one stands out for its history, gentleness, and reputation: olive oil. It is no coincidence that many soap makers around the world refer to it as the "King of Soap Making."

Used for centuries throughout the Mediterranean region, olive oil forms the foundation of some of the world's most famous traditional soaps and remains one of the most valued ingredients in modern handmade soap.

Olive oil, olive branches and handmade natural soap on linen fabric used in traditional soap making

A History Rooted in Tradition

Olive oil has been used in skincare and personal care for thousands of years. Ancient Egyptians, Greeks, and Romans valued its qualities and incorporated it into various cosmetic and cleansing products.

Later, it became the primary ingredient in the renowned Castile soap, which has been produced in Spain since the Middle Ages. Made entirely from olive oil, Castile soap is still regarded today as a symbol of purity, simplicity, and traditional craftsmanship.

Olive Oil in Soap Making: What Makes It So Special?

Gentle on the Skin

Olive oil is rich in oleic acid, a fatty acid that contributes to the mild and gentle nature of soap.

For this reason, soaps with a high percentage of olive oil are often preferred by those seeking a more delicate cleansing experience.

Creates a Long-Lasting Bar

Although olive oil does not produce as much lather as coconut oil, it creates a durable soap bar that continues to improve with proper curing.

Given enough curing time, olive oil soaps become exceptionally hard, long-lasting, and enjoyable to use.

A Distinctively Creamy Lather

The lather produced by olive oil soap differs from that of many other soaps. Instead of large bubbles, it creates a finer, creamier, and silkier lather.

This characteristic is one of the reasons why olive oil soap has remained popular for generations.

Olive Oil in Soap Making: A Unique Fatty Acid Profile

What truly sets olive oil apart is its fatty acid composition.

Olive oil typically contains between 55% and 83% oleic acid, making it one of the richest natural sources of this monounsaturated fatty acid. Oleic acid is largely responsible for the mildness, conditioning properties, and longevity of olive oil soap.

Unlike coconut oil, which is rich in lauric acid and produces abundant lather, olive oil creates a gentler soap with a finer, creamier foam.

Olive oil also contains smaller amounts of palmitic and linoleic acids. Palmitic acid contributes to hardness and stability, while linoleic acid helps balance the overall fatty acid profile.

This unique combination is one of the reasons why olive oil has remained a cornerstone of traditional soap making for centuries.

Why Isn't It Always Used Alone?

Despite its many advantages, olive oil also has some limitations.

Soap made entirely from olive oil requires a longer curing period and generally produces less lather than recipes that include coconut oil.

For this reason, many modern soap makers combine olive oil with other plant oils and butters.

For example:

• Coconut oil for cleansing power and abundant lather;

• Shea butter for additional creaminess;

• Cocoa butter for hardness and longevity;

• Castor oil for richer and more stable foam.

These combinations create balanced soaps that bring together the best qualities of each ingredient.

Olive Oil in Nivaria Soaps

At Nivaria, olive oil is one of the key ingredients in many of our recipes. It provides a reliable foundation that we carefully complement with other plant oils and butters depending on the character of each soap.

Our goal is not to rely on a single ingredient but to create well-balanced formulations that offer gentle cleansing, satisfying lather, durability, and a pleasant feel on the skin.

Why Is It Called the King of Soap Making?

Not because it is the only excellent oil for soap making.

Rather, few ingredients can match its long history, wide use, and enduring reputation among generations of soap makers.

Olive oil remains a symbol of tradition, quality, and natural care—qualities that continue to inspire handmade soap makers around the world today.