Tallow
Tallow, a rendered form of animal fat, might seem like a relic of the past, but its story is one of surprising versatility and enduring utility. From powering ancient lamps to frying modern French fries, and even fueling jet engines, this humble substance has shaped human civilization in countless ways. Join us as we uncover the fascinating journey of tallow—a material that's far more dynamic than you might imagine. Tallow is a pure animal fat, primarily from beef or mutton, rendered to remove impurities and boast an exceptionally high smoke point. Historically, tallow served as a foundational material for candles, soaps, and even critical lubricants for steam engines. Despite the rise of modern alternatives, tallow is experiencing a resurgence in culinary arts, sustainable fuels, and niche industrial applications.
AI Summary
Tallow, a rendered form of animal fat, might seem like a relic of the past, but its story is one of surprising versatility and enduring utility. From powering ancient lamps to frying modern French fries, and even fueling jet engines, this humble substance has shaped human civilization in countless ways. Join us as we uncover the fascinating journey of tallow—a material that's far more dynamic than you might imagine.
- Tallow is a pure animal fat, primarily from beef or mutton, rendered to remove impurities and boast an exceptionally high smoke point.
- Historically, tallow served as a foundational material for candles, soaps, and even critical lubricants for steam engines.
- Despite the rise of modern alternatives, tallow is experiencing a resurgence in culinary arts, sustainable fuels, and niche industrial applications.
What Exactly is Tallow?
At its heart, tallow is simply rendered animal fat—most commonly from cattle or sheep. The rendering process involves slowly heating the raw fat to melt it down, separating the pure fat from water, proteins, and other impurities. This purification gives tallow its stable, durable qualities.
While we often think of tallow as exclusively beef or mutton fat, in industrial settings, the definition is broader. It refers to any animal fat that meets specific technical standards, such as a particular melting point. This means commercial tallow can sometimes include fats from other animals, like pork lard, or even plant-based sources blended in.
After the fat is melted away during rendering, a solid, fibrous residue remains. These crunchy remnants are known as cracklings, or sometimes greaves. While often used as an ingredient in certain dishes for texture and flavor, they've also been a common and nutritious addition to animal feed, particularly for dogs.
The Chemistry of Clean
Before the age of synthetic detergents, tallow was a cornerstone of soap production. When tallow reacts with a strong base like sodium hydroxide—or lye—it undergoes a process called saponification. This chemical transformation turns fatty acids into soap, a fundamental cleaning agent.
The resulting substance is known as 'sodium tallowate,' a term still found on many soap labels today. It's essentially a mixture of sodium salts derived from tallow's fatty acids, primarily oleic and palmitic acid, which give the soap its cleansing and moisturizing properties.
Composition: Pure Fat, Pure Potential
Tallow is a pure fat, boasting an impressive profile of fatty acids. It's predominantly made up of monounsaturated fats, accounting for about 52%, and saturated fats, making up around 42%. Importantly, rendered tallow contains no water, protein, or carbohydrates—making it a highly stable and efficient energy source.
Culinary Comeback
For centuries, tallow was a kitchen staple. Its extremely high smoke point, around 480°F (249°C), makes it ideal for deep frying, producing incredibly crispy results without burning. It was the preferred cooking fat for many generations, used widely for shortening and even as a key ingredient in nutrient-dense foods like Native American pemmican.
Perhaps the most famous culinary application was in fast food. Until 1990, McDonald's cooked its iconic French fries in a blend of 93% beef tallow and 7% cottonseed oil. This gave their fries a distinctive, rich flavor that many still remember. Other major fast-food chains also relied on tallow for their frying needs.
Despite a shift towards vegetable oils in the late 20th century, tallow is now making a comeback. Chefs and health-conscious home cooks are rediscovering its superior flavor, stability, and nutritional benefits, seeing it as a traditional and wholesome cooking fat.
Fueling the Future
Beyond the kitchen, tallow has a surprising role in energy production. It can be converted into biodiesel, functioning much like plant-derived oils. This makes it a sustainable alternative fuel source, utilizing a byproduct that might otherwise go to waste.
In a remarkable demonstration of its potential, the United States Air Force successfully experimented with beef tallow in aviation biofuels. In 2010, a C-17 Globemaster III cargo plane completed multiple test flights using a 50/50 blend of conventional jet fuel and tallow-based biofuel, even flying entirely on the blend for one mission. This marked a significant step toward more sustainable military aviation.
Artistic and Industrial Applications
Tallow's unique properties also found a home in the art world. In traditional printmaking, it's combined with bitumen and applied to metal plates. This mixture acts as a resist, protecting certain areas from acid etching to create intricate designs for prints.
More recently, tallow stirred a global controversy when it was discovered as a trace additive in the polymer substrate of banknotes issued by 24 countries, including Canada, Australia, and the UK. This unexpected use sparked objections from vegans and various religious communities worldwide, highlighting the hidden pervasive nature of animal products.
Illumination and Industry
Before modern waxes became widespread, tallow was the primary material for candles. Tallow candles were a cheap and accessible source of light, especially for those who couldn't afford more refined options. The simplest form was a 'tallow dip'—a reed or cloth strip soaked in melted tallow, providing a flickering, economical glow.
Enduring Lubricant
One of tallow's most critical historical roles was as a lubricant, particularly for early steam engines. These powerful machines generated intense heat and steam, quickly washing away most oils. Tallow, however, proved remarkably resistant to this washing effect, making it indispensable for lubricating locomotive and steamship engines well into the 20th century.
Even today, tallow's robust lubricating properties are valued in heavy industry. It's still used in steel rolling, where it provides essential lubrication as vast sheets of steel are compressed through powerful rollers, enduring extreme pressures and temperatures.
For lighter engineering tasks, like cutting threads on electrical conduits, tallow remains a traditional and readily available lubricant. While specialized compounds exist, its effectiveness and low cost make it a practical choice for infrequent or basic workshop needs.
Perhaps one of its most infamous historical appearances was as a lubricant for rifle cartridges. In 1857, rumors that British Enfield rifle cartridges were greased with a mix of tallow (cow fat) and lard (pig fat) ignited the Indian Mutiny. Biting open these cartridges, a necessary step to load the rifle, deeply offended both Hindu sepoys (who revered cows) and Muslim sepoys (who considered pigs unclean), leading to widespread rebellion.
The legacy of tallow as an ammunition lubricant continues. Even in present-day black powder firearms, a blend often including mutton tallow, paraffin wax, and beeswax is used as a patch or projectile lubricant, demonstrating its enduring utility in specialized applications.
Textile Treatment
Finally, mutton tallow plays a vital, unsung role in textile manufacturing. In a process called 'sizing,' it's used as a starch, lubricant, and softener. Applying tallow gives yarns the necessary strength and lubrication to withstand the stresses of being woven on a loom, preventing breakage and ensuring smooth production.
Article
Tallow
Tallow made by rendering calf suet
Tallow is a rendered form of beef, pork, mutton suet, primarily made up of triglycerides.
In industry, tallow is not strictly defined as beef or mutton suet. In this context, tallow is animal fat that conforms to certain technical criteria, including its melting point.
Tallow consists mainly of triglycerides (fat), whose major constituents are derived from stearic and oleic acids.
The solid material remaining after rendering is called cracklings, greaves, or graves. It has been used mostly for animal food, such as dog food.
In the soap industry and among soap-making hobbyists, the name tallowate is used informally to refer to soaps made from tallow. This name comes from the chemical suffix "-ate" which signifies a negatively charged ion. Sodium tallowate, for example, is obtained by reacting tallow with sodium hydroxide (lye, caustic soda) or sodium carbonate (washing soda). It consists chiefly of a variable mixture of sodium salts of fatty acids, such as oleic and palmitic.
Dripping is the British term for beef fat that has been rendered; it can be used to make Cornish Pasties.
Composition
Tallow
Beef tallow is 100% fat, 50% of which is saturated fat, 42% as monounsaturated fat, and 4% as polyunsaturated fat (table). It contains no water, protein or carbohydrates. In a reference amount of 100 g (3.5 oz), it supplies 902 calories of food energy and 109 mg of cholesterol (table).
Palmitic acid and stearic acid are the main saturated fatty acids, while oleic acid is the principal monounsaturated fatty acid; it has a low content of polyunsaturated fatty acids (4% of total; details below and in table source).
• Saturated fatty acids: • Palmitic acid (C16:0): 25% • Stearic acid (C18:0): 19% • Myristic acid (C14:0): 4% • Lauric acid (C12:0): 1% • Monounsaturated fatty acids: • Oleic acid (C18-1, ω-9): 36% • Palmitoleic acid (C16:1): 4% • Eicosenoic acid (C20:1): 1% • Polyunsaturated fatty acids: • Linoleic acid: 3% • Linolenic acid: 1%
Uses
Tallow
An 1883 ad soliciting tallow from butchers and graziers for soap production in the Hawaii newspaper The Daily Bulletin
Tallow is used mainly in producing soap and animal feed.
Food
A significant use of tallow is for the production of shortening. It is also one of the main ingredients of the Native American food pemmican. With a smoke point of 480 °F (249 °C), tallow is traditionally used in deep frying and was preferred for this use until the rise in popularity of plant oils for frying. Before switching to vegetable oil with beef flavoring in 1990, McDonald's cooked its French fries in a mixture of 93% beef tallow and 7% cottonseed oil. According to a 1985 article in The New York Times, tallow was also used for frying at Burger King, Wendy's, Hardee's, Arby's, Dairy Queen, Popeyes, and Bob's Big Boy.
In the 2020s, influencers and Robert F. Kennedy Jr.—leader of the Make America Healthy Again (MAHA) movement—began to make unscientific claims about the negative health effects of seed oils and presumed health benefits of tallow over these oils. Kennedy has called upon Americans to "Make Frying Oil Tallow Again".
Greaves
Greaves (also graves) are similar to cracklings but not identical. They are the fibrous matter remaining from rendering of fat tissue, without the skin. They are used in some dishes, and they are also pressed into cakes and used for animal feed, especially for dogs and pigs, or as fish bait. In the past, the practice has been both favoured and shunned in dog food.
Biodiesel
Tallow can be used for the production of biodiesel in much the same way as oils from plants are currently used.
Aviation fuel
The United States Air Force has experimented successfully with the use of beef tallow in aviation biofuels. During five days of flight testing from August 23 to 27, 2010, at Edwards Air Force Base, California, a U.S. Air Force C-17 Globemaster III flew using JP-8 conventional jet fuel in three of its engines and a 50/50 blend of JP-8 and HRJ biofuel made from beef tallow in one engine on August 23, followed by a flight with the same 50/50 blend in all four engines on August 24. On August 27, it flew using a blend of 50% JP-8, 25% HRJ, and 25% coal-based fuel made through the Fischer–Tropsch process, becoming the first United States Department of Defense aircraft to fly on such a blend and the first aircraft to operate from Edwards using a fuel derived from beef tallow.
Printing
Tallow also has a use in printmaking, where it is combined with bitumen and applied to metal print plates to resist acid etching.
The use of trace amounts of tallow as an additive to the substrate used in polymer banknotes came to light in November 2016. Notes issued in 24 countries, including Canada, Australia, and the United Kingdom, were found to be affected, leading to objections from vegans and members of some religious communities.
Candles
A tallow candle
Tallow was once widely used to make molded candles before more convenient wax varieties became available and, for some time, they continued to be a cheaper alternative. For those too poor even to avail themselves of homemade, molded tallow candles, the "tallow dip," a reed that had been dipped in melted tallow or sometimes a strip of burning cloth in a saucer/cresset of tallow grease, was an accessible substitute. Such a candle was often simply called a "dip" or, because of its low cost, a "farthing dip" or "penny dip".
Lubrication
Early in the development of steam-driven piston engines, the hot vapors and liquids washed away most lubricants very quickly. It was soon found that tallow was quite resistant to this washing. Tallow and compounds including tallow were widely used to lubricate locomotive and steamship engines at least until the 1950s. (During World War II, the vast fleets of steam-powered ships exhausted the supply, leading to the large-scale planting of rapeseed because rapeseed oil also resisted the washing effect.) Tallow is still used in the steel rolling industry to provide the required lubrication as the sheet steel is compressed through the steel rollers.
Another industrial use is as a lubricant for certain types of light engineering work, such as cutting threads on electrical conduit. Specialist cutting compounds are available, but tallow is a traditional lubricant that is easily available for cheap and infrequent use.
The use of tallow or lard to lubricate rifles was the spark that started the Indian Mutiny of 1857. To load the new Pattern 1853 Enfield Rifle, the sepoys had to bite the cartridge open. It was believed that the paper cartridges that were standard issue with the rifle were greased with lard (pork fat), which was regarded as unclean by Muslims, or tallow (cow fat), which is incompatible with Hindu dietary laws. Tallow, along with beeswax, was also used in the lubricant for American Civil War ammunition used in the Springfield rifled musket. A combination of mutton tallow, paraffin wax, and beeswax is still used as a patch or projectile lubricant in present-day black powder arms.
Tallow is also used in traditional bell foundry, as a separation for the false bell when casting.
Industrial
Tallow can be used as flux for soldering lead.
Textiles
Mutton tallow is widely used as a starch, lubricant, and softener in textile manufacturing. Pretreatment processes in textiles include a process called sizing. In sizing, a chemical is necessary to provide the required strength to yarns mounted on the loom. Mutton tallow provides required strength and lubrication to the yarns.