Latex gloves are made from natural rubber, a milky fluid called latex that’s harvested from the rubber tree (Hevea brasiliensis). This raw liquid is processed, mixed with chemical additives, and shaped into gloves through a multi-step manufacturing process. The final product is far more engineered than most people realize, with each layer of chemistry serving a specific purpose.
Natural Rubber Latex: The Base Material
The primary ingredient in latex gloves is natural rubber latex, a water-based suspension of tiny rubber particles collected by tapping the bark of rubber trees grown mainly in Southeast Asia. The latex itself is about 30 to 40 percent solid rubber content, with the rest being water and naturally occurring plant proteins, sugars, and lipids.
Those plant proteins matter more than you might expect. Researchers have identified at least 13 distinct proteins from the rubber tree that can trigger immune responses in humans. These proteins are what cause latex allergies, which range from mild skin irritation to severe anaphylactic reactions. The amount of residual protein left in a finished glove depends heavily on how thoroughly the gloves are washed during manufacturing.
Chemical Additives in the Mix
Raw latex on its own would make a weak, sticky glove that falls apart quickly. To turn it into something durable, manufacturers add a carefully balanced cocktail of chemicals before shaping the gloves.
The most important additive is sulfur, which drives a process called vulcanization. Sulfur creates chemical bridges between the long rubber molecules, transforming the soft latex into an elastic, tear-resistant material. To speed up this reaction, manufacturers add compounds known as accelerators. Two of the most common types are mercaptobenzothiazole and zinc dialkyldithiocarbamates. These accelerators are efficient, but they’re also a known cause of allergic contact dermatitis, the itchy, red skin reaction some glove wearers develop. This is a different type of allergy than the protein-based latex allergy: it’s a chemical sensitivity to these processing agents rather than to the rubber itself.
Beyond sulfur and accelerators, the formulation typically includes stabilizers to prevent the latex from breaking down during storage, antioxidants to resist degradation from light and heat, and pigments or dyes for color coding (the reason you see gloves in white, blue, or other colors).
How Latex Gloves Are Manufactured
The production process starts with ceramic or aluminum hand-shaped molds called formers. These formers are cleaned, heated, and dipped into a coagulant solution, usually calcium nitrate, which helps the latex cling evenly to the mold surface. The coated formers are then dipped into a tank of compounded latex, and a thin film of rubber adheres to the mold.
Next comes vulcanization. The coated formers pass through ovens where heat activates the sulfur and accelerators, cross-linking the rubber molecules into a strong, elastic film. Temperatures typically range from about 100 to 130 degrees Celsius, and the process takes several minutes.
After curing, the gloves go through a leaching stage: they’re soaked and rinsed in hot water tanks to wash away excess chemicals and, critically, to reduce the level of residual latex proteins on the surface. Longer and more thorough leaching produces gloves with lower protein content, which reduces the risk of allergic reactions. This step is one of the biggest quality differentiators between cheap gloves and medical-grade ones.
Finally, the gloves are stripped from the formers (often by jets of water or air), dried, and sorted for quality control before packaging.
Coatings and the Powder-Free Shift
For decades, most medical gloves were dusted with cornstarch powder on the inside to make them easier to pull on and off. The powder absorbed moisture and reduced friction against the skin. But the powder also picked up latex proteins from the glove surface and carried them into the air when the gloves were snapped on, increasing exposure and allergy risk for healthcare workers.
In December 2016, the FDA banned powdered surgical gloves, powdered patient examination gloves, and absorbable powder used to lubricate surgical gloves, determining that these products posed “an unreasonable and substantial risk of illness or injury.” The ban took effect in early 2017.
Today’s powder-free gloves use alternative methods to achieve that same easy-on, easy-off feel. The most common approach is chlorination, where the inner surface of the glove is treated with chlorine gas or a chlorine solution. This smooths and hardens the surface layer of rubber, reducing tackiness. Another method involves coating the inside with a thin polymer layer that acts as a lubricant without the airborne allergy risks of powder.
How Nitrile and Vinyl Gloves Differ
If you’ve ever reached for a blue disposable glove in a doctor’s office, there’s a good chance it was nitrile rather than latex. Nitrile gloves are made from synthetic rubber produced by combining two chemical building blocks (acrylonitrile and butadiene) in a process called polymerization. Because they contain no natural rubber, nitrile gloves carry none of the tree proteins responsible for latex allergies. They still go through vulcanization with accelerators, so chemical contact sensitivities remain possible, but the risk of the more dangerous protein-based allergy is eliminated.
Vinyl gloves, the least expensive option, are made from polyvinyl chloride (PVC) softened with plasticizers. They offer the weakest barrier protection and stretch the least, making them suitable for short-duration, low-risk tasks like food handling but not ideal for medical procedures.
Natural latex still holds advantages in certain situations. It offers superior elasticity, tactile sensitivity, and comfort for extended wear, which is why surgeons often prefer it. Nitrile has largely closed the gap on puncture resistance and chemical protection, making it the default in most clinical and industrial settings where allergy concerns outweigh latex’s comfort edge.
Why Material Choice Matters
The composition of a glove determines more than just how it feels on your hand. Natural latex provides excellent barrier protection against biological contaminants but breaks down when exposed to oils, petroleum-based products, and many organic solvents. Nitrile resists a much wider range of chemicals, which is why it’s the standard in laboratories and automotive work. Vinyl offers minimal chemical resistance and a looser fit.
For anyone with a known or suspected latex allergy, the distinction between glove materials is especially important. A true latex protein allergy means avoiding all natural rubber products, not just gloves. The chemical accelerator sensitivity, on the other hand, can occur with both latex and nitrile gloves since both use similar vulcanization agents. Accelerator-free gloves exist for people with this specific sensitivity, though they tend to cost more and are harder to find.