Aerosol cans are essential packaging solutions for industries like cosmetics, household chemicals, automotive products, and more. But before they’re filled with products, they start as raw materials transformed into precision-engineered containers. At Guangzhou Mijia Aerosol Can,we specialize in supplying high-quality empty aerosol cans for global manufacturers. Let’s explore how they’re made.  

1. Aerosol Can Material Selection: Tinplate VS Aluminum

Empty aerosol cans are typically made from:  

Tinplate(tin-coated steel): Strong, cost-effective, and widely used for industrial products.  

Aluminum:Lightweight, rust-resistant, and ideal for cosmetics, pharmaceuticals, and food-grade products.  

The choice depends on the product’s requirements (pressure resistance, corrosion resistance, weight, and cost).  

2. Aerosol Can Manufacturing Process

Step 1: Metal Sheet Cutting & Cup Formation 

- Large metal coils are cut into small discs.  

These discs are pressed into shallow cups using a mechanical or hydraulic press.  

Step 2: Deep Drawing – Shaping the Can Body

- The cups are stretched and thinned in multiple stages to form a seamless cylindrical can.  

This ensures no weak seams, critical for holding pressurized contents.  

Step 3: Wall Ironing (For Aluminum Cans)

- Aluminum cans undergo wall ironing to achieve uniform thickness.  

- Steel cans may skip this step, depending on design.  

Step 4: Washing & Drying

- The formed cans are cleaned to remove lubricants and metal residues.  

- Ensures a clean surface for coating and printing.  

Step 5: Necking & Flanging

- The top of the can is narrowed (necked) to fit the valve.  

- A flange is added to create a secure seal for the valve assembly.  

Step 6: Internal Coating (Lacquer Application)

- A protective epoxy or polymer lacquer is sprayed inside to prevent corrosion.  

- Critical for products like paints, chemicals, or food-grade aerosols.  

Step 7: External Printing & Decoration

- High-speed printing applies branding, labels, and safety warnings.  

- Options:Offset printing, UV printing, or shrink sleeves for premium designs.  

Step 8: Quality Testing

- Leak testing (pressure checks)  

- Dimensional accuracy (height, diameter, valve fit)  

- Coating integrity(to prevent rust or chemical reactions) 

Why Choose Guangzhou Mijia for Empty Aerosol Cans?  

✔ Global supplier with more than 10 years of experience in aerosol packaging  

✔ Custom sizes & designs(50ml to 1000ml+ cans)  

✔ Compliant with international standards(DOT, EU, REACH)  

✔ Sustainable options (recyclable materials, eco-friendly coatings)  

✔ OEM/ODM services (private labeling, custom shapes, and valve options)  

Applications of Our Empty Aerosol Cans

- Cosmetics:Hairsprays, deodorants, shaving foams  

- Household:Air fresheners, cleaning sprays, disinfectants  

- Automotive:Lubricants, brake cleaners, degreasers  

- Industrial:Paints, adhesives, coatings  

As we know that aerosol can includes external printing and internal coating, which are both of great significance to your products. But what are the functions of the internal coating? Let's go through this article to know about more.

1. Importance of internal coating: The main function of the internal coating of aerosol aluminum cans is to protect the internal surfaces from corrosion by aggressive chemicals contained in the filler. Besides, the internal coating also prevents direct contact between the filling and metal, thus extending the shelf life and ensuring the safety of the product.

2. Selection of internal coating materials: Materials of the internal coating is essential to ensure the safety and durability of aerosol cans. Commonly it includes epoxy, organic solvents, polyphthalamide phthalimide. And each of which has different advantages and limitation. For example, epoxy has good processability and chemical resistance while polyphthalamide phthalimide has particularly excellent chemical resistance.

3. Production process: The production process for aluminum aerosol cans consists of a number of steps, including the manufacture of the can body, the application of the internal coating, drying, and quality testing. The internal coating technology is the key link which usually uses an airless pump nozzle system to spray the coating onto the inner surface of the rotating can body, then goes to drying and curing.

4. Testing: The internal coating of aerosol cans is subjected to a series of performance tests to ensure its quality and safety. It includes appearance quality, dimensions, weld filler integrity, internal and external coating adhesion, external coating hardness, airtightness performance, deformation pressure and burst pressure testing.
5.  Market and technology trends: As the market develops and technology advances, the interior coating technologies of aerosol can are constantly developing. For example, water-based modified epoxy resin coatings are favored for their environmental performance. At the same time, market demands for lightweight and high-performance aerosol cans is also driving the development of related technologies.

All in all, ensuring the quality of the internal coatings can help improve the shelf life and safety of the aerosol cans. In MIJIA, various internal coatings are available for your aeroosl products. Tell us what you need, we do for you!

Global Aerosol Can Production

According to the statistical report of the European Aerosol Alliance (FEA), the total global aerosol can production in 2023 will exceed 15.5 billion cans, ranking first in the world in terms of production in Europe. The total production has slightly decreased compared to last year, reaching about 5.288 billion cans, with the UK, Germany, and France accounting for over 55% of all aerosol production in Europe. In addition, major aerosol producing countries such as Italy, the Netherlands, and Spain produced over 4 billion cans of aerosols in 2023.

The United States ranks second in the world in aerosol production, with a total production of approximately 3.752 billion cans. China ranks third in the world in terms of aerosol production. According to the latest statistics from the Aerosol Professional Committee of the China Packaging Federation, the annual production of aerosols in China will be approximately 2.475 billion cans in 2023. Brazil ranks fourth in the world in aerosol production, with a total production of approximately 1.202 billion cans, while Argentina ranks fifth with a total production of 864 million cans.

Proportion of European aerosol product types

Personal care and home care aerosol products account for over three-quarters of the total aerosol production in Europe. The proportion of personal care aerosol products reached 56.4%, while the proportion of home care products was 19.4%. Aerosol packaging containers are mainly made of iron and aluminum aerosols, while glass and plastic containers are still in a peripheral position.

Among personal care products, the production of deodorizers/antiperspirants accounts for the highest proportion, with a production of over 1.783 billion cans. Next is hair gel ➡ Hair mousse → Shaving mousse/gel.

Among household care products, air fresheners have the highest proportion, with a production of over 470 million cans. Next is insecticide/plant protection ➡ Care products (fabrics, furniture, leather, shoes, textiles, etc.) → Other products → Cleaning products.

Among the other categories of aerosol products, paint&varnish has the highest proportion, with a total production of about 324 million cans, followed closely by industrial and technical supplies with an annual production of about 284 million cans, food aerosols with a production of about 259 million cans, and automotive supplies with a production of about 182 million cans. The total amount of pharmaceutical and animal care products is approximately 109 million cans.

Aerosol cans are convenient for dispensing a variety of products, from paints and lubricants to cleaning agents and cosmetics. However, once they’re empty, many people simply throw them away. But did you know that some aerosol cans can be safely refilled and reused? Refilling can save money and reduce waste, but it must be done carefully to avoid hazards.



In this guide, we’ll walk you through the steps to safely refill an aerosol can.



Is It Safe to Refill an Aerosol Can?

Before attempting to refill an aerosol can, consider the following:

Check the can’s design – Some aerosol cans are designed for single use only and cannot be safely refilled. Look for refillable models or cans with a refill valve.

Use compatible products – Only refill with the same type of product (e.g., don’t mix paint with lubricant).

Work in a well-ventilated area – Aerosol propellants can be flammable or toxic.

Wear protective gear – Gloves and safety goggles are recommended.

If in doubt, consult the manufacturer’s guidelines.

Steps to Refill an Aerosol Can

Materials Needed:

Empty aerosol can (ensure it’s clean and depressurized)
Refill product (same type as original)
Aerosol can refill adapter (available online or at hardware stores)
Funnel (if needed)
Safety gloves & goggles

Step-by-Step Process:

1. Release All Pressure
- Shake the can to ensure it’s empty.
- Press the nozzle until no more gas or product comes out.

2. Remove the Nozzle
- Carefully pry off the plastic spray nozzle using a small flathead screwdriver.

3. Attach the Refill Adapter
- If using a refill adapter, connect it to the can’s valve stem.
- If refilling manually (without an adapter), use a small funnel to pour the liquid into the can.

4. Add the New Product
- Slowly transfer the new product into the can, leaving some space for propellant (if applicable).
- Avoid overfilling—leave about 20% empty to allow for pressure buildup.

5. Re-pressurize (If Needed)
- Some refillable aerosol cans require adding a new propellant (like compressed air or butane).
- Use a propellant charger if necessary, following safety instructions.

6. Reattach the Nozzle & Test
- Secure the nozzle back in place.
- Shake well and test-spray in a safe direction.

Safety Precautions
- Never puncture or weld an aerosol can – This can cause explosions.
- Avoid open flames– Propellants are often flammable.
- Dispose of damaged cans properly – Take them to a hazardous waste facility if unusable.

Refilling an aerosol can can be an eco-friendly and cost-effective solution, but it must be done with caution. Always prioritize safety and follow proper procedures. If you’re unsure, consider purchasing a refillable aerosol system instead.

Tin plated steel arrives in coils from the steelworks. Each one is about 4km long and a metre wide.

A colour printing press prints the can graphics directly onto the steel sheet before the sheet is slit and chopped to smaller sheets for bending into the can cylinders.

Welding the seam

The aerosol can welding process. Two copper electrodes roll alond the seen. A large electric current passes between the elctrodes and melts the two peices of steel together.

Welding the sheet edges together using electric current. Two electrodes press against the steel, one from outside and one from inside. The electrodes are connected to a power supply that drives a huge current of up to 5000 Amps through the metal. This melts the two overlapping layers together. This is called resistive welding. The current is pulsed at high frequency, one pulse for each spot or 'nugget' on the weld. To make a long seam the electrodes need to be wheels to roll along the can.

Making the perfect electrode wheel

For a perfect leak-proof welded seam the electrode wheels must also be perfect. After only one turn a copper wheel would pick up blobs of molten metal and be useless. The solution is to run copper wire round the wheels that is never re-used. The copper is recycled and made into new wire so the cost is reduced. 

The copper wire always presents  perfect new electrode surfaces as it is only used once. Getting the inner wheel into the inside of the can is not so easy as the can is moving in one direction. The trick is to curl the can into a cylinder just before it gets to the wheels.

There is a "nugget" for each pulse of current. The nuggets must just overlap. The slightest gap would cause a leak. Engineers regularly inspect the welds with a microscope.

A aerosol tin can approaches the wheels from the left. It has just been curved around the inner wire.

Hiding the seam

The seam on aerosol tin cans is a problem for can designers. The aerosol can is printed when it is flat sheet and then bent and welded. As ink is an insulator it must not cover the seam because it will stop the welding current from flowing though the tinplate sheet metal. This leaves an unprintable stripe on the can.

Engineers have managed to reduce the width of the stripe from 5mm to 1.5mm. Now that you have seen how the seam is made you can see that this is a big precision engineering achievement.

The final process is to add the aerosol can top (cone) and bottom (dome)