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CheeYuen – A Leader in Painting Injection Molded Plastic

Whether it be automotive, household or electrical technology – almost all visible injection molded parts are painted for optical or functional reasons nowadays.

Painting injection molded plastic parts requires an in depth knowledge of the chemistry and characteristics of the various plastic materials. It also requires knowledge of the mold and all the variables involved in the plastic manufacturing process. Several factors, including the molding process, mold type, mold surface, and part surface preparation must be considered and understood to achieve long-lasting adhesion between paint and plastic.

The experts at CheeYuen have several decades of combined experience and fulfils the highest quality demands relating to this.

Examples of Painting Plastic Parts

Do not hesitate to contact us to know more about our know-how in China. We are ready to listen to assist you in your plastic painting project.

Appliances and Bathroom

ABS plating knob outer

ABS Plating Knob Outer

ABS plating bezel knob

Electroplatig Oven Bezel Cover

Knob outer with variants

Knob Outer with Variants

Painted bezel knob

Painted Bezel Knob


Automotive Gear Painted

Painted air vent

Painted Air Vent

Blue molded product

Blue Molded Part

Painted dashboard ring

Painted Dashboard Ring

Painting automobile gear

Auto Gear Painted

Painting gear knob

Painting Gear Knob

Spray Paint for Plastic: The Perfect Solution for All Your Plastic Painting Needs

Painting is a form of post-process for injection molding that adds colored coatings to injection molded plastic parts. In this activity, the finish is applied by spraying a color onto the surface finish of the plastic parts while they are still in a heated oven.

This can be done by either an airless or a manual spray gun. This is usually done with an airless or manual spray gun in a controlled environment to avoid overspray and part damage which can occur when paint begins to dry. Some painters apply heat to the plastic parts before painting them, which improves adhesion and improves through-film drying time.

So it is very important to find a good spray paint company .CheeYuen can provide you one-stop Service. Our main service is auto parts and trim spraying, Appliances spraying,and Bathroom products spraying. We use automatic robot spray painting to make sure the quality.

Japanese Anest Iwata Spay guns

Japanese Anest Iwata Spay Guns

UV painting room (4)

UV Painting Room

Painting control equipment

Painting Control Equipment

Painting workshop

Painting Workshop

Our Advantages


Our product is an exceptional solution for painting various types of plastic surfaces, Appliances,Bathrooms and Automotive items. Our formula is specifically designed to be long-lasting and resistant to wear and tear, ensuring that your customers’ newly painted surfaces remain vibrant and glossy for extended periods.

Paint Formula:

Our paint formula contains a high concentration of waterproof and UV-resistant substances to protect against discoloration and damage, ensuring the color remains fresh and bright under all weather conditions. Additionally, our innovative formula contains unique attributes that allow the paint to adhere seamlessly to plastic surfaces, ensuring the color is smooth and evenly distributed over the surface.

Our Spray Paint for Plastic comes with an easy-to-use spray nozzle that delivers an even, consistent layer of paint onto any surface, without the fear of drips or smudges. Our paint also dries quickly, allowing your customers to complete their projects within a minimal time frame.


Our product is created with the highest quality materials, ensuring that it is environmentally friendly and safe for both the user and the environment. We go above and beyond to ensure that our paint is free from harmful chemicals, making it ideal for those who care about the well-being of our planet.


Our Spray Paint for Plastic comes in a broad range of colors, allowing your customers to choose the perfect shade to match their specific needs. We have an array of vibrant and exciting colors, including bright yellow, ocean blue, ruby red, ice white, and royal purple, to name just a few.


Our product is produced in state of the art facilities, ensuring that every can of Spray Paint for Plastic is of the highest quality. We are committed to providing our customers with exceptional quality, and we guarantee satisfaction with every can!


Our Spray Paint for Plastic is easy to sell, and it fits perfectly into any product catalogue. The product is budget-friendly and provides a high markup for merchants. With a quick turnaround, merchants can expect to reap substantial profits with minimal overheads on this product.

Features and Benefits:

• Exceptional formula for plastic surfaces to provide long-lasting resilience and wear.

• Resistant to weather conditions such as rain, sun, and frost.

• Dries quickly and evenly for a smooth, glossy finish.

• Comes in a broad range of vibrant and exciting colors.

• Environmentally friendly and free from harmful chemicals.

• Easy-to-use spray nozzle for even coverage with minimal fuss.

People Also Asked:

Pros of Painting Injection Molded Parts

Color:The plastic parts painting process ensure uniform color throughout the manufacturing run. This means that the first piece made and the last piece ejected will look exactly the same, even if the color of the plastic resin varies over the course of molding. In many cases, it is less expensive to paint every piece than it is to dye the plastic resin to match the desired color

Cover Imperfections:Paint will cover most imperfections that result from the injection molding process. These imperfections can be caused by the mold itself or by the design geometry. Paint will also cover up inconsistencies in the resin. Plastic resins with glass and carbon fill will show fibers near the surface of the part.

Finish:The finish of a bare plastic injection molded part is determined by the chemical characteristics of the resin. Plastic resins have finishes varying from satin to semi gloss. Painting injection molded plastic with ensure the correct finish. Customers can chose from a dull matte finish all the way to high gloss.

Stain and Chemical Resistance:Painting injection molded plastic will help the finished part resist staining from environmental factors and contact with certain chemicals. The plastic painting process will protect and lengthen the life span of injection molded parts.

Easy Clean Up:Painted surfaces are much easer to clean than unpainted surfaces. As noted above, paint will protect the integrity of the part from staining and chemicals. The same paint will make clean up a breeze should the part become soiled.

Scratch and UV Resistance:Plastic injection molded parts can be used in a variety of environments. The harshest environment is typically exposure to the elements. Parts being used in an outdoor setting must be able to stand up to all weather conditions and anything that gets thrown at it, figuratively and literally. The plastic parts painting process will add an extra layer of protection, making parts better able to withstand physical abuse and long exposure to sunlight.

The Cons of Painting Injection Molded Parts

Extra Cost:Painting is a post-processing procedure and will cost extra. Skipping any post-processing will reduce cost, especially if you are happy with the color and texture of the bare plastic. Beyond the added cost, there are no other downsides to painting injection-molded parts. Painting plastic injection molded parts is an inexpensive and easy way to protect new parts.

Types of Plastic Painting Processes

There are several types of plastic painting processes to choose from. The process that will best fit your project will depend on how the part is used, where the part is used, and what environmental factors may impact the part.

Spray Painting:Spray painting is the simplest and most cost-effective painting process used to add color or character to plastic parts. Some paints are two-part and self-curing. Other plastic paints require UV curing to increase durability. An CheeYuen Project Manager can help you determine the best type of spray paint for your project.

Powder Coating:The powder coating process starts with a powdered plastic that is sprayed onto the parts. A UV light is then used to cure the paint and adhere it to the surface. The chemistry of both the powdered plastic and the plastic injection molded part must be taken into account. This is to ensure the powder will bond electrostatically to the plastic before the UV curing process. Powder coating can provide a tough, long-lasting finish on plastic injection molded parts.

Silk Screening:Silk screening is used when more than one color is desired. This painting process also provides a way to apply detailed designs, in multiple colors, onto the part. There are some limitations to where and how silk screening can be used. Silk screening requires a flat surface where the paint will be applied. The process involves making a screen — a thin plastic sheet with a screen. A negative of the design is printed on the screen. The screen is laid on the part, paint is applied to the screen, and the screen is then removed, leaving behind the design. A separate screen is required for each paint color.

Stamping:Stamping is simple, quick, and affordable painting process for adding color to plastic injection molded parts. A large, soft pad is created with a raised design that will pick up the paint, which is then applied it to the plastic part. The pad is dipped in paint and then placed on the part. Removing the pad leaves behind the desired design. Stamping is a versatile painting process that is more precise than spray painting and has more options for placement than silk screening.

In-Mold Painting :In-mold painting involves applying paint to the injection mold cavity before the plastic is injected, allowing for color transfer via a chemical bond during the injection molding process. In-mold painting creates exceptionally strong adhesion between the plastic and the paint. This is because the paint moves and flexes with the part. In-mold painted parts are more resistant to chipping, cracking, and flaking than those painted after injection molding.

As with all painting processes, in-mold painting requires the correct chemistry and procedures to obtain optimal results. Virtually any color can be achieved in gloss or satin. Textured surfaces that resemble wood or stone can also be created.

What’s Factors Will Affect the Surface During Painting Process?

Factor #1:Smooth and flat surface is necessary. In this way, no flow marks, scratches, pitting and bubbling are left on the surface of the product after oil injection.

Factor #2:Heat and humidity resistance. Constant temperature and humidity tests should be carried out before spraying to improve the appearance of the surface without too many pinholes and bubbles.

Factor #3:Dust-free enviroment is required. Liquid paint need thrugh air drying or baking. At this time, the surface is easy to absorb dust pariticles, which will affect the apperance of product.

Factor #4:Keep the temperature constant. Too high temperature, paint is easy to melt, forming flow marks; The temperature is too low, the paint will not dry easily.

The Glossness of Paint Types

According to the different requirements of glossness, the glossness of paint can be divided into three types as following:

Type 1: Gloss Painted Surface

Good reflective effect, high anti -luminosity, clean and clear surface bright

Type 2: Semi-matte Painted surface

Type 3: Matte Painted Surface

Low reflection rate, color and lustres is softer

Why paint the plastic parts?

Although factory plastics can be obtained in different colours and shades, there are several reasons for painting these parts:

Functional requirements

Painting of the plastic parts increases their weather resistance.

Although plastic does not rust like metals, they can be degraded after long periods of exposure to atmospheric agents (UV rays, humidity), chemical agents (fuels, oils, detergents) or mechanical agents (abrasion, scratching).

As a result, surface wear and/or gloss may occur.

Aesthetic requirements

Although colour loads with a high pigment concentration can be added during the manufacturing and moulding process of the plastic, due to the very characteristics of the material, this colour will not be able to reproduce the same gloss and shade as those of sheet metal parts.

That is why the finish colour must be applied in order to achieve the best colour reproduction and matching of plastic parts.

Furthermore, the finish paint makes it easier to conceal uneven finishes in some types of plastics, such as fibre-reinforced plastics.

How To Paint Over Chrome Plastic?

The first thing you need to do when painting chrome, is to clean the surface. Next, you have to sand the surface evenly and thoroughly to get rid of any bubbles and to remove any of the thin, clear rust that may have accumulated since chrome reacts with the oxygen that it is exposed to. If you leave this shiny layer on the item you are wanting to paint, it exposes your paint job to the possibility of peeling sooner rather than later.

If you are interested in this issue, please click How To Paint Over Chrome Plastic to read it in detail~.