Alexei Volkov
Printing on plastic with an inkjet printer is a versatile process that can be used for a variety of applications, from promotional products to packaging and labelling. The process involves creating artwork using design software, which is then sent to the printer. To achieve the best results, it is important to select the right combination of hardware and ink, as well as consider the specific type of plastic being printed on. Inkjet printers offer high-quality, precise, and durable printing solutions, making them a popular choice for businesses and individuals alike. With the right tools and knowledge, printing on plastic with an inkjet printer can be a cost-effective and efficient way to create long-lasting prints.
| Characteristics | Values |
|---|---|
| Printing Process | Digital Inkjet, Screen, UV Litho, Handheld Thermal Inkjet, Pad Printing, Laser Printing |
| Printer Options | Epson Artisan 1430 Inkjet Printer, Bentsai Handheld Inkjet Printers, DuraCode Touchscreen |
| Ink Options | Solvent-based inks, UV-curing inks, Non-UV curing inks, STS Inks |
| Plastic Types | Polyethylene terephthalate (PET), High-Density Polyethylene (HDPE), Polyvinyl Chloride (PVC) |
| Pre-treatment | Chemical wipe, flame, corona, plasma treatment |
| Post-treatment | UV/LED light curing, air or heat drying |
| Applications | Gift cards, ID cards, loyalty cards, packaging, labeling, promotional products |
| Advantages | Quick turnaround, lower costs, customisability, portability, high resolution |
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What You'll Learn
Choosing the right printer and ink
When it comes to printing on plastic with an inkjet printer, there are several factors to consider when choosing the right printer and ink. Firstly, it's important to understand the different types of inkjet printing technologies available. The most common inkjet printing technologies include Digital Inkjet, Screen Printing, Handheld Thermal Inkjet, and Laser Printing. Each technology has its advantages and is suitable for specific applications and types of plastic materials.
Digital Inkjet printing, for example, offers high-quality images, quick turnaround times, lower costs, and customizability for small batches. This method involves preparing a digital file and printing the image with inkjet nozzles, resulting in a smudge-proof and water-resistant finish. On the other hand, Screen Printing involves transferring ink through a stencil onto plastic substrates and is ideal for applications that require durable and long-lasting prints.
Handheld Thermal Inkjet printers are portable and easy to use, offering high-resolution printing and relatively low maintenance. They are perfect for small-scale printing on plastic substrates, such as packaging and labeling. Laser Printing, on the other hand, uses a focused laser beam to heat and melt the plastic surface, creating precise and detailed prints. This method is environmentally friendly, reduces the risk of material damage, and is suitable for high-quality prints.
When choosing an inkjet printer for printing on plastic, it's essential to consider the specific requirements of your application. This includes factors such as the scale of your operations, the type of plastic you will be printing on, and the desired print quality. For instance, if you need a compact setup for detailed printing, a handheld inkjet printer might be the best option. However, if you require high-volume production, an industrial-scale printer would be more suitable.
In terms of ink selection, it's important to use ink that is compatible with plastic. Solvent-based inks, for instance, can adhere to plastics and provide a waterproof and scratch-proof print. However, they are typically used on large-format inkjets and may not be suitable for regular inkjet printers that use water-based inks. It's also worth noting that pre-treatment of the plastic surface may be necessary to ensure the ink adheres properly. This can include chemical pre-treatments, flame treatments, or corona treatments, depending on the specific plastic material.
Additionally, when choosing an inkjet printer for plastic printing, it's advisable to select a manufacturer known for quality and innovation. Reputable manufacturers often offer printers that are designed for ease of use, efficiency, and high-quality printing on plastic surfaces. They may also provide a range of hardware options to fit different operational needs, such as continuous inkjet printers for high-speed and uninterrupted marking applications.
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Artwork and design software
Adobe Illustrator:
Adobe Illustrator is a highly regarded software application for creating print-ready artwork. It offers a user-friendly interface and a range of advanced features. Illustrator excels in vector graphics creation, allowing designers to craft images that can be easily resized and manipulated without any loss in resolution or accuracy. This makes it ideal for printing, as images can be directly exported as vectors in print-ready files.
To create print-ready files in Illustrator, follow these steps:
- Open Adobe Illustrator and click on "Create New." Input the desired finished size and select the appropriate units.
- Set the bleed to 0.125" or 3mm, choose the CMYK colour mode, and set raster effects to "High (300 dpi)."
- The white area in the new document represents the finished part, while red lines indicate the bleed area. Place guidelines at least 0.125" or 3mm away from the trim line to indicate a safe area.
- Design your artwork, ensuring that all images are in CMYK mode and have a resolution of 300 dpi. Extend the background to the bleed area, and keep important content and text at least 0.125" (3mm) away from the trim lines.
- Once complete, click "Save" and choose "Adobe PDF" as the file type. In the popup window, select "High-Quality Print" and enable "Use Document Bleed Settings" under "Marks and Bleeds."
Adobe Photoshop:
Adobe Photoshop is another powerful tool for creating artwork for printing. While it may be more commonly associated with photo editing, Photoshop offers robust capabilities for designing print-ready graphics. It provides precise control over colour modes and resolutions, ensuring that your artwork is optimised for the chosen printing method.
- Open Adobe Photoshop and click on "Create New." Enter the desired dimensions, including bleed (e.g., for a 6x9 inch design, input 6.25x9.25 inches with 0.125 inches or 3mm bleed on each side).
- Set the resolution to 300, choose CMYK colour mode, and in the Advanced options, select the Japan Color 2001 Coated colour profile.
- Begin designing your artwork, ensuring that all images are in CMYK mode and have a resolution of 300 dpi. Extend the background to the bleed area, and keep important content and text at least 0.125 inches (3mm) away from the trim lines.
- Once your design is complete, click "Save" and select "Photoshop PDF" as the file type. In the popup window, choose "High-Quality Print," and in the output options, select "Don't Include Profile."
Alternative Software Options:
While Adobe Illustrator and Photoshop are industry standards, there are alternative software options available for creating artwork for printing. These include:
- Affinity Publisher: A capable graphic design application that allows users to create print-ready files, although specific instructions may vary from those provided for Illustrator and Photoshop.
- Adobe InDesign: A popular alternative to Adobe Illustrator, particularly suited for magazine and layout design.
- Various graphic design apps: Ranging from desktop publishing software to logo makers, these apps cater to different design needs and skill levels.
Considerations for Printing on Plastic:
When designing artwork intended for inkjet printing on plastic, there are a few key considerations:
- Ink Compatibility: Ensure you are using the appropriate ink for the plastic substrate. Regular water-based inks used in consumer inkjet printers will not adhere properly to plastic and are prone to smudging. Solvent-based inks are better suited for printing on plastic.
- Pre-treatment: Depending on the specific plastic substrate, you may need to apply a primer or another pre-treatment step to ensure proper ink adhesion.
- Printing Method: Inkjet printing on plastic can be achieved through various methods, including flat-bed printing, UV inkjet printing, screen printing, and thermal transfer printing. Each method has its advantages and considerations, so choosing the right one depends on your specific requirements.
In conclusion, by utilising software applications like Adobe Illustrator and Photoshop, designers can create high-quality artwork that is optimised for inkjet printing on plastic. Following the provided instructions will ensure that your designs are print-ready and will help achieve the desired results on the chosen plastic substrate.
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Pre-treatment methods
One common pre-treatment method is a chemical pre-treatment, which can take the form of a wipe that prepares the surface of the plastic. This is typically used for plastics that are not solvent-sensitive, such as PP, Nylon, and HDPE. For plastics that are solvent-sensitive, a different approach may be needed, such as a flame or corona treatment.
Another pre-treatment option is to use a primer, which can be applied as a wipe. This may be sufficient for simple promotional products or flat items that will not be washed frequently. However, for items that will be washed often, such as drinkware, an additional pre-treatment step may be necessary, such as flame, corona, or plasma treatment.
In some cases, no pre-treatment is needed due to the use of specialty inks, such as UV-curing inks or inks specifically formulated for certain types of plastic, like T2 UV ink for Tritan Plastic.
It's important to note that the choice of pre-treatment method can impact the printing process and the final quality of the printed product. Therefore, it's recommended to consult with an ink expert or supplier to determine the most suitable pre-treatment method for a specific plastic printing application.
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Printing methods
Printing on plastic with an inkjet printer is possible, but it requires the right combination of hardware and ink. The specific type of plastic you are printing on will also determine the best method.
Inkjet Printing
Inkjet printing is a versatile method that can be used for small-scale, detailed printing on plastic substrates, as well as high-volume production. It involves preparing a digital file and printing the image with inkjet nozzles. The ink is then dried to create a smudge-proof, water-resistant finish. This method is ideal for personalised items like gift cards, ID cards, and loyalty cards. It offers quick turnaround times, lower costs, and customisation for small batches.
Screen Printing
Screen printing involves transferring ink through a stencil onto plastic substrates. It is a cost-efficient method for large quantities and provides durable prints. This process includes preparing artwork, creating a stencil, preparing specialised ink, and printing the image.
Pad Printing
Pad printing is another option for printing on plastic. It requires creating a printing plate and using the right ink and machine. This method simply applies ink to a surface.
Laser Printing
Laser printing is an increasingly popular choice for plastic coding applications. It uses a focused laser beam to heat and melt the plastic surface, creating designs or images. This method is suitable for high-quality, precise, and detailed prints. It is environmentally friendly, with minimal waste, and reduces the risk of material damage due to its non-contact process.
Handheld Thermal Inkjet Printing
Handheld thermal inkjet printers are portable and easy to use, offering high-resolution printing and relatively low maintenance. They use heat to expel ink droplets onto the plastic surface. This method is ideal for small-scale printing on plastic substrates, including packaging and labelling.
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Curing and post-treatment
UV Curing:
Ultraviolet (UV) curing is a popular method for inkjet printing on plastic. It involves exposing the printed item to specific wavelengths of UV light, triggering a photoreactive process that cures and bonds the ink to the plastic. UV curing is known for its ability to quickly solidify the ink, resulting in high-quality, durable, and scratch-resistant prints. This method is particularly useful for certain ink formulations and printing applications. UV curing also offers excellent colour reproduction and print clarity, making it ideal for printing logos, graphics, or text on plastic containers.
Thermal Curing:
Thermal curing, also known as heat curing, involves placing the printed items in a constant temperature chamber. The items are exposed to far-infrared radiation or heated with hot air, initiating a thermal reaction that cures the ink. The temperature is typically controlled between 60°C to 100°C, and sometimes higher temperatures are used for better printing results. However, it's important to note that high-temperature treatment can lead to shrinkage and deformation of the plastic material.
Air Drying:
Some inks used in inkjet printing may require air drying as a curing method. This process involves allowing the ink to dry and cure naturally at room temperature. While this method may take longer than UV or thermal curing, it can still effectively solidify the ink on the plastic surface.
Post-Treatment Considerations:
After curing, there are additional post-treatment options to consider. These include surface coatings that can be applied to enhance the appearance and protection of the printed plastic. For example, a gloss coating can be added to impart a shiny finish and improve scratch resistance. Additionally, certain plastics may require pre-treatment or adhesion promoters to ensure proper ink adhesion during the printing process.
It is important to consult with ink experts and conduct adhesion testing to determine the most suitable curing method and any necessary post-treatments for your specific inkjet printing application on plastic.
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Frequently asked questions
The best printer depends on your specific needs, including the scale of your operations, the type of plastic you are printing on, and the desired print quality. Options include digital inkjet, screen, UV litho, and handheld thermal inkjet printers.
The process involves preparing a digital file, printing the image with inkjet nozzles, and drying the ink for a smudge-proof, water-resistant finish.
You will need to use solvent-based inks that can stick to plastics. These inks are typically used on large-format inkjets and will provide a waterproof and scratch-proof print.
UV inkjet printing is a direct-to-substrate process that uses UV light to cure the ink. This type of printing is often used for drinkware and promotional products.
Other methods include pad printing, screen printing, laser etching, and thermal transfer printing.
