Printing On Corrugated Plastic: A Step-By-Step Guide

how to print on corrugated plastic signs

Corrugated plastic signs are a cost-effective, durable, and lightweight option for outdoor messaging. They are commonly used for business promotions, events, elections, real estate, and more. When it comes to printing on corrugated plastic, there are several methods to consider, including inkjet printing, thermal transfer printing, sticker printing, screen printing, and vinyl printing. Each method has its advantages and suitability depending on the volume of signs required. For example, inkjet printing is simple and convenient for small batches, while thermal transfer printing is suitable for high-volume production. It is important to consider the size and placement of the signs to ensure visibility and determine the amount of information to be displayed, which will impact the size of the signs.

Characteristics Values
Printing methods Inkjet printing, Thermal transfer printing, Sticker printing, Screen printing, Vinyl printing, Direct-to-substrate printing, Flatbed UV printing
Materials Corrugated plastic board, Polypropylene (PP), Polyethylene (PE), Coroplast, Corflute, Correx, Vinyl
Advantages Lightweight, Economical, Practical, Foldable, Weather-resistant, Durable, Customizable, High-quality printing, Visibility, Easy to install
Applications Commodity packaging, Logistics transportation, Warehousing signs, Road signs, Elections, House rental signs, Business promotions, Events, Real estate, Safety & instructional signs, Directional signs, Retail signage, Grand openings
Considerations Signage size and placement, Amount of information, Printing equipment size and effect, Printing process, Artwork alignment, Print time, Vacuum bed or sticky mat, Ink thickness, Drying area, Custom shapes, Contour cutting, Standard and custom sizes

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Printing equipment and materials

Printing on corrugated plastic signs, also known as coroplast signs, corflute signs, or correx signs, can be done using various methods, including inkjet printing, thermal transfer printing, sticker printing, vinyl printing, and screen printing. The choice of method depends on factors such as the volume of signs to be printed, cost, and desired quality.

For small-batch production, inkjet printing is a simple and convenient option. It involves using an inkjet printer to spray patterns or text directly onto the corrugated plastic sign. This method offers flexibility in terms of signage size and placement, allowing for custom shapes and the display of varying amounts of information.

Thermal transfer printing is suitable for high-volume production and can achieve high-quality pattern printing. This method involves using thermal transfer equipment to print patterns or text onto a heat transfer film, which is then placed onto the coroplast printing and transferred via heat pressing.

Sticker printing is another option, where pre-printed label stickers are pasted onto blank corrugated plastic signs. This method is often used for commodity packaging, logistics transportation, and warehousing signs.

Vinyl printing is commonly used for real estate signs and involves cutting vinyl graphics to apply to the corrugated plastic. Screen printing is another option for vinyl application, but it can be time-consuming and may not be cost-effective for small batches.

Additionally, consider the printing equipment and materials required for each method. Inkjet printing requires an inkjet printer, thermal transfer printing needs thermal transfer equipment, and sticker printing uses label stickers. Vinyl printing may be done with a machine like the Epson Stylus Pro GS6000, while screen printing requires a screen printing machine and vinyl or silk.

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Artwork alignment

Understanding the Challenges:

Firstly, it's important to recognize that not all corrugated sign blanks are identical. Their edges may not always be perfectly even, which can affect alignment. Additionally, the position of the sign blank in the printer can impact the final output and the time required for printing.

Printing to the Edge:

When your design bleeds to the edge of the material, consider setting up your artwork so that two blanks can be printed side by side, with the bleed aligning between them. This technique can save time and ensure consistent results across multiple signs.

Printer Bed Considerations:

If your printer has a vacuum bed, it will be easier to secure the corrugated sign blanks in place. However, if your printer uses a sticky mat, you might need to get creative to avoid damaging the printed sign when removing it from the bed. A helpful tip is to place two pieces of paper on the sticky mat, centred on each half of the sign, before placing the sign blank on top.

Printing Against the Flute:

When printing on corrugated plastic, it's important to print against the flute (the recesses in the material). This ensures that the ink goes into the recess, creating a more durable print. However, be cautious not to use too much pressure, as this can cause the ink to spread.

Ink Thinning and Squeegee Technique:

To ensure optimal ink absorption and adhesion, thin your inks by 10-15% by weight. Additionally, use a harder durometer squeegee with consistent pressure, stroke, and angle during the printing process.

Size and Direction of Flutes:

When printing on corrugated plastic, consider the size and direction of the flutes. If you have specific requirements for the flute direction, be sure to communicate this to your printer or printing service. Additionally, keep in mind that there may be a small margin of error in the final size of the printed sign, so allow for some flexibility in your artwork placement.

By following these instructions and paying close attention to the alignment of your artwork, you can achieve precise and professional-looking results when printing on corrugated plastic signs.

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Sign blank positioning

When printing on corrugated plastic, the position of the sign blank can affect the time it takes to produce the output. For example, when printing 24" x 18" corrugated yard signs, turning the signs 180° so that the image is closer to the capping station can reduce print time. Moving the signs so that the corner closest to the capping station aligns with the top and side of the print area can also decrease print time.

To ensure efficient use of materials, it is important to consider the artwork alignment when setting up multiple signs on the printer bed. This is because the edges of corrugated sign blanks may not always be perfectly even. For instance, a 24" x 18" positioning box printed on a UV printer's bed may not perfectly align with a 24" x 18" piece of pre-cut corrugated sign material placed on top.

When printing on corrugated plastic, it is recommended to print against the flute so that the ink goes into the recess. This requires the use of a harder durometer squeegee with consistent pressure, stroke, and angle. To prevent the ink from spreading, excessive pressure should be avoided.

The size of the corrugated plastic sign should be determined by the amount of information to be displayed. If more information needs to be included, a larger sign size may be necessary. It is also important to consider the size limitations of corrugated plastic sheets when determining the sign size.

For printing on a flatbed UV printer, the position of the sign blank can impact the efficiency of the printing process. By optimising the placement of the sign blank on the printer bed, production time and labour costs can be reduced.

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Printing methods

Printing on corrugated plastic signs, also known as coroplast signs, corflute signs, or correx signs, can be done through various methods, each with its advantages and suitability for different volumes of production. Here is an overview of some common printing methods:

Inkjet Printing

Inkjet printing involves using an inkjet printer to spray patterns or text directly onto corrugated plastic signs. This method is straightforward and convenient, making it ideal for small-batch production. It is a simple process that can be done using a suitable inkjet printer and the desired patterns or text.

Thermal Transfer Printing

Thermal transfer printing is a two-step process. Firstly, patterns or text are printed onto a heat transfer film using thermal transfer equipment. Secondly, the film is placed onto the coroplast, and heat pressing is used to transfer the pattern or text onto the sign. This method produces high-quality prints and is suitable for high-volume production.

Sticker Printing

Sticker printing involves pasting pre-printed label stickers onto blank corrugated plastic signs. This method offers flexibility in design and can be used for various applications. Sticker printing is a quick and easy way to create custom signs without the need for specialised equipment.

Screen Printing

Screen printing, also known as silk screening, is a traditional method that involves creating a screen with the desired design and using it to apply ink directly to the corrugated plastic. While screen printing can be time-consuming and messy, it is a good option for simple spot colour jobs and can be more cost-effective than flatbed printing.

Flatbed Printing

Flatbed printing, including UV flatbed printing, is a popular method for producing full-colour customised yard signs and other applications. This method allows for direct-to-substrate printing, resulting in vibrant and sharp graphics. Flatbed printers can handle various sign sizes and are suitable for both small and large volumes, depending on the specific printer and setup.

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Sign placement

Placement Planning:

Before installing your corrugated plastic signs, carefully survey the intended location. Consider the viewing distance and angle of passersby or your target audience. Ensure the sign is placed at an optimal height and angle for clear visibility. Take into account any potential obstacles, such as trees, poles, or other signage, that might obstruct the line of sight.

Installation Options:

Corrugated plastic signs offer versatility in installation. They can be mounted on fences, posts, or stands. Hanging is also an option, and grommets can be placed in the corners of the sign to facilitate this. The number and placement of grommets will depend on how you intend to hang the sign. For example, you can use grommets in the top corners for a simple hanging setup or opt for all four corners for a more secure attachment.

Sign Orientation:

When placing your sign, consider the orientation of the artwork or text. Ensure that the sign is positioned correctly, especially if you have directional or orientation-specific content. If your sign has a preferred viewing direction, make sure it is installed in a way that aligns with the intended orientation.

Multiple Sign Placement:

If you are placing multiple signs together, consider the arrangement carefully. For example, if you are placing two signs side by side, you can save time and improve efficiency by printing them simultaneously on a larger sheet, with the artwork butted up against each other. This ensures a seamless look and can speed up production.

Environmental Considerations:

Corrugated plastic signs are known for their durability and weather resistance, making them suitable for outdoor use. However, it is important to avoid placing them in direct sunlight or leaving them in a hot environment, as this can cause the signs to bow or bend over time. If using outdoors, ensure the signs are securely installed to withstand various weather conditions.

By following these instructions and considering the specific requirements of your project, you can effectively place your corrugated plastic signs to maximize their impact and visibility.

Frequently asked questions

Corrugated plastic sign printing is a sign made of corrugated plastic board. PP corrugated board is a board made of plastic materials such as polypropylene (PP) or polyethylene (PE). It is lightweight, water-resistant, flame retardant, and suitable for both indoor and outdoor use.

There are three main methods of printing on corrugated plastic signs: inkjet printing, thermal transfer printing, and sticker printing. Inkjet printing involves using an inkjet printer to spray patterns or text directly on the signs. Thermal transfer printing involves printing patterns or text on a heat transfer film and then transferring it to the sign using heat pressing. Sticker printing involves pasting pre-printed label stickers on the blank corrugated plastic signs.

Corrugated plastic signs are lightweight, economical, practical, foldable, and environmentally friendly. They are also durable, weather-resistant, and highly customizable, making them suitable for a wide range of applications, including business promotions, events, real estate, elections, and safety signage.

The size of the corrugated plastic sign depends on the amount of information to be displayed and the size limit of the corrugated plastic sheets. If more information needs to be displayed, a larger size may be required. Standard sizes include 12" x 18", 18" x 24", 24" x 36", and 36" x 48". Custom sizes may also be available.

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