Sublimate on Poly Mailers? Your Guide to Custom Packaging

In today’s fiercely competitive e-commerce landscape, your packaging is more than just a shipping container – it’s a powerful branding tool and a key element of the customer experience. This guide, “Sublimate on Poly Mailers: Your Guide to Custom Packaging,” is designed for you. Let’s read it to transform your shipping materials into powerful marketing tools!

1. Can You Sublimate on Poly Mailers?

1.1 Understanding Sublimation and Poly Mailer Materials

Sublimation printing is a unique process that transforms solid dye ink into a gas, which then penetrates and permanently bonds with polyester fibers at a high temperature. This results in vibrant, long-lasting prints that are part of the material itself rather than simply sitting on the surface.

The challenge with sublimating on poly mailers lies in the material they’re typically made from polyethylene (PE). This is a plastic that lacks the necessary molecular structure to accept and bond with the sublimated dye. 

Standard PE poly mailers won’t work because the ink will simply sit on the surface, resulting in poor color saturation, easily-rubbed-off prints and a generally disappointing result. The percentage of polyester in the coating will influence the quality of the final print, with higher percentages generally yielding better results.

Sublimation printing is a unique process that transforms solid dye ink into a gas
Sublimation printing is a unique process that transforms solid dye ink into a gas

1.2 Choosing the Right Poly Mailers for Sublimation

Successful sublimation requires selecting the correct poly mailers. Look for poly mailers specifically marketed as “sublimation blanks” or clearly identified as having a polyester coating. These are designed for this specific purpose and will provide the best results. White or very light-colored poly mailers are essential for accurate color representation. Darker colors will absorb and distort the sublimated dye, resulting in dull and muted prints. 

Successful sublimation requires selecting the correct poly mailers
Successful sublimation requires selecting the correct poly mailers

1.3 Step-by-Step Guide to Sublimating on Poly Mailers

  • Design Preparation: You can create your design using design software. Ensure your design is mirrored before printing. The resolution of your design will directly impact the print quality; use high-resolution images.
  • Printing: Print your mirrored design onto sublimation paper using sublimation ink. 
  • Prepare the Poly Mailer: Ensure your polyester-coated poly mailer is clean and free of wrinkles.
  • Heat Press Setup: Preheat your heat press to the manufacturer’s recommended temperature for sublimation on polyester (usually around 375-400°F). The precise temperature and pressure settings will depend on your specific heat press and the poly mailer’s material specifications, so consult the manufacturer’s instructions carefully.
  • Transfer: Place the sublimation paper (printed side down) onto the poly mailer. Cover with a Teflon sheet to prevent sticking and scorching.
  • Pressing: Apply the heat press according to the manufacturer’s guidelines (dwell time will vary based on material and equipment).
  • Cooling: Carefully remove the poly mailer from the heat press and let it cool completely before removing the sublimation paper.
  • Inspection: Inspect your poly mailer for any imperfections. Common issues include scorching (too high temperature or too long dwell time), ghosting (ink not fully transferring) and ink bleed-through (usually due to insufficient pressure).
You can create your design using design software
You can create your design using design software

2. Alternatives to Sublimation on Poly Mailers

2.1 Printing Methods for Poly Mailers

While sublimation offers vibrant, long-lasting prints, it’s not the only game in town for customizing poly mailers. Several other printing methods are suitable for standard polyethylene (PE) poly mailers, each with its own strengths and weaknesses:

  • Screen Printing: A time-tested method ideal for high-volume orders with simple, bold designs. A stencil is used to apply ink to the poly mailer, resulting in a durable, high-impact print. Screen printing excels in producing vibrant colors on a large scale but can be less cost-effective for small runs or complex designs. It’s a relatively eco-friendly choice when using water-based inks.
  • Digital Printing: Perfect for short runs and complex designs. Digital printing uses inkjet technology to print directly onto the poly mailer, allowing for full-color images and intricate details. It’s highly versatile and cost-effective for smaller orders but the print may not be as durable as screen printing. 
  • Flexographic Printing: A high-volume, cost-effective option for businesses needing thousands of custom poly mailers. This method uses flexible printing plates to transfer ink onto the poly mailer, ideal for repetitive designs and large-scale production. Flexographic printing delivers high-quality results at a low cost per unit but lacks the design flexibility of digital printing and may not be suitable for smaller orders.

Comparing the Methods:

Method Cost Quality Design Complexity Volume Eco-Friendliness
Screen Printing Medium High Low High Medium to High
Digital Printing Low (small runs) Medium (larger runs) Medium to High High Medium to High (depending on ink)
Flexographic Low (high volume) High Low Very High Medium (depending on ink and process)

2.2 Creative Packaging Solutions Beyond Sublimation

If sublimation isn’t feasible, there are several creative ways to customize your poly mailers and inject your brand personality into your packaging:

  • Stickers: A simple, affordable way to add a personalized touch. Custom stickers can showcase your logo, brand message or a fun design element.
  • Labels: Offer a more permanent solution than stickers. Explore different label materials like rubber labels, woven labels, and heat transfer labels.
  • Custom Inserts: Add a personalized touch with custom inserts like branded tissue paper, thank-you notes or promotional flyers.
  • Branded Tissue Paper: Elevate the unboxing experience by using tissue paper with your logo or a relevant design.
If sublimation isn't feasible, there are several creative ways to customize your poly mailers
If sublimation isn’t feasible, there are several creative ways to customize your poly mailers

3. FAQs about Sublimate on Poly Mailers

3.1 Where can I buy poly mailers suitable for sublimation?

For high-quality sublimation-ready poly mailers, we recommend checking out mypacklove.com. Other online retailers and packaging suppliers also offer sublimation-compatible poly mailers, but it’s crucial to carefully check product descriptions to ensure they are explicitly stated as suitable for sublimation and specify the type of coating. 

3.2 What design software is recommended for creating sublimation prints?

Popular design software options for creating sublimation prints include Adobe Photoshop and Adobe Illustrator. These programs offer extensive capabilities for creating high-quality, professional-looking designs.

3.3 Is sublimation on poly mailers environmentally friendly?

It is a dependency. Sublimation itself, while using less water than some other printing methods, still involves the production and use of inks and energy for the heat press. The poly mailers themselves contribute to plastic waste unless they are made from recycled or biodegradable materials. To lessen the environmental impact, consider using eco-friendly sublimation inks and exploring options such as biodegradable or recycled poly mailers.

Read more: Ship Poly Mailers USPS: Size, Weight, Cost & Best Practices

In conclusion, while sublimating directly onto standard poly mailers isn’t feasible, achieving beautifully customized mailer bags is entirely possible with the right approach. This guide has highlighted the importance of selecting polyester-coated poly mailers specifically designed for sublimation printing and meticulously following the heat press procedure. Let’s create packaging that leaves a lasting impression!

Poly Mailers

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