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Custom Printed Poly Bags: Part Numbers, Warnings, and Branding

Printing on the bag replaces a label your packers apply by hand, and puts required warnings on every bag. This post covers what to print, how print works on film, and nine steps from artwork to approved bags.

Every hand-applied label adds seconds to each bag and one more item to stock. Labels peel in cold storage and fall off in shipping. Printing the same information on the bag removes the label step.

 

What Manufacturers Print on Bags

  • Part numbers, product names, and instructions
  • A white block to write or stamp lot codes and dates
  • Suffocation warnings, required on many bags above a set size
  • Recycling codes and resin identification
  • Logo and company name

How Print Works on Polybags

Most poly bags print on flexographic presses with 1 to 4 spot colors. The film gets a surface treatment before printing so the ink sticks. Print on one side or both sides. Repeat length depends on the bag size.

The 9-Step Design Process

  1. Set the bag spec first. Size, style, mil thickness, and resin. Posts 6 and 7 cover these steps.
  2. List what goes on the bag. Required warnings, part data, and branding.
  3. Decide what stays variable. Information changing per batch, like lot codes, goes in a blank print box, filled by stamp, inkjet, or label.
  4. Choose film color. Clear shows the part. White or colored film makes ink stand out and hides contents.
  5. Choose ink colors. Fewer colors cost less. Dark ink on clear or white film reads best.
  6. Place the print. Keep print clear of seal areas, zippers, and hang holes. Ink in a seal area weakens the seal.
  7. Approve the proof. Check spelling, warning text size, barcode scans, and position on the bag.
  8. Test on your line. Fill and seal sample bags. Check for ink rub-off and seal strength.
  9. Inspect the first run. Compare color and placement to the approved proof before the full order ships.

What to Know Before you Order

  • Printed bags carry higher minimums than stock bags.
  • Plates are a one-time cost and stay on file for reorders.
  • Print adds lead time. Plan reorders with that in mind, or set up a stocking program.

Run the Numbers Yourself

Time a packer labeling 100 bags. Multiply the seconds saved per bag by annual bag volume and hourly wage. Add the cost of the labels and printer ribbons you no longer buy.

Ready to Start?

Send us your current bag and label.

We will spec the printed version and send a proof.

S&S Incorporated · Packaging made easy since 1965 21300 St. Clair Avenue, Cleveland, OH 44117 216-383-1880 · info@sspkg.com · www.sspackaging.com Monday–Friday, 7:00 AM–3:30 PM