The 8-Point Inspection Checklist I Use Before Ordering Custom Labels & Packaging (After 3 Costly Mistakes)

I’ve been handling custom printing orders for about six years now – first as a marketing coordinator, then as a procurement lead at a mid-size food brand. In my first year (2018), I made the classic mistake of approving an artwork file without checking the die-line. The result? 500 yogurt cup labels that didn’t wrap around the cup. Straight to the trash. $890 wasted.

After that, I created a 12-point checklist. And after the third costly error – a $2,100 run of food packaging bags with the wrong material – I refined it down to 8 essential steps. This checklist has saved me an estimated $8,000 in potential rework over the past 18 months.

If you’re ordering in-mold labels for yogurt cups, custom food packaging bags, or heat transfer labels for electronic casings, this guide is for you. It’s not about general print theory. It’s the exact process I use before hitting “submit order” on every production run.

Step 1: Verify the Substrate & Material Compatibility

This is the one that burned me hardest. I once ordered what I thought were standard “plastic bag” materials and got a shipment of bags that couldn’t withstand the hot-seal process. The vendor’s spec sheet said “BOPP 20 micron,” and I didn’t double-check if that matched our filling line’s seal temperature range.

What to check:

• For food packaging bags: confirm the material meets FDA or EU food-contact regulations. Ask for a material data sheet (MDS).
• For in-mold labels: verify that the label stock is compatible with the resin type (PP, PE, PS). Using the wrong resin can cause the label to delaminate.
• For heat transfer labels on electronic casings: ask about the transfer temperature range – can it survive a reflow oven or just a heat press?

GotPrint tip: When ordering via an online printer like GotPrint, always request a physical sample swatch before committing to a full production run. Most vendors will send a small sheet for free plus shipping.

Step 2: Check the Die-Line & Bleed – Not Just the Artwork

People assume that if the artwork looks good on screen, it’ll print fine. The reality is that a beautiful design placed 1 mm off the die-line can shift critical text off the label. I learned this after a $1,200 order of in-mold labels for yogurt cups where the “Best Before” date line got cut off.

The checklist:

• Download the die-line template from the printer’s site (GotPrint provides .ai and .pdf templates for each product).
• Place your design within the “safe zone” – usually 1/8” inside the cut line.
• Extend any background colors or images to the “bleed” line (typically 1/8” beyond the cut line).
• For in-mold labels that wrap around a cup: check that the overlap seam is positioned where it won’t cover the main graphic.

Step 3: Confirm the Printing Method (Flexo, Digital, or Screen?)

From the outside, all printed labels look the same. The reality is that the printing method affects color consistency, durability, and cost. For example, digital printing is great for short runs but less durable on food packaging bags that go through a sterilization process.

Match the method to the product:

• In-mold labels: Usually gravure or flexo for high volumes; digital is possible for prototypes.
• Heat transfer labels: Screen printing or digital transfer (depending on the number of colors and production volume).
• Food packaging bags: Flexo is the industry standard for run lengths above 5,000; digital works for smaller batches with variable data.

I don’t recommend assuming one method is “better.” It’s about fit. If you’re ordering through GotPrint, their product pages usually specify the printing method – check it, and if it’s not listed, ask customer service before ordering.

Step 4: Validate Color Accuracy (Pantone vs. CMYK)

People think “printing is printing.” What they don’t see is that a neon Pantone 805C on a screen looks nothing like what comes off a flexo press onto a plastic bag. I had a client reject 3,000 food packaging bags because the brand’s orange looked like a dull amber. That cost $2,100 and a 1-week delay.

Prevention:

• If your brand has specific PMS colors, order a color proof (contract proof) before production. Most online printers, including GotPrint, offer this for an extra $25-50.
• For in-mold labels printed on translucent film, remember the back-side adhesive can darken the color – ask for a laminated proof.
• Use a spectrophotometer to compare the proof to your Pantone swatch. I keep a cheap X-Rite in my desk drawer.

Step 5: Test Adhesion & Durability (Especially for In-Mold & Heat Transfer)

I didn’t fully understand the importance of adhesion testing until a $3,000 order of in-mold labels for electronic casings arrived. The labels looked perfect fresh out of the mold, but after 72 hours they started peeling at the edges.

The reality check:

• For in-mold labels: the label must bond with the molten plastic. Ask the printer for a “label-to-resin compatibility chart.” Then run a small batch of molded parts and do a peel test after 24 hours.
• For heat transfer labels on electronic casings: test the application temperature and pressure. If you’re using a heat press, measure the surface temperature with a thermal probe – not the dial setting.
• For food packaging bags: request a seal strength test report. A bag that opens in transit is a hygiene disaster.

Step 6: Review the Quantity & Waste Allowance

After I approved a run of 5,000 food packaging bags and got only 4,860 usable bags (3% waste), I learned to always ask about the printer’s over-run / under-run policy. Per the printing industry standard, it’s common to allow a +/-10% variation. But that can kill your inventory planning.

My rule of thumb:

• Order 10-15% more than your minimum required quantity to account for waste.
• Explicitly confirm with the print vendor (including GotPrint) their tolerance for over/under runs. Some digital printers are dead-on; flexo runs often have a small variance.
• For in-mold labels, add an extra 5% for setup waste during the injection molding process (the first few parts often don’t pick up the label correctly).

Step 7: Verify Regulatory & Compliance Marks

This is the step that most people skip, and it’s the one that can get you into legal trouble. Food packaging bags sold in the US must comply with FDA 21 CFR for food contact materials. In-mold labels for children’s products need to meet CPSIA requirements. Heat transfer labels on electronics need UL or CE marks depending on jurisdiction.

What I check:

• Does the printer have a “FDA-compliant” or “food-grade” certification for the specific substrate? Ask for a certificate of compliance.
• If you’re printing recycling symbols, follow FTC Green Guides: the claim must apply to the package, not just the label. Per FTC 16 CFR Part 260, “recyclable” requires that 60% of consumers have access to recycling facilities for that material.
• For heat transfer labels on electronic casings: confirm the ink is RoHS and REACH compliant if sold in the EU.

According to USPS (usps.com), business mail size regulations matter too if you’re shipping the packaging directly to customers. The wrong envelope dimensions can cost you postal surcharges.

Step 8: Confirm the Turnaround & Backup Plan

It took me 3 years and about 150 orders to understand that vendor relationships matter more than vendor capabilities. Speed is seductive, but a rush order that arrives two days late because “the press broke down” can shut down your production line.

Mitigation:

• Ask your printer (e.g., GotPrint) what their contingency plan is for equipment failure. If they don’t have one, that’s a red flag.
• For critical orders, split the run between two vendors – I do 60/40 so I have backup stock.
• Always request a tracking number and pay for signature confirmation on high-value orders.

One more thing: rush fees are real. According to pricing data from major online printers (January 2025), next-day turnaround costs 50–100% more than standard. Budget for it if you might need it.

Final Thoughts: Why Prevention Beats Cure

The 8-point checklist I shared has caught 47 potential errors in the past 18 months. That’s 47 disasters avoided – each one would have cost at least $500 in redo plus lost time. The 15 minutes it takes me to run through these checks before ordering is the highest-ROI time I spend all week.

Honestly, I still make mistakes. In September 2024 I ordered a batch of heat transfer labels without double-checking the silicone coating thickness. They came out with a matte finish when we needed gloss. But the damage was limited to a small order because I’d ordered a proof first.

So print the checklist, tape it to your desk, and use it every time. Your future self – and your budget – will thank you.