Checklist for sending packaging print files to the printer

Sending packaging print files to the plant without a careful check is the most common cause of waste, wrong color, or type getting cut off. Below is a 7-step checklist that helps shop owners and design owners avoid expensive mistakes before they hit send — plus notes on when to self-check and when to hard-proof.

1. Check dimensions

Design file dimensions must match the chosen die exactly.

Example: a 120×120×80mm cake box → each panel on the file must match the corresponding size (front 120×120, side 120×80, etc.), not “close enough.”

• If artwork runs to the edge (bleed), add overrun per plant requirements (often ~3mm per side).

• The actual file can be larger than product size because of bleed — but trim size must still match the box/bag/label size.

• Switch box suppliers / cup sizes → re-measure; don’t reuse an “estimated” old file.

2. Image resolution at least 300 DPI

Screen images (72 DPI) look sharp but print soft or broken. Rules:

• Bitmap images (JPG, PNG): at least 300 DPI at actual print size.

• Vector logos (SVG, AI, PDF vector): don’t break when scaled — prefer when possible.

• Don’t stretch logos from Facebook/Zalo onto a large box.

Quick check: open the image in an editor → look at Image Size / Resolution at real print size. If you must enlarge a lot and DPI drops below the threshold, change the image source or use vector.

3. Convert color from RGB to CMYK

Screens use RGB; commercial presses work in CMYK (or a plant profile). RGB color is usually brighter → files that aren’t converted / don’t control expectations feel “dull” in print.

• Accept that some neon RGB colors cannot be reproduced on paper.

• Printaz automatically orients RGB → CMYK when exporting print files, but you should still preview color after conversion.

• Important brand colors: consider Pantone or hard-proof before bulk.

4. Outline fonts (convert text to paths)

If the file still has live text (not outlined), the plant machine may not have that font → text switches to a default font or layout jumps.

• Convert type to paths/outlines before sending, or embed fonts correctly per plant requirements.

• Printaz automatically outlines when exporting vector PDF.

• After outlining, re-check letter spacing and slogan lines — sometimes a light tweak is needed.

5. Safe zone ≥ 3mm from the edge

Important type and logos should not sit too close to the edge because:

• Small cutting error (~1–2mm) can clip type.

• Dies have tolerance; cut position is not always perfectly exact.

Practical rule: keep about 3–5mm minimum from type/logo to the cut line (trim line). Full-bleed color backgrounds can run to the edge — readable content cannot.

6. Preview in 3D / mockup before locking

A flat 2D design can look great, but once folded into a box you finally see:

• Type upside down or hard to read from the hand-hold angle.

• Logo covered by the lid when closed.

• Panel colors that don’t harmonize when placed side by side on a shelf / in a takeaway bag.

Printaz’s 3D feature lets you rotate the box and simulate open/close to check before print — reducing “pretty on file, off when held for real.”

7. Hard-proof for large jobs or first runs

The cost of proofing 1–2 samples is usually small vs scrapping a whole off-color / wrong-type run. Hard-proof when:

• Large orders (for example ≥ 500 pieces) — error cost is high.

• First packaging for a brand / changing paper substrate.

• Complex designs (many colors, many layers, special finishes).

Proof on the substrate that will run bulk if possible. Approve under shop lighting (not only under a computer lamp).

Quick tick summary

• File size matches the die + bleed.

• Bitmap images ≥ 300 DPI at real size; logos prefer vector.

• Color oriented to CMYK / plant profile; accept shift vs screen.

• Fonts outlined (or correctly embedded).

• Type/logos at a safe distance from the edge (~3–5mm).

• 3D / mockup preview before locking.

• Hard-proof if large or first run.

When to DIY the checklist, when to ask tech help

• Self-tick all 7 steps: text/price changes on a template that already has a die-line, medium/small jobs, you’ve printed the same size before.

• Ask a designer/plant: new box structure, old files missing bleed/die-line, tight color matching, many SKUs at once.

• Don’t: send a “close enough” file and ask the plant to guess — easy waste or a return.

FAQ

Is missing one checklist step a big deal? Missing bleed or wrong size is usually the most expensive (scrap the whole run). Missing outlined fonts usually gets the file returned. Skipping hard proof is a color risk — depends how brand-critical the color is.

Does a Canva PDF export pass the checklist? It can, if you set correct size, enough DPI, and also handle bleed/CMYK/outline per plant requirements (or use a print-ready export tool).

Can I send a screenshot over Zalo? No — that’s idea reference, not a print file.

Small tip: save this checklist as a sample message or internal note. Before each plant send, the owner just ticks — less reliance on “remembering by feel,” fewer post-print disputes.

Printaz in the plant-send workflow

On Printaz you pick templates by die-cut frame, edit in 2D, preview in 3D, then export files ready for the printer or place a print order. You should still tick the checklist above — the tool reduces manual steps; it doesn’t replace confirming size and content match the sales window.

This checklist applies to paper boxes, stickers/labels, paper bags, and many other packaging types (F&B, retail, fashion, gifts…). Need file advice before sending to the plant: [email protected] · printaz.vn.