When printing physical gift cards, vouchers, or festival passes, every single millimeter counts. If a designer overlooks bleed margins or embeds a low-resolution QR code, the end result is either an unsightly white border after guillotine cutting or tickets that handheld scanners fail to read.

In this guide, we'll explain how to properly configure print assets for standard A3 and A4 sheets and how automated duplex imposition works in QIKBOX.

1. The 300 DPI Golden Rule: Why Screenshots Don't Cut It

While digital phone and laptop screens operate around 72 to 144 DPI, commercial digital presses and offset printers demand 300 DPI (dots per inch) at a 1:1 reproduction scale.

If you paste a low-res web QR code (e.g., 150 × 150 pixels) into a print document, the RIP processor blurs the module edges. When printed, dark and light blocks bleed together, causing phone camera sensors to lose optical contrast.

How to ensure 100% scan reliability:

Export infinite vector (SVG): SVG files contain mathematical Bézier vectors rather than raster pixels, printing at the native resolution of the output plate engine (e.g. 2400 DPI).
Or use high-resolution PNG (at least 1024 × 1024 px): At a physical ticket size of 25 × 25 mm, this provides over 1000 DPI, giving immense leeway for any digital sheet press.

2. Bleed Margins and the Safe Zone

Paper sheets physically shift during printing and stack trimming. No commercial guillotine cutter cuts down to the sub-millimeter level.

That is why professional print shops always require:

2 to 3 mm Bleed: The background colors and artwork must extend 2–3 mm beyond the trimmed border on every side.
Crop Marks: Subtle 0.25 pt stroke indicators placed outside the trim area that guide the guillotine blade.
Safe Zone (minimum 3–5 mm): Key typography, logos, and especially the QR code must sit at least 4 mm away from the cutting line.

3. Reed-Solomon Error Correction: Always Pick Level H for Logos

QR codes are not simple bitmaps; they are 2D matrix arrays with built-in mathematical redundancy. If you center a logo or if a customer folds their voucher in their pocket, the Reed-Solomon algorithm reconstructs the missing modules.

Level M (~15% recovery): Optimal for plain QR codes without central branding.
Level H (~30% recovery): Mandatory whenever embedding a custom logo. Even if nearly a third of the central pattern is obscured, mobile scanners read the payload in 45 milliseconds.

4. Duplex Imposition in QIKBOX: Front and Back Paired Automatically

When manufacturing cards, you need a front face with eye-catching branding and a reverse face detailing terms of use and series numbering.

On an A3 sheet:

Front Sheet orders items left-to-right: [1, 2, 3, 4].
Back Sheet (flipped along the long edge) must mirror: [2, 1, 4, 3].

Without mirroring, back side #1 lands on front voucher #2.

The QIKBOX print cloud handles this automatically: upload your assets, specify your items per page, and generate production-ready PDFs with crop marks and perfectly aligned duplex pairs.