Embossing and perforation: used intentionally

Embossing, perforation, and kiss-cutting (cutting the top layer while keeping the base layer intact) are special cutting techniques that give packaging a highlight that flat printing cannot achieve. However, each additional cut adds a potential misalignment and a weak point in the structure. Sinh Vũ views these techniques as purposeful tools, not mere decorative elements.

Three different cuts for three different purposes

Before deciding which technique to use, you need to clearly distinguish between the three main types of cuts:

• Through cut: completely cuts through all layers of material, detaching details from the sheet. Used to create box shapes, open windows, or separate assembly details.
• Kiss-cut (top layer cut): only cuts through the top layer of material, leaving the base layer intact. Suitable for peel-off labels, removable stickers, or windows that can be peeled off at will.
• Perforation: create a series of evenly spaced cuts, with small bridges between the cuts keeping the sheet intact until the user tears it. This is a technique for creating convenient openings on packaging, food, or boxes with tear-off lids.

Choosing the wrong cutting style wastes the mold and fails to achieve the intended purpose. It’s essential to clarify: what will users do at that cutting point to know which style to choose.

When should you use, and when should you not

The overlap issue in cutting and printing

This is the most important technical point when using special die-cutting. The cut must align correctly with the graphics on the print. If misaligned, the edges of the box will reveal uncolored areas, the cut will not match the printed image, and the entire highlight will turn into an aesthetic flaw.

The specific tolerance level for overlapping depends on each workshop and equipment; you need to ask the workshop directly before finalizing the design. The only thing Sinh Vũ commits to is: always check the actual print sample before running the batch, not approving the mold solely based on the design file.

The more complex the cut, the better the die and sample checking are needed. Without a real sample, there is no basis for approval.

The principle of sample testing before production, Sinh Vũ.

Common errors and how to avoid them

• Cut misalignment compared to the print: Exposed white edges, cut shapes do not match printed shapes. Avoid this by requesting a physical sample and checking it visually before approving the production run.
• Too many holes weaken the box: boxes may be damaged during transport, especially if large openings are cut. Compensate by choosing thicker paper or adjusting the box structure.
• Cut the load-bearing area or close to the fold: the box is prone to tearing at that point after a few openings and closings. The cutting line should avoid areas where the box bears weight or bends.
• Using multiple cutting styles simultaneously: Visual clutter increases the number of templates and potential points of failure. Only use cutting styles that have a clear rationale.

Sinh Vũ's viewpoint

Sinh Vũ does not use die-cut shapes as mere decoration. Each special cut on a box must answer two questions: what does it provide for the person holding the box, and can the workshop execute it accurately enough?

When both questions have clear answers, the die-cutting becomes a true highlight: a perforated window showcasing the product inside, a convenient tear strip in the right place, or a raised detail that you can feel and remember. When there is no answer, it just adds extra cost and risk.

Final principle: the actual print sample must be checked and approved before running the batch. Without this step, all design decisions are assumptions.