Printing Process Workflow (Sequencing Rules for Each Stage)

I. Hot Stamping (Gold/Silver) vs. UV Coating

Same position: Hot Stamping must comebefore UV. The hot stamping temperature (~130°C) will damage a cured UV layer, causing bubbling or peeling.

Different positions: The order is flexible, but the industry generally recommends hot stamping first, then UV. In reverse-UV processes, an adhesion test (3M tape pull test) is required after stamping to ensure the foil doesn't lift.

II. Hot Stamping vs. Embossing (Texture/Pattern Pressing)

General rule: Embossing first, then hot stamping. The embossed surface is uneven, making foil adhesion difficult — specialty stamping foil is required.

Per customer sample requirements: Hot stamping first, then embossing. This ensures good foil adhesion, but the high pressure of embossing may crack the foil layer. The metallic effect is retained but may show cracking or gloss variation.

Spot embossing aligned with hot stamping: Emboss first, then hot stamp.

III. Hot Stamping vs. Debossing/Relief Stamping (Convex Embossing)

Same position: Hot stamp first, then relief stamp. This is the industry standard — the foil layer is pressed into the raised shape along with the paper, creating a "3D hot stamp" effect.

Combined stamp-and-relief in one pass: Must stamp first, then relief stamp. In some cases, the order may be reversed based on actual production conditions.

IV. Hot Stamping vs. Lamination

Industry standard: Hot stamp first, then laminate. After lamination (especially matte or soft-touch film), the surface energy is low, making foil adhesion poor and prone to peeling.

Per customer sample: Laminate first, then hot stamp — this requires foil-compatible lamination film, which is more expensive and yields inferior results compared to stamping directly on paper.

Correction: The general rule should be "hot stamp first, then laminate — the lamination protects the foil layer."

V. Hot Stamping vs. Varnish / Gloss Lamination

General rule: Varnish or gloss laminate first, then hot stamp. The varnished surface is smoother, which aids foil adhesion.

Beauty & personal care products: Hot stamp first, then varnish. These products demand premium foil appearance; stamping first ensures adhesion, and the varnish provides protection.

VI. Hot Stamping vs. Mounting to Corrugated Board

Always: Hot stamp first, then mount. Mounting is a structural lamination process — all surface decoration must be completed beforehand.

VII. UV Coating vs. Relief Stamping

General rule: UV first, then relief stamp. However, cured UV coating is hard and brittle — relief Stamping Pressure may cause cracking or peeling.

Specialty UV (holographic,/sandblast, etc.) aligned with relief stamping: UV first, then relief stamp, with a minimum 1mm offset between the relief area and the UV edge.

Gloss UV can withstand relief stamping; other UV types are prone to peeling — gloss UV is relatively flexible, while specialty UVs are more brittle.

VIII. UV Coating vs. Embossing (Texture)

Always: Emboss first, then UV. Embossing requires significant physical pressure; if UV is applied first, the coating will crack and lose gloss.

IX. UV Coating vs. Mounting to Corrugated Board

Always: UV first, then mount. Mounting is a structural process; surface decoration comes first.

X. Relief Stamping vs. Mounting to Corrugated Board

General rule: Relief stamp first, then mount, using a 1.5mm-thick relief die.

If the relief area is more than 1.5cm from any crease line or die-cut line: Mount first, then relief stamp — but a 3.0mm-thick reinforced die is required.

XI. Combined Workflow: Hot Stamping + UV + Embossing + Relief Stamping

General sequence: Emboss → Hot Stamp → UV → Relief Stamp. This follows the principle of "large area → small area, high temperature → temperature-sensitive, flat → raised."

Spot embossing: The order is flexible.

XII. Relief Stamping vs. Die-Cutting

General rule: Relief stamp first, then die-cut. Relief stamping requires the full sheet to be flat and properly registered; after die-cutting, the sheets are separated into small pieces and difficult to align.

If the relief area is more than 1cm from any crease or die-cut line: Both operations can be performed simultaneously.

Summary: Universal Sequencing Principles

Mnemonic: Large → Small, Hot → Cold, Flat → Raised, Cut Last.