STP Foils
Foil School

Learn the craft of foil.

For printers, designers, packaging engineers and curious brand teams. Simple language, illustrated — hard-earned knowledge made visual.

The fundamentals

Three things make a perfect stamp: Die → Heat → Pressure.

Step 1

Die

An engraved metal die carries your artwork. Mounted to the press, it defines exactly where foil lands.

Step 2

Heat

The die heats to roughly 90–120°C, activating the heat-sensitive adhesive on the back of the foil.

Step 3

Pressure

The hot die presses the foil onto the surface. Heat + pressure together bond the metallic layer permanently.

Anatomy of a foil

What's inside.

A stamping foil is a stack of ultra-thin layers. Heat releases the decorative layers from their carrier and the adhesive bonds them to your substrate — leaving only the finish behind.

Layer 1
Polyester Carrier Film (PET)

Provides strength and stability during transfer.

Layer 2
Release Layer

Allows the decorative layers to separate from the carrier film when heat is applied.

Layer 3
Colour Lacquer Layer

Creates the visible foil color and finish.

Layer 4
Aluminium Metallization Layer

Provides metallic shine and reflectivity.

Layer 5
Heat-Activated Adhesive Layer

Bonds the foil to the substrate during stamping.

Transfer direction · foil to substrate
Substrate
Hot vs cold foil

Two processes, one premium finish.

Compare
Hot Foil
Cold Foil
Activation
Heat + die
UV adhesive
Best for
Sharp detail, premium finish
High-speed, fine detail inline
Speed
Moderate
Very fast
Tooling
Engraved die required
No heated die
Typical use
Packaging, cards, publishing
Labels, flexible packaging
Temperature reference

Dial in the heat.

Most hot stamping runs between 90°C and 140°C. Too cold and the foil won't release; too hot and it spreads or burns. The sweet spot depends on foil grade, substrate and dwell time.

80°C · too cold90–120°C · ideal150°C+ · too hot
Go deeper

The essentials, explained.

01

What is hot stamping foil?

A heat-transferable metallic or pigment layer applied to a substrate under pressure. Permanent, sharp, no ink involved.

02

Hot vs cold foil

Hot uses heat + die. Cold uses adhesive + UV. Hot is sharper, cold is faster — both have their place.

03

How foil stamping works

Die + Heat + Pressure. Get these three right and the finish follows on every job.

04

How to choose the right foil

Substrate first. Brand intent second. Finish third. We help printers and designers triangulate.

05

Common mistakes

Wrong temp, wrong dwell, wrong substrate. Most foil 'defects' are spec mismatches — fixable in a phone call.

06

Foil compatibility

Coated vs uncoated. UV-coated boards. Plastics. Leather. Each needs its own foil grade.

07

Troubleshooting & best practices

Common issues, dwell time, wrong substrate and on-press troubleshooting — practical fixes from people who run the floor.

08

FAQs

Reel widths, MOQs, custom colours, lead times — answered honestly by people who run the floor.