What is embossing?

Because it works by deforming the sheet rather than adding anything to it, embossing can be used entirely without ink. Blind embossing — a raised logo with no colour at all — is one of the most restrained and expensive-looking things you can do to a piece of paper, and it is a staple of professional-services stationery and premium packaging.

It can also be combined. Embossing registered to a printed area lifts that element off the page; combination emboss-and-foil, where the foil die and the embossing die work together, produces a raised metallic element and is about as premium as sheet finishing gets.

The design constraints come from the fact that paper can only stretch so far. Deep embossing on a small detail will tear the fibre; very fine lines lose definition because the paper cannot hold a sharp edge at that scale; and multi-level sculpted embossing needs a more expensive die. Heavier, softer, uncoated stocks emboss better than thin coated ones.

One practical consequence people forget: an emboss shows on the back of the sheet as a corresponding recess. On a folded card or a carton panel with a printed reverse, that matters, and it is the sort of thing to check on a sample rather than to reason about.