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L'inchiostro nero su carta bianca mostra una linea bianca a ogni taglio

This is the thing that disappoints people after the boxes arrive. Ink sits on the surface of a sheet; it does not soak through. So a heavy black flood on white stock gives you a black face and a white edge, and the two sit a millimeter apart where the guillotine passed.

On a folded card it is worse, because the score cracks the ink film and the white fiber underneath opens up along the spine like a hairline.

Dyed-through black stock has pigment in the pulp. Cut it anywhere and the cut is black.

Tutto ciò che è stampato sul nero è in foil, perché l'inchiostro vi scompare

Printing inks are translucent by design. They are made to be layered, with the white of the paper doing the work of brightness underneath. Put any ink on a black sheet and there is no white underneath — the color sinks in and reads as black on black.

So type and monograms on a black suite are made with metal and heat instead. Foil is a solid pigment film stamped onto the surface under pressure from a heated die. It sits on top of the black rather than trying to tint it. Gold, silver, copper, matte white, even a black foil that reads as gloss against a flat sheet.

Fustellature, rilievi a secco e fori vanno su una carta colorata in pasta

Once the black is in the fiber, you can cut into the sheet without exposing anything. A scalloped edge, an arch, a corner radius, a drilled hole for ribbon or a vellum wrap — all of it stays black at the freshly opened edge.

Debossing is the quiet one. A die presses down into the sheet with no foil and no ink, and you read the mark as a shadow in the surface. On black, shadow is the whole vocabulary. Monograms and crests come through as depth rather than contrast, and they change as the card tilts in someone's hand.