Coated Paper vs Bristol vs Grey Board: Which Board for Which Box?

When a customer asks "how much is the box," the board largely writes the answer. Whether a box of a given size is built as a wrapped rigid structure or a single sheet of bristol is what really separates the prices. This article compares the three core boards the way the trade actually uses them: coated paper, bristol and grey board. What each is for, and when each is the economical call.

What coated paper, bristol and grey board actually are

Coated paper has a filler-coated, thin, smooth surface. It is the surface that gives the most vivid print. But it is not stiff enough to stand on its own, so it is usually wrapped onto a body. Bristol is different. It is a single-ply board, smooth on both sides, at medium-to-high grammage. Above 300 gsm, bristol does the job alone, from a business card to a cosmetic carton.

Grey board serves another purpose entirely. It is thick, fairly cheap, with a grey back and a printable front. Nobody shows grey board directly; its job is to carry. The solid body inside a rigid box is almost always grey board.

What really sets the price: grammage or thickness?

Two terms get mixed up here. Grammage is weight per square metre, measured in gsm. Thickness is millimetres. In a folding carton, grammage drives cost, because material cost is the product of three variables:

In a rigid box, body thickness is the decider. The difference between 1.5 mm and 2 mm grey board is both felt and paid for. So "which board is cheaper" has no single answer; you have to ask whether the box is folding or rigid first.

Which board for which box?

In practice the choice usually comes down to this: does the product want a premium feel, or will it move fast off the shelf?

Notice coated paper is not on the list alone. Coated paper is a surface, not a body. Use it on a rigid box and cost gains both the paper and the wrapping labour. Skipping that distinction is one of the most common quoting mistakes: you think the material is cheap and forget the labour.

The quiet cost of the wrong board

Grammage above what you need is a silent loss. Building a box in 500 gsm when 400 would do means overpaying a quarter of the material on every order. The reverse is just as real: board too thin to hold up means crushed product and returns. The right approach is not the cheapest board but the lowest safe grammage the product truly needs.

If you also want to weigh flute and strength, the corrugated board types article helps. And to see the board choice on a concrete box, how to calculate carton box cost walks through it step by step.