Corrugated cereal boxes
Corrugated cereal boxes are made from fluted board, a wavy layer of paper sandwiched between two flat ones, instead of solid paperboard. The flutes make the box far stronger for its weight, which is what a pack needs once it is shipped singly, stacked on a pallet display or filled with several kilos. With fine micro-flute and a printed top sheet, it can look as good as a retail carton and survive a courier.
E flute cereal boxes for packs that have to travel.
A paperboard carton is designed to ride inside a shipping case. Take the case away, as happens with a single box sent to a customer or a pack sold from a pallet, and the carton takes the knocks directly. Corrugated board is built for that. The arched flutes act as a row of small columns and cushions, resisting crushing from above and impact from the side.
Fine flutes have narrowed the gap in appearance. E- and F-flute are thin enough to fold like a carton and smooth enough to carry high-quality print. For standard retail packs that travel in cases, paperboard is still lighter and cheaper; see cardboard cereal boxes.
Six parts of micro flute cereal cartons.
Select a point on the box, or read the list.
The flat sheet on the outside. Kraft for a natural look, white-top for print, or a pre-printed litho sheet.
Carton structures, redrawn for thicker board.
Most carton styles can be made in micro-flute: tuck tops, auto-lock bases, mailers with fold-over fronts. Allowances for board thickness are built into the dieline. For corrugated trays that go straight onto the shelf, see shelf-ready corrugated cereal trays.
Corrugated board, print and finish options
Choose an option to update the specification. Flute choice follows weight and journey; see the materials and printing page for the range.
Corrugated box specification
Where fluted board is the right choice
How a corrugated order runs
About corrugated cereal boxes
What a corrugated cereal box is
A corrugated cereal box is made from board with three layers: a flat outer liner, a fluted or wave-shaped middle sheet, and a flat inner liner, glued together. The fluting holds the liners apart, which is what gives the board its stiffness and cushioning at low weight.
Flutes come in sizes. For printed consumer packs the fine grades are used: E-flute, roughly a millimetre and a half thick, and the still finer F-flute. Heavier B- and C-flute are used for shipping cases and trays. Corrugated packs sit at the heavy-duty end of our custom cereal box range.
Best uses
Choose corrugated when the pack must protect itself. That covers cereal sold online and shipped in its own box, described under eCommerce cereal packaging; monthly subscription boxes; and the trays and large cartons of club store cereal packaging.
It is also the material for bulk size cereal boxes, where the fill is too heavy for paperboard. It is not the usual choice for a standard carton on a supermarket shelf: the walls are thicker, the box weighs more, and paperboard does that job well for less.
Structure and closures
Board thickness changes the drawing. Each fold consumes a little length, inner panels must be slightly smaller than outer ones, and tucks need more clearance. Corrugated also has more 'memory' than paperboard and tries to spring open, so closures use locking tabs, friction fits or tape instead of relying on a light tuck.
Common structures are tuck-top boxes with auto-lock bases, roll-end mailers with a front flap that tucks into the base, and open display trays. Tear strips are made with an applied tear tape, since perforations alone do not tear cleanly through flutes; see tear strip cereal boxes.
Material options
Two choices define the board: flute and liners. Finer flutes give a smoother print surface and a slimmer wall; coarser flutes give more cushioning and stacking strength. Liners can be brown kraft, white-top for printing, or a separately printed sheet. Liner weight is adjusted to the load.
Strength is specified by tests, such as edge crush for stacking and burst for puncture, not by thickness alone. We set the grade from the fill weight and the journey and confirm it with samples. Corrugated board commonly contains a high proportion of recycled fibre; content for a given board comes from the mill. See recycled cereal boxes.
Printing and finishing
There are three ways to print corrugated. Flexography prints directly onto the board in one or two colours and is the economical standard for shippers and trays. Digital printing prints directly in full colour with no plates, which suits short runs. Litho-lamination prints a sheet by offset and laminates it to the board, giving the same quality as a paperboard carton.
Direct printing can show a faint washboard pattern where the flutes sit under the liner; finer flutes and heavier liners reduce it. Finishes are simpler than on cartons: aqueous or UV coating, or film on a litho-laminated sheet. The inside can be printed as well; see inside printed cereal boxes.
Size considerations
Dimensions for corrugated boxes are given as inside measurements, because wall thickness makes the outside noticeably larger. Start with what must fit inside, add clearance, and the outside follows. For shipped packs, check the outside size against carrier bands before fixing it.
Stacking strength depends on the perimeter and height of the box as well as the board. Tall, narrow boxes are weaker in a stack than short, broad ones of the same board. Pallet fit matters for anything sold in volume. See cereal packaging for eCommerce for transit considerations.
Retail considerations
In stores, corrugated is mostly seen as trays, shelf-ready outers and pallet displays, where it carries the load and frames the product; see shelf-ready cereal packaging. As a consumer pack it appears in club stores and online.
The exposed flute edge reads as 'shipping box' to many shoppers. Where a more finished look is wanted, edges can be folded over so no flute shows, and a white-top or litho-laminated liner gives a carton-like surface. Corrugated is widely collected for recycling.
Artwork tips
Use our dieline, which includes thickness allowances. Keep 5mm safety from scores and edges, more than on paperboard, because registration on corrugated is looser. For flexo, use bold shapes and type, avoid fine detail and small reversed text, and limit the number of colours.
For litho-laminated work, artwork can be as detailed as on a carton. Allow space for shipping labels and handling marks on packs that travel alone. Our artwork preparation guide covers files. With contents and weight to hand, request a corrugated box quote.
Pack it, drop it, stack it: a plain corrugated sample.
We will make plain samples in your size and the flute we recommend, so you can load them with your product, send one through the post and see how it arrives.
Corrugated cereal boxes: common questions
Cereal boxes made from fluted board, with a wavy layer between two flat liners. They are stronger and more protective than paperboard cartons.
If the box travels alone, build it to arrive.
Tell us what goes inside, what it weighs and how it ships. We will specify the board, draw the box and send samples to test.