A regular slotted container, or RSC, is the familiar corrugated case with top and bottom flaps that meet at the center seam. The repeated panel layout makes the structure easy to specify, but the box still needs to be drawn around the packed product, not around a generic label. Give the supplier inside dimensions, product weight, orientation, flute, print coverage, closure, and shipping configuration. The result should be a case that fits the product and packs in the way the warehouse expects.
What makes a regular slotted container different from other shipping boxes?
The RSC folds from one body blank and closes over the opening with meeting flaps. A custom shipping box built this way is efficient to pack and seal, while a mailer changes the opening motion and usually carries more of the presentation on the lid. Compare custom shipping boxes with custom mailer boxes when the same product may be shipped or opened in two different ways. A rigid format such as rigid printed boxes holds its shape with chipboard, so it is a different choice from a folding corrugated case.
Which flute should I discuss for the product and shipment?
Flute is the corrugated wave inside the board, and its profile changes thickness, cushioning, fold behavior, and print surface. E flute has a fine profile and can suit compact printed cases. B flute gives a balanced case construction. C flute has more depth and is commonly considered when cushioning or stacking depth matters. 32 ECT is a common edge-crush test reference, but the product, weight, dimensions, stacking, and handling path decide whether the selected board fits the job.
| Corrugated reference | Common planning use | What the quote should confirm |
|---|---|---|
| E flute | Fine profile and compact printed surface | Clearance, fold behavior, and print coverage |
| B flute | Balanced cushioning and stackability | Packed weight, pallet pattern, and closure layout |
| C flute | More cushioning or stacking depth | Board thickness and handling conditions |
| 32 ECT | Common corrugated performance reference | Suitability for the shipment plan |
How should I write the dimensions for an RSC?
The dimension string is length x width x depth, with each value labelled as an inside or outside measurement. Inside dimensions are the useful starting point because they describe the product cavity, inserts, and clearance. About 1/16 inch, or 1.5 mm, is a common tolerance reference. The actual result also depends on board thickness, scores, converting, and closure, so measure the packed product and review the assembled sample rather than judging the flat blank alone.
Should I choose flexo or digital print?
Flexographic printing is a common choice for corrugated marks, text, and broad coverage. Digital printing can suit a shorter run, changing artwork, or an artwork trial. Mark the panels that need branding, shipping information, labels, or barcodes, then keep type away from scores, seams, flaps, and tape. RGB art can shift when converted for press, so the proof is where color and small type need a close look.
How do closures and packing motion affect the RSC?
Tape, staples, tuck action, and the packing sequence change the box brief. An RSC relies on meeting flaps, while a roll end tuck top mailer uses a different body and lid relationship. FEFCO 0427 is a common reference for that mailer style. An auto-lock or crash-lock bottom belongs to a different construction decision, so it should not replace an RSC without checking how the packer loads, closes, and reopens the case.
What shipping dimensions should I review before approval?
Dimensional weight is commonly discussed as L x W x H / 139 for US ground planning. That is a carrier convention, not a promised charge. Review the packed outside dimensions, the destination, the number of inner packages, and whether the case travels alone or inside a larger shipper. A box that fits the product can still waste space if the outer dimensions ignore the pallet pattern or the next shipping layer.
What should I include in an RSC specification?
The specification should settle fit, board, closure, print, and delivery before artwork is approved.
- Product dimensions, inside clearance, and packed orientation.
- Flute, board direction, and any 32 ECT reference.
- Closure method, seam position, and packing sequence.
- Print panels, artwork coverage, labels, barcodes, and tape zones.
- Packed outside dimensions, destination, and delivery arrangement.
For a quote, CPL works from a 100-unit minimum, with pricing from $0.49 per unit at volume, quoted to spec. Production is typically 8 to 10 business days after proof approval, plus delivery. Free US shipping, free design support, and a free dieline are available. The $19.99 sample kit is credited toward the first order. For a case, mailer, or mixed shipment request, start with wholesale custom packaging.
Frequently Asked Questions
What information does a regular slotted container quote need?
A regular slotted container quote needs product length, width, and depth, desired inside clearance, packed orientation, approximate weight, flute, board reference, closure method, print coverage, and delivery location. Describe inner boxes or inserts too. Separate inside measurements from outside dimensions, because that distinction changes the dieline, the board clearance, and the finished case fit.
Is E flute always the best choice for a printed shipping case?
E flute is not always the best choice for a printed shipping case. E flute has a finer profile, B flute balances cushioning and stackability, and C flute offers more depth for cushioning or stacking. The product size, packed weight, handling path, closure, and print needs decide the board direction. A flute name alone is not enough to approve the case.
What does 32 ECT mean in an RSC discussion?
32 ECT is a common edge-crush test reference used to discuss corrugated board strength. It does not describe the full performance of every finished case. Confirm the product fit, outside dimensions, flute, stacking conditions, closure, pallet pattern, and handling path before treating 32 ECT as suitable for the shipment.
How do RSC dimensions differ from a mailer box?
RSC and mailer dimensions can both be written as length x width x depth, but their structures open differently. An RSC uses regular meeting flaps, while a mailer uses a tuck or roll end closure. Compare packing motion, product protection, printed panels, closure access, and outside shipping dimensions before choosing between the two formats.
Can an RSC carry printed branding as well as shipping information?
An RSC can carry printed branding and shipping information when the artwork assigns clear panels to each job. Flexo is common for corrugated graphics, while digital printing can suit some shorter runs or changing artwork. Keep barcodes, labels, seams, scores, flaps, and tape areas readable, then review the assembled orientation rather than only the flat artwork.
