Custom RSC Boxes | Regular Slotted Container Shipping Packaging
Corrugated box where all top and bottom flaps fold out from the center to create a completely flat opening — maximum stacking strength
Key Features
About Tray Boxes
RSC (Regular Slotted Container) boxes are the most commonly manufactured corrugated box style in the world — a simple, efficient design where all four top flaps and all four bottom flaps extend from the box's four side panels and are slotted at the corners to allow folding without overlapping. When closed, the top and bottom flaps meet (or slightly overlap) in the center, creating a simple, flat closure that requires tape or stapling to secure.
RSC Construction Geometry
The RSC's defining characteristic is its slotted corners — the gaps between adjacent flaps that allow the flaps to fold flat without interfering with each other. These slots create the rectangular gaps visible at each corner of the closed RSC box. The flap depth is designed to be exactly half the box width, so that opposite flaps meet precisely in the center when closed. When flap depth is less than half width, a gap remains in the center; when greater than half width, flaps overlap — the designer specifies flap depth for the desired closure behavior.
RSC Advantages
The RSC's global dominance in corrugated shipping packaging is attributable to its extraordinary efficiency: maximum material yield from the corrugated sheet (the slotted corner design wastes minimal material), compatibility with automated box-making equipment (RSC cuts and scores are the simplest production format), compatibility with automated filling and closing equipment (all flaps fold in the same plane), and maximum stacking strength (the closed RSC's corner columns are continuous from base to top, maximizing vertical load distribution).
Why RSC Dominates Global Corrugated Shipping
The RSC's global dominance — it accounts for more than 50% of all corrugated boxes manufactured worldwide — is not the result of marketing success but of genuine engineering efficiency. The slotted corner design maximizes material yield from the corrugated sheet compared to any other box style. The simple flap geometry is the most compatible with automated box-making equipment, allowing the highest production speeds with the fewest setup adjustments. The closed corner column structure provides superior vertical stacking strength for warehouse and retail storage. And the flat flap closure is the most compatible with automated tape and glue closing equipment. Every efficiency advantage points in the same direction: RSC.
RSC Flap Geometry: Meeting vs. Overlapping
The RSC flap depth determines the closure behavior: flap depth equal to exactly half the box width (the standard specification) causes opposite flaps to meet precisely in the center — the most efficient use of material with complete base coverage. Flap depth greater than half width creates overlapping flaps — used when additional base strength is required because the overlap adds a double-layer zone in the center. Flap depth less than half width creates a gap — used when material economy is prioritized over complete base coverage for very lightweight products. The designer specifies flap depth based on the product weight, filling method, and stacking requirements.
Branded RSC Boxes for E-Commerce Shipping
While the RSC's strengths are functional, the format is also the most common canvas for branded e-commerce shipping packaging — flexographic printing on the RSC exterior transforms a utility shipping container into a brand communication vehicle. Even a single-color logo print on kraft RSC creates a branded shipping experience superior to plain brown boxes. For e-commerce brands with high shipment volumes, branded RSC boxes delivered to customers become a repeated brand touchpoint in the customer's home environment — reinforcing brand recall and contributing to the repeat purchase association that subscription and direct-to-consumer brands build over time.
Quick Specs
- Minimum Order
- 100 units
- Production Time
- 2-3 weeks
- Free Shipping
- Yes
- Printing
- CMYK / Pantone
Industries
Affordable sample kits available
Popular Use Cases
Other Box Styles
Explore more packaging styles.
Tuck End Boxes
The most versatile folding carton style — tuck flaps on both ends create a clean, secure closure for retail and consumer goods packaging
Magnetic Closure Boxes
Rigid set-up boxes with embedded neodymium magnets creating a satisfying snap closure for luxury brand packaging
Sleeve Boxes
Two-piece inner tray and outer sleeve construction creating a controlled sliding reveal for premium product presentation
Pillow Boxes
Curved oval-ended folding carton that creates a distinctive pillow shape for gifts, accessories, and specialty retail
Gable Boxes
Self-erecting folding carton with a distinctive peaked top handle that serves as both closure and carrying mechanism
Two-Piece Boxes
Classic two-component packaging with separate lid and base for premium retail, gift, and apparel presentation
Available Finishes
Enhance your tray boxes with premium finishes.
Industries Using Tray Boxes
Tray Boxes FAQs
What is an RSC box?
RSC stands for Regular Slotted Container — a corrugated box style where all four top flaps and all four bottom flaps extend from the box side panels and are slotted at corners to allow folding without interference. Opposite flaps meet (or overlap) in the center when closed. RSC is the most common corrugated box style globally, accounting for over 50% of all corrugated box production.
What ECT rating do I need for my RSC boxes?
32 ECT (edge crush test) is the standard for general parcel shipping under 20 lbs. 44 ECT handles heavier single items and multi-product shipments from 20–50 lbs. 51 ECT double-wall is appropriate for very heavy or fragile products, or LTL freight applications requiring maximum compression resistance. We specify ECT rating based on product weight, shipping channel, and stacking requirements.
Can RSC boxes be custom-printed?
Yes. RSC boxes are printed using flexographic printing for high-volume branded shipping applications. Single-color, two-color, and full-color flexographic printing are all standard. Litho-laminated RSC boxes achieve near-offset print quality for premium shipping applications where brand presentation is a priority alongside shipping performance.
What is the difference between RSC and FOL (Full Overlap) corrugated boxes?
RSC flaps meet (or slightly overlap) in the center when closed, providing efficient material use and adequate base strength for most applications. FOL (Full Overlap) boxes have flaps sized to fully overlap — one set of flaps runs the full depth of the box and both top and bottom have two complete overlapping layers. FOL provides maximum stacking strength for very heavy products but uses more material than RSC.
What is the minimum order for custom RSC boxes?
Our minimum order is 100 units for custom RSC boxes. RSC boxes are the most efficiently produced corrugated format and are compatible with short-run digital corrugated printing at 100-unit minimums.
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