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EVF94020

Paperboard Display Frame & Shadow Box

The EVF94020 is a one-piece folding carton that rolls backward and inward to create a hollow, three-dimensional border around a central opening. It holds its shape entirely through rear friction locks, requiring no glue to assemble.

Because the center is completely cut out, this frame is typically used for retail presentation, shadow boxes, or as an internal perimeter spacer. The primary tradeoff is material efficiency: the central window generates continuous waste unless smaller packaging components can be nested inside it during production.

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  • Available in a wide variety of configurations.

At a glance

  • Creates a hollow 3D border with an open front
  • Assembles manually via rear tuck-and-slit locks
  • Best suited for folding boxboard (FBB) or solid bleached board (SBB)

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Retail Framing And Internal Spacing

Retail shadow boxes and display frames

The hollow walls create a clean, elevated border around the product, drawing attention to the center. The rear flaps sit flat against a wall or the back of a master display, keeping the locking mechanism hidden from the consumer.

Internal perimeter spacers

When placed inside a larger master carton, the hollow frame acts as a crush zone. It holds a central item away from the outer walls, absorbing edge impacts during transit.

Picture and artwork framing

The hollow walls provide a gallery style border for flat artwork or printed media. The unglued assembly allows the frame to be shipped flat and erected on site.

Component separation in master cartons

The frame can hold a central heavy item in place while keeping lighter accessories separated in the hollow perimeter space, provided the outer carton keeps everything contained.

Merchandising And Kitting Operations

Product kitting and gift sets

Kitting teams use these frames to organize multiple items or highlight a premium product within a larger gift box. The manual assembly fits well into hand-packing lines where workers are already arranging components.

Retail merchandising and window displays

Visual merchandising teams use the hollow border to elevate products on shelves without enclosing them in plastic or glass. The paperboard construction allows for full color printing on the front facing border.

E-commerce unboxing presentations

Brands use the frame inside a mailer to create a staged, centered presentation when the customer opens the outer box. The frame fills the void space and presents the product immediately upon opening.

When To Consider Closed Cartons Or Trays

When the product needs front protection

This frame leaves the central window completely open. If the product requires a physical barrier against dust or handling, a windowed folding carton with a clear film patch or a fully enclosed sleeve is a safer choice.

When packing speed is the top priority

Rolling the four sides and engaging the rear tuck locks takes dedicated manual labor. For high-speed fulfillment, a pre-glued crash-lock tray or an automated wrap-around carton may be more practical.

Material Waste And Assembly Planning

Managing the central cutout waste

The large window in the middle of the blank is removed during die-cutting. To improve material efficiency, discuss whether smaller items like header cards, tags, or internal dividers can be nested into that empty space on the cutting die.

Board thickness and fold quality

This design relies on sharp 90-degree folds to create a crisp frame. Standard folding boxboard (FBB) or solid bleached board (SBB) yields the best results. Thicker corrugated boards, even micro-flutes, can cause the hollow walls to bow and require heavy adjustments to the locking slits.

Assembly labor and packing speed

The manual folding and locking sequence takes time. Buyers should weigh the presentation value against the labor required at the packing station, especially for high volume runs.

Outer packaging fit

Because the frame is open and relies on friction locks, it often benefits from a closely fitted outer carton or sleeve to keep the locks engaged and the product secure during transit.

Adjusting The Frame Border And Depth

Frame width and depth

The width of the visible border and the depth of the hollow walls can be adjusted to fit the product. However, the rear locking flaps should be sized carefully so they do not protrude into the viewing window.

Adding a clear film window

While the native template is an open aperture, a clear film can be glued to the back of the front face before the frame is folded. This adds a separate window-patching operation during manufacturing.

Rear locking flap height

The trapezoidal rear flaps can be shortened to ensure they stay hidden behind the frame walls, depending on the chosen border width and the overall frame dimensions.

Packing details

Grain direction for long frames

For frames with a long rectangular shape, the paperboard grain should run parallel to the longest edges. This helps prevent the hollow walls from bowing outward after assembly.

Additional notes

Rear surface flatness

Because the rear flaps overlap to lock, the back of the frame is not perfectly flush. This slight unevenness is usually unnoticeable when the frame is placed against a wall or the bottom of an outer box.

Related Display And Spacer Packaging

FAQs

Does this frame require glue to hold its shape?

No. The frame rolls inward and secures itself using tuck tongues that insert into receiving slits on the rear flaps. The entire structure holds together through mechanical friction.

Can this frame be made from corrugated board?

It is primarily designed for paperboard. Using corrugated board, even thin micro-flutes, makes the inward-rolling folds difficult and requires significant changes to the locking tabs to accommodate the extra material thickness.

Will the rear flaps be visible from the front?

Not if proportioned correctly. The height of the rear flaps should be kept shorter than the width of the front border so they remain hidden behind the frame walls.

Can this frame be shipped through parcel networks on its own?

No. The frame has an open front and relies on friction locks. It is usually placed inside a master shipper, mailer, or outer carton for transit.

Why is the central window considered a cost driver?

The material removed to create the opening is usually discarded. If your order volume is high enough, the factory may be able to cut smaller packaging pieces from that central waste area to improve overall material efficiency.

Can this frame be erected by automated machinery?

No. The inward-rolling fold sequence and the manual insertion of the rear tuck locks rely on hand assembly at the packing station.

How does the frame stay together without glue?

The side rear flaps have tuck tongues that insert into receiving slits on the top and bottom rear flaps, creating a mechanical friction lock that holds the hollow walls in place.

Can the hollow walls hold small accessories?

While the walls are hollow, they are not enclosed on the back. Accessories placed inside the walls may fall out unless the frame is glued to a backing board or placed tightly against a master carton wall.

Review your product dimensions and presentation goals to determine the right border width and depth for your frame.