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FSC certified
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Crash Lock Box
Crash lock boxes are one of the quickest types of packaging to assemble. This makes them ideal for packing high volumes by hand and rapid fulfilment, saving time and reducing costs in the process. Often used by e-commerce stores as an alternative to a mailer box.
- FSC certified
- Custom printing
- Custom sizing
- Rapid fulfilment
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Key features
Specification
Materials
- F0
FEFCO 0713
FEFCO 0713 is a pre-glued box made from one piece of board which is commonly used to improve packing efficiency. Shipped flat and ready to use on arrival. - Bk
Brown kraft liner
FSC certified, unbleached and uncoated liner paper made from virgin pulp. Brown kraft liner is a sustainable material that still provides high print performance. - Wk
White kraft liner
FSC certified, bleached liner paper made from virgin pulp. White kraft liner is a good option for printing bold colours without choosing a coated paper. - Wc
White coated liner
FSC certified, bleached liner paper made from recycled and virgin pulp. It’s then coated with kaolin clay to create a smooth surface for printing. White coated liner offers the best print performance. - Bt
Brown testliner
FSC certified paper made from 100% recycled fibres, brown testliner is a cost-effective paper often used on non-printed boxes. Testliner can be printed on but we recommend kraft liners for the best print performance. - Wt
White testliner
FSC certified paper made from 100% recycled fibres, white testliner is a cost-effective paper. It's used on non-printed sides of certain crash lock mailers, which reduces the carbon footprint and cost of your box. We don’t recommend this paper for printing. - E
E-flute
E-Flute (1.5-2.0mm) is widely used for these crash lock boxes. It has great crush resistance for its weight, provides a flat surface for printing and is easy to fold. - B
B-flute
B-flute (2.5-3.5mm) is commonly used across boxes of any size. It has good crush resistance and its thickness offers extra cushioning. - Wb
Water-based inks
Made with water as their primary base, these inks are designed for flexographic printing. More sustainable than solvent-based inks. - Vi
Vegetable-based inks
Made with vegetable oils as their primary base, these inks are designed for high-quality offset printing. More sustainable than solvent-based inks. - Sp
Single peel & seal
One strip of adhesive covered with a fibre-based backing paper. A single peel & seal makes fulfilment fast and helps make your packaging tamper-proof. Adding a peel & seal has minimal impact on your carbon footprint. - Dp
Double peel & seal
Two strips of adhesive covered with fibre-based backing paper. A double peel & seal makes fulfilment fast and returns easy for your customers. Adding a peel & seal has minimal impact on your carbon footprint.
Production
- Op
Offset printing
Offset printing is the standard process for high volume, high-quality printing. It's versatile, offers excellent vibrancy and detail, and is ideal for complex designs, bright colours, text and images. - Fp
Flexographic printing
Flexographic printing is the most cost-effective printing process for high volumes. It's ideal for printing straightforward designs such as logos or simpler graphics and text, but some finer details can lose resolution in print. - 1p
1 colour printing
1 colour printing is the most cost-effective option. Pantone colours ensure consistency for your branding. - 2p
2 colour printing
2 colour printing allows for bold, high contrast designs. Pantone colours ensure consistency for your branding. - Fc
Full colour printing
Full colour printing (CMYK) is ideal for vibrant, multi-coloured designs and images.
Secondary packaging
- Cb
Carton boxes
Below a certain size, crash lock boxes may be packed in cardboard carton boxes and stacked onto a pallet. This protects smaller products in transit and allows for more efficient packing, reducing costs and emissions. - P
Pallet
The majority of boxes are shipped on standard, UK-sized (1.0x1.2m) pallets to ensure ease of delivery. - Sw
Shrink wrapping and plastic strapping
Any corrugated cardboard packaging stacked on pallets is secured with plastic straps to prevent movement during transit. They’re also shrink-wrapped to protect from dust and scratches. This secondary packaging has a negligible effect on a shipment’s carbon footprint and helps ensure products arrive in the best condition.
Transport
- D
Domestic
All domestic transit (UK) is handled by road. Products produced domestically are typically dispatched and delivered 24-48 hours after production is complete.
End of life
- Rr
Roadside recyclable
Sourceful boxes are widely recycled at the roadside, but end-users should always check with their local authority.
Supply chain assurance
A resilient, responsible supply chain
Certifications
Vetted suppliers
Quality control
FAQs
We aim to provide a quote within one working day. Please note that depending on the information you submit, we may need some extra information before we can send you a quote - please provide as much information as possible for faster turnaround.
Crash lock boxes are mostly used for shipping products that are manually packed at scale. They are one of the quickest and most efficient types of packaging to assemble.
Crash lock boxes are easily assembled in one quick action. Simply erect the flat box by pushing the two edges together. As you do this, the base will fold out and lock into place. You can then pack the box and use a peel & seal to seal it.
Based on internal testing, assembling a crash lock box is 40 to 50% faster than assembling a standard mailer box.
Yes! Our design team can work with you to design, ideate and prototype a bespoke solution. If you have any special requirements, such as waterproofing, please mention this in the inquiry form.
It depends on the material you choose, the size of your box, how it's packed and how it's been stored. Incorrect storage, for example, can lead to boxes becoming weaker over time. Fluting too will have an impact on the weight capacity. Typically, we don’t recommend sending anything heavier than 2kg in E-Flute, and anything heavier than 5kg in B-Flute.
If you have a specific weight requirement, please mention this in the inquiry form.
Yes. For the crash lock base to work, your box needs to have a minimum depth of 80mm. Anything smaller and the bases will not lock together correctly. If you want a box with a depth less than 80mm, we recommend a mailer box.
Store your boxes in a dry environment, away from possible sources of moisture like rain, leaks or areas of high humidity. You should also store them at a relatively constant temperature. Learn more
A peel & seal (a built-in self-adhesive strip) is the easiest and fastest way to seal a crash lock box.
Crash lock boxes are delivered flat, which is ideal for storage. They can then be easily assembled by hand.
Lead times vary based on the complexity of your design. Typically, crash lock boxes are designed, produced and delivered between two and four weeks.
MOQ stands for Minimum Order Quantity. The guideline MOQ for crash lock boxes is 3,000 units, but the exact MOQ will depend on the final approved dimensions of your packaging.