Packaging Materials: The Complete Guide to Box Stocks

The material is what your box is made of – and it decides how strong it is, how it prints, how premium it feels, how sustainable it is, and how much it costs. It is a separate choice from the box style (the shape): the same mailer can be made in different materials. This complete guide explains every material you will choose between – the four main stocks plus the specialty and eco options – with weights, sustainability, cost, and a clear way to pick. All are available on our custom printed boxes for any product with no die or plate fees.

What is a packaging material, exactly?

A packaging material (or stock) is the sheet your box is cut, folded, and printed from. Most custom boxes are paper-based, and they differ in three ways: the fibers and how they are bleached (which sets the color and print surface), the thickness or number of plies (which sets strength and feel), and any coating or flute (which sets protection). Get those three right for your product and the box looks premium, protects the contents, and costs no more than it needs to.

Cardstock (SBS paperboard)

Cardstock – often SBS, or solid bleached sulfate – is a smooth, bright-white paperboard. It takes vivid print beautifully, which makes it the default for retail folding cartons: cosmetics, supplements, packaged foods, and more. It is lightweight, ships flat, and is the most economical material at higher volumes. Food-grade versions are available for direct food contact.

Best for: retail shelf products and high-volume runs. Common in folding cartons for retail products and custom printed cosmetic boxes. Deep dive: SBS cardstock guide.

Kraft

Kraft is an unbleached paperboard with a natural brown look and high tear strength. It is recyclable, often made with recycled content, and signals an honest, eco-conscious brand – which is why it is popular with organic, artisan, and refill-focused products. It prints well in a more earthy, natural palette, and a white underprint lets bright colors pop on the brown stock.

Best for: natural and sustainable brands. See kraft boxes for natural brands and custom kraft paper for packaging; deep dive: kraft paperboard guide.

Corrugated

Corrugated board has a wavy, fluted layer sandwiched between flat liners – that flute is what gives it strength and cushioning. It is the material behind sturdy shipping boxes and e-commerce mailers, and it protects heavier or fragile goods in transit. It is also highly recyclable. Most everyday “cardboard boxes” for shipping are actually corrugated.

Best for: shipping, heavy items, and protective outer boxes. See strong corrugated shipping boxes, recyclable cardboard shipping boxes, and mailer boxes for e-commerce shipping; deep dive: corrugated and shipping boxes guide.

Rigid chipboard

Rigid board (thick chipboard wrapped in printed paper) is the heavyweight of packaging. It does not fold flat – it arrives pre-formed, which is what gives it that solid, luxury feel. It is the most premium and the most expensive material, reserved for products where the unboxing is part of the value, such as magnetic-closure and two-piece gift boxes.

Best for: luxury, gifting, and high price points. See premium rigid gift boxes and magnetic closure gift boxes.

Specialty and eco materials

Beyond the four main stocks, a few specialty materials solve specific needs:

• Recycled-content board – SBS or kraft made with post-consumer recycled fiber to cut virgin material, with the same printability.
• FSC-certified stock – responsibly sourced paper for brands that want a recognized certification on the box.
• Food-grade board – SBS and kraft rated for direct food contact, with grease-resistant options for bakery and oily foods. See our food-safe packaging guide.
• Molded fiber / paper pulp – for protective inserts and trays that are recyclable and compostable, an alternative to foam.
• Window film (PET or PVC) – a clear patch over a die-cut opening so shoppers see the product; PET is a common food-grade-compatible choice.

Quick comparison

Cardboard vs. corrugated: what's the difference?

People use “cardboard” for almost any paper-based box, but it is a loose term. In practice, a thin printed retail box is paperboard (cardstock), while a strong shipping box is corrugated – the one with the fluted inner layer. If a box needs to survive the mail, you want corrugated.

Which material should you choose?

Three questions point you to the answer:

• Does it ship on its own? If yes, lean corrugated for protection.
• Is it sold on a shelf? Cardstock prints brightest for retail.
• How premium is it? Rigid for luxury; kraft for natural and economical.

Still deciding? Our box styles guide covers the shape, and our team will recommend the right material and build a free dieline – just describe your product on your quote request.

Weight, thickness, and grades

Within each material there is a range of thickness, and it changes both the feel and the cost. Paperboard is measured in caliper (points, where 1 pt = 0.001 inch) or GSM (grams per square meter); a heavier board feels more substantial but costs more and adds shipping weight. Corrugated is graded by flute profile – larger flutes (like C) give more cushioning and stacking strength, finer flutes (like E and F) give a smoother surface for printing – and by single- versus double-wall construction for heavier loads. We recommend the right weight for your product so it feels right without overpaying. Full breakdown: paper weights and thickness explained.

Coated versus uncoated stock

One choice that quietly shapes the whole look of a box is whether the stock is coated or uncoated. A coated board has a thin clay layer applied to the surface, which holds ink on top of the paper instead of letting it soak in. That gives you sharper edges, deeper color, and a slight sheen, and it is why bright retail cartons almost always start from a coated one-side (C1S) or two-side (C2S) sheet. An uncoated board has no such layer, so ink absorbs into the fibers for a softer, flatter, more tactile result – the natural look most people associate with kraft and with premium minimalist brands. Uncoated stock is also easier to write or stamp on, which matters for boxes that get hand-labeled or dated. Neither is better in the abstract: coated wins when you need punchy photographic color and a wipeable surface, while uncoated wins when you want a warm, understated, hand-made feel. If you are unsure, tell us how the box should feel in the hand and we will steer the stock choice to match.

How material affects printing and finishes

The stock is the canvas, so it shapes how finishes land. Bright SBS holds the sharpest full-color CMYK and Pantone print and shows foil, spot UV, and embossing crisply. Kraft mutes color (a white underprint restores vibrancy) and pairs naturally with a matte, handcrafted look. Corrugated takes good print on finer flutes but is better suited to bold, simpler graphics. Rigid board carries the most premium finishes – soft-touch lamination, foil, and deep emboss – because the surface is wrapped printed paper. See our box finishes guide for what each finish does.

Material by industry and use case

Sustainability of each material

All paper-based stocks are recyclable, but they differ. Uncoated kraft and SBS are curbside recyclable and biodegradable; corrugated is one of the most-recycled materials in the US with high recycled content; recycled-content and FSC-certified boards let you make a credible sourcing claim; and molded fiber inserts replace foam for a fully recyclable build. Heavy lamination and mixed materials reduce recyclability, so for an eco program keep coatings minimal and choose soy-based inks. Compare end-of-life options in our recyclable vs compostable guide and our sustainable packaging guide.

What each material costs

From lowest to highest per-unit cost at the same size: kraft and SBS cardstock are the most economical and ship flat; corrugated costs a bit more for the extra board and bulk; rigid is the most expensive because it is thick and largely hand-assembled. The bigger cost levers are quantity (price drops sharply with volume), finishes, and inserts – not just the base stock. Because we never charge die, plate, or setup fees, switching to a custom size or shape does not add tooling cost. See the full breakdown in our packaging cost guide.

Test the material before you commit

A screen can never fully show how a stock will feel, how heavy it reads in the hand, or how a color sits on brown kraft versus bright white board, so it is always worth putting the real material in front of you before a full run. The simplest approach is to request a plain sample of the stock and weight you are considering, handle it, fold it, and see how it holds a crease. For anything where color accuracy or a finish matters – a foil accent, a soft-touch coat, a specific Pantone – ask for a printed proof on the actual production stock rather than judging from a generic swatch, because the same ink looks noticeably different across coated, uncoated, and kraft surfaces. It also helps to think through the box’s whole journey: a carton that only sits on a shelf can be lighter and more delicate than one that will be tossed in a mailbag, handled by several carriers, and possibly reused by the customer. Sharing those details up front lets us recommend a weight that survives the trip without paying for board you do not need.

Common material mistakes to avoid

• Using paperboard for shipping. A pretty SBS carton will arrive crushed if mailed alone – ship it inside corrugated.
• Over-speccing rigid. Rigid is gorgeous but costly; many "premium" looks are achievable with SBS plus a soft-touch and foil finish.
• Forgetting food-grade. Direct food contact needs a food-grade board and inks – standard stock is not automatically food-safe.
• Heavy lamination on an "eco" box. A thick plastic laminate can make a kraft box non-recyclable, undercutting the message.
• Printing bright color on raw kraft. Without a white underprint, colors look muddy on brown stock.

Expert tips

• Match the stock weight to the product weight – a light product in heavy board wastes money and shipping.
• Order a physical sample of the stock and finish before a large run; screens lie about texture and color.
• For a sustainable claim, lead with the material (kraft/recycled/FSC) and keep the finishes recyclable.
• If you ship and sell on a shelf, use two materials: a corrugated shipper around a printed retail carton.

Dig deeper: material guides

For a closer look at a material, see our focused articles:

• SBS cardstock – the retail carton standard.
• Kraft paperboard – natural and recyclable.
• Paperboard vs. corrugated – which "cardboard" you need.
• Weight & thickness – GSM, points, and caliper explained.

Frequently asked questions about packaging materials

Get the right material for your product

Whatever you choose, we print it with no die or plate fees, free design and a free dieline, a 100-box minimum, and an 8–10 day turnaround. Browse the stocks on our packaging materials and box stocks page, or new to all this? Start with our beginner’s guide, then request your free quote or contact our team.