Packaging Materials: The Complete Guide to Box Stocks

The stock is what your box is made of. It sets how strong it is, how it prints, how luxe it feels, how green it is, and how much it costs.

It is a separate pick from the box style (the shape). The same mailer can be made in a range of stocks. This full guide covers every stock you will choose from – the four main ones plus the specialty and eco picks. You get weights, eco notes, cost, and a clear way to pick. All are open on our custom printed boxes for any product with no die or plate fees.

What is a packaging material, exactly?

A packaging stock is the sheet your box is cut, folded, and printed from. Most custom boxes are paper-based. They differ in three ways.

The fibers and how they are bleached set the color and print surface. The thickness or number of plies sets strength and feel. Any coating or flute sets guard. Get those three right for your product and the box looks luxe, guards the goods, and costs no more than it needs to.

What is cardstock (SBS paperboard)?

Cardstock – often SBS, or solid bleached sulfate – is a smooth, bright-white paperboard. It takes vivid print well. That is why it is the go-to for retail folding cartons: beauty, supplements, packaged foods, and more.

It is light, ships flat, and is the cheapest stock at higher counts. Food-grade versions work 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.

What is 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 brand. That is why it is a hit with organic, artisan, and refill-first products.

It prints well in an earthy, natural palette. A white under-print 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.

What is corrugated?

Corrugated board has a wavy, fluted layer between flat liners. That flute gives it strength and cushion.

It is the stock behind sturdy shipping boxes and e-commerce mailers. It guards heavier or fragile goods in transit. It is also widely recyclable. Most everyday “cardboard boxes” for shipping are 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.

What is rigid chipboard?

Rigid board (thick chipboard wrapped in printed paper) is the heavyweight of packaging. It does not fold flat. It arrives pre-formed. That is what gives it a solid, luxe feel.

It is the most high-end and the priciest stock. It is saved for products where the unboxing is part of the value, like magnetic-close and two-piece gift boxes.

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

What specialty and eco materials are there?

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). A strong shipping box is corrugated – the one with the fluted inner layer. If a box needs to live through 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.

How do weight, thickness, and grades work?

Within each stock there is a range of thickness. 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 solid but costs more and adds shipping weight.

Corrugated is graded by flute. Larger flutes (like C) give more cushion and stacking strength. Finer flutes (like E and F) give a smoother surface for printing. It is also graded by single- versus double-wall build for heavier loads. We pick the right weight for your product so it feels right without overpaying. Full breakdown: paper weights and thickness explained.

Coated or uncoated stock?

One choice quietly shapes the whole look of a box: coated or uncoated stock. A coated board has a thin clay layer on the surface. It holds ink on top of the paper instead of letting it soak in.

That gives you sharper edges, deeper color, and a slight sheen. 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 soaks into the fibers for a softer, flatter, more feel-first result. That is the natural look most people link to kraft and to high-end minimal 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 photo color and a wipeable surface. Uncoated wins when you want a warm, quiet, hand-made feel. If you are not sure, tell us how the box should feel in the hand. We will steer the stock pick to match.

How does material affect 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. It also shows foil, spot UV, and embossing clearly.

Kraft mutes color (a white under-print brings back the pop). It pairs well with a matte, hand-crafted look. Corrugated takes good print on finer flutes but fits bold, simple graphics best.

Rigid board carries the richest finishes – soft-touch, foil, and deep emboss – because the surface is wrapped printed paper. See our box finishes guide for what each finish does.

Which material fits each industry and use case?

How sustainable is each material?

All paper stocks are recyclable, but they differ. Uncoated kraft and SBS are curbside recyclable and biodegradable. Corrugated is one of the most-recycled stocks in the US and has high recycled content.

Recycled-content and FSC-certified boards let you make a solid sourcing claim. Molded fiber inserts swap out foam for a fully recyclable build. Heavy lamination and mixed stocks cut recycling, so for an eco run keep coats light and pick soy-based inks. Compare end-of-life options in our recyclable vs compostable guide and our sustainable packaging guide.

What does each material cost?

From cheapest to priciest per unit 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 priciest because it is thick and mostly hand-built.

The bigger cost levers are count (price drops fast with volume), finishes, and inserts – not just the base stock. We never charge die, plate, or setup fees. So switching to a custom size or shape does not add tooling cost. See the full breakdown in our packaging cost guide.

Should you test the material before you commit?

A screen can never fully show how a stock will feel or how heavy it reads in the hand. It also can not show how a color sits on brown kraft versus bright white board. So it is worth putting the real stock in front of you before a full run.

The easy way is to ask for a plain sample of the stock and weight you want. Handle it, fold it, and see how it holds a crease. For anything where color accuracy or a finish matters – a foil touch, a soft-touch coat, a set Pantone – ask for a printed proof on the real run stock, not a generic swatch. The same ink looks very different across coated, uncoated, and kraft surfaces.

It also helps to think through the box’s whole trip. A carton that just sits on a shelf can be lighter than one tossed in a mailbag, handled by carriers, and maybe reused by the buyer. Share those details up front. We will pick a weight that lives through the trip without paying for board you do not need.

What common material mistakes should you 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.

What are the 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.

Where can you dig deeper on materials?

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

How do you 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.