Kraft Paper Packaging: Types, Properties, and When to Use Each One

Kraft paper is the most widely used packaging material on the planet, and most people couldn't name more than one type of it. That's a problem, because picking the wrong kraft grade wastes money, underperforms on the shelf, or fails in the supply chain.

The FAO reported over 40 million metric tons of kraft pulp produced globally in 2024. That's an enormous material category with real variation across grades. Here's every major type, what it actually does, what it costs, and where it belongs.

What Makes Kraft Different From Regular Paper

The word "kraft" is German for strength. Not a marketing term — a physical description.

The kraft pulping process (sodium hydroxide + sodium sulfide) breaks down wood chips while preserving long cellulose fibers. Standard mechanical pulp retains lignin, which makes paper weaker and yellowing-prone. Kraft pulp removes 90-95% of lignin during cooking (TAPPI Journal, 2023), producing fibers that bond tighter and hold together longer.

The result: 15-25% stronger than equivalent-weight mechanical papers. That gap widens when things get wet. Natural kraft retains 30-40% of its dry tensile strength under wet conditions. Regular uncoated paper? Five to ten percent (Smithers Pira, 2024).

That wet strength is exactly why kraft dominates shipping, food service, and industrial wrapping.

Natural Brown Kraft: The One Everyone Knows

The unbleached, uncoated version. Brown color comes from residual lignin left after pulping — just enough for color, not enough to weaken the fibers.

Properties:

• Basis weight: 30-120 GSM (most common: 70-90 GSM)
• Tensile strength: 4.5-7.5 kN/m (machine direction)
• Tear resistance: 250-500 mN (Elmendorf)
• Cost: $800-$1,200 per metric ton (Q1 2026, RISI)

Natural brown kraft is everywhere — e-commerce cushioning wraps, grocery bags, bakery bags, sandwich wraps. The Fibre Box Association (2025) puts its share at roughly 34% of all packaging paper consumed in North America.

Prints reasonably well with flexo inks, though the brown surface mutes colors compared to white substrates. But that's the point for some brands. Artisan bakeries, organic food companies, craft breweries — they want the brown base. It signals "natural" and "honest" without saying a word.

Bleached White Kraft: When the Surface Has to Perform

Bleached kraft goes through additional processing — typically ECF (elemental chlorine-free) or TCF (totally chlorine-free) bleaching — to strip remaining lignin and produce a bright white sheet. More processing, more cost, better canvas.

Properties:

• Basis weight: 40-150 GSM
• Tensile strength: 4.0-7.0 kN/m (slightly lower than unbleached — bleaching shortens fibers 5-8%)
• Brightness: 80-88% ISO
• Cost: $1,100-$1,600 per metric ton (Q1 2026)

Retail shopping bags, pharmaceutical packaging, anything where brand color accuracy matters. Packaging Digest (2025) found bleached kraft delivers 20-30% better color reproduction fidelity than natural brown under CMYK flexo.

The strength drop from bleaching is real but marginal for most packaging. Where it matters: heavy-duty industrial wrapping or bags carrying 25+ lbs. For those, stick with unbleached.

Recycled Kraft: Cheaper, Weaker, Increasingly Required

Recycled kraft uses post-consumer or post-industrial recovered fiber. Content ranges from 50% to 100% recycled.

Properties:

• Basis weight: 60-120 GSM
• Tensile strength: 2.5-5.0 kN/m (30-40% lower than virgin kraft)
• Cost: $600-$900 per metric ton (Q1 2026)

That strength penalty is the main limitation. Cellulose fibers shorten every recycling cycle. After 5-7 passes through repulping, they're too short to form strong bonds (Journal of Cleaner Production, 2024). Most recycled kraft blends in some virgin fiber to meet minimum performance specs.

But here's the thing: for secondary packaging, retail tissue, gift wrap, and void fill, you don't need extreme tear resistance. Recycled kraft handles those jobs fine.

The European Recovered Paper Council (2025) reported recycled kraft consumption in Europe grew 12% year-over-year in 2025, driven by EPR regulations in France, Germany, and Spain. For brands under pressure to hit sustainability targets, recycled kraft checks the compliance box at a lower price than virgin alternatives.

Sack Kraft: The Heavy Lifter

Sack kraft goes through a mechanical creping process that gives it stretch — 6-10% elongation before breaking, versus 2-4% for standard kraft. That stretch absorbs impact when a 50-lb bag gets dropped or tossed.

Properties:

• Basis weight: 70-100 GSM
• Elongation at break: 6-10%
• Burst strength: 350-550 kPa (Mullen)
• Cost: $1,000-$1,400 per metric ton

This is the material inside multiwall bags carrying cement, flour, animal feed, pet food, and chemicals. The Freedonia Group (2025) estimates the global multiwall sack market at $5.2 billion.

Sack kraft must meet ISO 16532 standards. Its extensibility reduces burst-through failures by up to 60% compared to standard kraft at the same basis weight. When a bag falls four feet off a pallet, that elasticity is the difference between a mess and an intact package.

MG (Machine-Glazed) Kraft: Smooth on One Side

MG kraft passes over a heated Yankee dryer cylinder during production. One side contacts the hot cylinder and comes out glossy-smooth. The other stays rough.

Properties:

• Basis weight: 30-80 GSM
• Surface smoothness (glazed side): 1.5-3.0 um (Sheffield)
• Grease resistance: moderate to good
• Cost: $900-$1,300 per metric ton

The smooth side resists grease and prints crisply. That makes MG kraft the go-to for butcher paper, deli wrap, fast-food liners, and gift wrap. Smithers (2025) puts it at about 8% of global packaging paper demand — a niche, but a stable one.

MG kraft also works well as interleaving paper between glass or metal sheets in industrial settings. The smooth surface prevents scratching.

Coated Kraft: Adding Barriers

Coated kraft adds a functional layer — PE, PLA, wax, or water-based coatings — to block moisture, grease, or oxygen.

Here's how the main coatings compare:

• PE (polyethylene): Best moisture barrier (MVTR 5-15 g/m2/day). Grease-proof. Difficult to recycle. Cost premium: +25-35%.
• PLA (polylactic acid): Good barrier (MVTR 20-40). Industrially compostable. Cost premium: +30-45%.
• Water-based dispersion: Moderate barrier (MVTR 30-80). Curbside recyclable. Cost premium: +15-25%.
• Wax: Good moisture barrier (MVTR 10-20). Not recyclable. Cost premium: +10-20%.

The industry is moving away from PE coatings toward water-based alternatives. CEPI (2025) reported water-based coated kraft grew 28% in European markets during 2025, pushed by single-use plastic regulations.

I think we'll look back on 2024-2026 as the tipping point where water-based coatings went from "interesting alternative" to default specification.

How to Choose the Right Kraft

Four questions. Get these right and the material picks itself.

1. What forces will the package face? Heavy or dynamic loads need sack kraft or heavy natural kraft. Light wrapping works with recycled or MG kraft.
2. Does the surface need to print well? Bleached or MG kraft for best print quality. Natural brown for single-color or rustic aesthetics.
3. Does it contact food or liquid? Food contact requires FDA or EU 1935/2004 compliant grades. MG and coated kraft provide grease resistance.
4. What's your sustainability requirement? Recycled kraft hits post-consumer content targets. Water-based coated kraft maintains recyclability. Uncoated natural kraft is the easiest to recycle of all.

Pricing and Supply: Where Things Stand in 2026

Prices have stabilized after the 2022-2024 volatility. RISI/Fastmarkets Q1 2026 puts North American unbleached kraft linerboard at $870-$920 per short ton — down 8% from the 2023 peak, still 14% above pre-pandemic levels.

Three dynamics to watch:

• Nordic softwood supply remains tight from bark beetle damage in Sweden and Finland
• Southeast Asian capacity expanded 3.2 million tons in 2024-2025 (Indonesia, Vietnam), putting downward pressure on global pricing
• Recycled fiber demand growing faster than collection in several European markets, pushing recycled kraft pricing closer to virgin grades

For packaging buyers: lock in 6-12 month contracts if you rely heavily on kraft. Spot market volatility still runs +/-10-15% quarter-over-quarter.

Frequently Asked Questions

What's the difference between kraft paper and regular paper?

Kraft uses the sulfate pulping process, preserving long cellulose fibers and removing most lignin. It's 15-25% stronger than equivalent-weight mechanical papers. Regular paper uses shorter fibers optimized for smoothness and printability, not strength.

Is kraft paper recyclable?

Uncoated kraft (natural and bleached) recycles through standard curbside programs — over 80% recycling rate in North America (AF&PA, 2025). Wax-coated and PE-coated kraft are not recyclable in most systems. Water-based coated kraft is recyclable where updated sorting infrastructure exists.

How much weight can a kraft paper bag hold?

A standard single-layer natural kraft grocery bag (70 GSM) safely holds 8-12 lbs. Multiwall sack kraft bags (2-4 layers, 70-90 GSM) carry 25-50 lbs, with some industrial configs rated over 100 lbs. Ply count, basis weight, and whether extensible (sack) kraft is used all matter.

Is bleached kraft weaker than natural kraft?

Slightly. Bleaching degrades fibers 5-8%, reducing tensile strength. Imperceptible for most packaging applications. For heavy-duty bags and industrial wrapping where maximum strength is non-negotiable, use natural unbleached.

What is MG kraft used for?

Primarily food wrapping (butcher paper, deli wrap, bakery sheets), gift wrap, and interleaving between fragile products like glass and metal. The smooth glazed surface resists grease and accepts high-quality printing.