Rolls of paper stock standing on end in a warehouse.

01 — Specifications

Paper & Packaging

Specification-led paper grades sourced against a written technical sheet.

Paper is decided by grade, grammage, reel width and end use long before price enters the conversation. We work from the buyer's technical sheet and take the requirement to producers and established supply channels, rather than offering a fixed list of stock.

Sack kraft paper — unbleached

Machine-glazed sack grades from unbleached kraft pulp of northern conifers. Grade choice is driven by the filling line: porosity governs deaeration speed, extensibility governs how few plies the bag can carry.

Grade range

Code	Description	Grammage	Plies	Typical use
SKE i4	Ultra-durable extensible	—	1–2	Dry construction mixes, cement
SKE HP	Extensible, high porosity	70–110 g/m²	2–3	Dry mixes, cement
SKE	Extensible	60–100 g/m²	2–3	Dry mixes, cement, animal feed
SKS HP	Semi-extensible, high porosity	60–110 g/m²	3–4	Dry mixes, cement
SKS	Semi-extensible	60–120 g/m²	3–4	Dry mixes, retail, e-commerce, charcoal
SKS WS	Semi-extensible, wet-strength	60–120 g/m²	3–4	Foodstuffs, agricultural products
SKI	Standard improved	50–120 g/m²	1–4	Retail, delivery, seeds, charcoal
SKI WS	Standard improved, wet-strength	—	2–4	Foodstuffs, agricultural products

Indicative technical values — SKE HP

Typical values at ISO 554 conditions (23 °C / 50 % RH). MD = machine direction, CD = cross direction. Tolerance on TEA index ±20 %.

Property	Dir.	70	80	90	100	110
Grammage, g/m²	—	70±2	80±2	90±2.5	100±3	110±3
Tensile strength, kN/m	MD	5.3	6.0	6.8	7.5	8.2
Tensile strength, kN/m	CD	4.5	5.1	5.8	6.4	7.0
Stretch at break, %	MD	7.0	7.0	7.0	7.0	7.0
TEA, J/m²	MD	230	260	300	320	340
Tear index, mNm²/g	MD	13	14	14	15	15
Cobb 60, g/m²	WS	32	32	32	32	32
Air resistance (Gurley), s	—	6	6	6	6	6
Moisture, %	—	7.5	7.5	7.5	7.5	7.5

Sack kraft paper — bleached

Bleached sulphate grades where print quality and shelf appearance matter as much as strength. Whiteness 83 %.

Grade range

Code	Description	Grammage	Plies	Typical use
WSKS HP	Semi-extensible, high porosity	60–100 g/m²	2–3	Dry mixes, cement
WSKS	Semi-extensible	60–100 g/m²	2–3	Dry mixes, retail, food products
WSKI	Standard improved	60–100 g/m²	1–4	E-commerce, retail, delivery, seeds

Kraftliner and speciality

Kraftliner for flat layers (KS)

Primary-fibre liner for external and intermediate layers of corrugated board.

Property	KS-90	KS-100	KS-110	KS-115	KS-125
Grammage, g/m²	90±5	100±5	110±5	115±5	125±6
Thickness, mm	0.15	0.17	0.19	0.20	0.21
Bursting strength, kPa	350	475	525	560	575
Ring crush (CD), N	120	135	160	175	185
Cobb 60, g/m²	25	25	25	25	25
Moisture, %	5–9	5–9	5–9	5–9	5–9

Greaseproof paper

Property	Grade P 40	Grade P 45	Grade P 52
Grammage, g/m²	40+2	45+3−2	52+3
Grease penetration, s (min)	30	28	25
Bursting strength, kPa (min)	240	250	260
Double folds (min)	180	180	180
Whiteness, % (min)	65	65	70
Moisture resistance, %	8±1	8±1	7±1.5

Sack paper from sulphite pulp

RSP carries 5–50 % recovered fibre (OCC 11); VSP is 100 % virgin unbleached sulphite pulp.

Property	RSP	VSP
Grammage range, g/m²	45–110	70–110
Breaking load CD, kN/m (min)	2.6–4.3	3.0–4.0
Relative elongation CD, % (min)	3.0–3.8	2.7–3.7
Tear resistance MD, N/m (min)	30–80	45–65
Cobb 60, g/m² (max)	40	40
Moisture, %	6–11	6–11

Reel specification and testing

Reel dimensions

Reel width 65–250 cm
Standard widths 92, 96, 97.5, 98, 101, 102, 104, 106, 108, 112 cm
Roll diameter 100–120 cm
Inner core diameter 7.6 cm
Neutral packaging available

Testing standards

Grammage — ISO 536
Tensile, stretch, TEA — ISO 1924-3
Tear index — ISO 1974
Water absorption Cobb 60 — ISO 535
Air resistance, Gurley — ISO 5636-5
Moisture — ISO 287
Conditioning — ISO 554 (23 °C / 50 % RH)

Food-contact certification

ISEGA
SOO ST

Shipment modes

Containerised
Break bulk
Rail
Road
Multimodal

Values shown are typical for the grades indicated and are confirmed against the specific parcel offered. Availability, format and grade combination vary by mandate.

Send us the specification

Grade, grammage or dimension, volume and destination are enough for us to come back with something workable.

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