GC1 Paperboard Complete Sourcing Guide: Specifications, Comparison, and Buying Checklist

Image: https://ecdn6.globalso.com/upload/p/1649/image_other/2026-07/gc1-application.png

GC1 paperboard is a white back folding box board (FBB [https://www.paperjoypaper.com/fbb/]) defined under DIN 19303, one of the most widely specified cartonboard grades in the global packaging industry. Its three-layer structure - bleached chemical pulp on top, chemi-mechanical pulp (CTMP) in the middle, and bleached or unbleached chemical pulp on the back - balances print quality, stiffness, and cost.

GC1 stands apart from grey back Duplex Board [https://www.paperjoypaper.com/duplex-board/] because its reverse side appears white or light cream. This makes GC1 the preferred choice when the inner surface of a package remains visible to the end consumer, such as in flip-top lids or window-cut boxes.

Typical GC1 Specification Range (Reference Values)

Grammage (gsm)

Thickness (m)

Stiffness MD (mNm)

Stiffness CD (mNm)

Common Use

210

275

5.6

2.8

Small pharma cartons

230

305

7.2

3.4

Dry food boxes

250

335

9.9

4.7

Standard folding cartons

270

360

11.9

5.7

Premium cosmetic boxes

300

405

14.9

7.1

Electronics gift boxes

350

485

21.2

10.1

Heavy-duty packaging

Values are indicative. Actual specs per supplier COA. plus-minus 4% thickness tolerance, 15% stiffness tolerance per ISO 534 and ISO 2493.

Paperjoy supplies GC1 Paper [https://www.paperjoypaper.com/fbb-board-paper-price-coated-c1s-c2s-folding-box-board-gc1-gc2-paper-board-roll/] from 170 to 400 gsm, with or without PE coating, in jumbo rolls or custom-cut sheets.

Four Application Scenarios and How to Select the Right GC1 Grade

Pharmaceutical Packaging (Drug Folding Cartons)

Print needs: mostly text and simple color blocks, high whiteness trust but no extreme gloss.

Recommended: 210-250 gsm. Surface PPS less than or equal to 1.5 m to avoid text blur at small font sizes.

Cosmetics & Premium Retail Packaging

Print needs: large solid areas, hot foil stamping, embossing.

Recommended: 270-350 gsm. Surface strength greater than or equal to 1.2 m/s (IGT picking speed) to prevent coating delamination.

Dry Food Packaging (Biscuits, Confectionery, Gift Food Boxes)

Print needs: vibrant graphics, brand color fidelity.

Recommended: 230-300 gsm. Check FDA 21 CFR 176.170 or local migration limits if direct food contact is required.

Note: GC1 reverse side is white but not designed as a food-contact surface. Upgrade to C1S Ivory Board [https://www.paperjoypaper.com/300gsm-350gsm-400gsm-high-bulk-c1s-packaging-paper-fbb-ivory-board-for-carton-folding-box-product/] or add PE coating for dual-side food contact.

Electronics & Retail Display Packaging

Print needs: multi-color + UV varnish, gloss greater than or equal to 50% at 75 degrees .

Recommended: 250-350 gsm. Pre-test UV absorption rate on the mineral-coated surface before production.

GC1 vs GC2 vs FBB vs C1S - Side-by-Side Comparison

Dimension

GC1

GC2

FBB (Uncoated)

C1S Ivory Board

Back side color

White (bleached)

Cream/natural (mechanical)

Similar to face or darker

White

Coating

Front coated + optional back

Front coated

None or ultra-light

One-side mineral coated

Bulk

High (CTMP core)

Medium

Highest (uncoated fiber)

Medium (chemical pulp)

Print quality

Both sides printable, front superior

Front prints well, back limited

Water-based/flexo suitable

Front premium, back uncoated

Price range

Mid

Mid-low

Mid

Mid-high

Best for

Pharma, cosmetics, dry food

Economy folding cartons

Simple cartons, trays

Premium packaging, albums

Decision Guide:

- Both sides must look consistent right GC1 (the white back advantage)

- Maximum stiffness per gram right FBB (uncoated, bulkiest)

- Front print is everything, back does not matter right GC2 (best value)

- Highest whiteness and dual-side high quality right C1S Ivory Board (fully bleached)

- Need grease/oil resistance right GC1 + PE coating (available from Paperjoy)

Image: https://ecdn6.globalso.com/upload/p/1649/image_other/2026-07/gc1-6-elements-of-procurement.png

Six-Point Inspection Checklist for GC1 Board Buyers

Before placing an order, verify these six parameters with your supplier:

* Grammage Tolerance

ISO allows plus-minus 3%. A 250 gsm board can legitimately range from 242.5 to 257.5 gsm. Suppliers targeting the lower end cut cost at the expense of stiffness.

* Taber Stiffness (MD + CD)

Measured values, not nominal. Low MD stiffness right loose lid closure. Low CD stiffness right poor box compression strength.

* Surface Roughness (PPS 10 m)

Should be less than or equal to 1.5 m per ISO 8791-4. For text below 6 pt, request less than or equal to 1.0 m.

* Surface Strength (IGT Picking Speed)

Minimum 1.2 m/s per ISO 3783. Below this, high-speed offset or UV printing may cause coating pick.

* Moisture Content

Target 7.0% plus-minus 1.0%. Too high right drying problems. Too low right board brittleness. Critical in hot-humid markets (Middle East, Southeast Asia).

* Certifications

ISO 9001, FSC-COC, and if food contact is required - FDA 21 CFR 176.170 compliance or equivalent local regulation.

Image: https://ecdn6.globalso.com/upload/p/1649/image_other/2026-07/gc1-paper-printing.png

Paperjoy GC1 Paper Supply Overview

Paperjoy supplies GC1 paperboard [https://www.paperjoypaper.com/fbbc1s-ivory-board-paper-roll-for-packing-and-printing-product/ /] to packaging converters and brand owners worldwide with the following specifications:

Parameter

Options

Grammage

170-400 gsm

Coating

One-side mineral coated (standard), optional PE coating

Form

Jumbo rolls (core 3/6/12 inch) or sheets (custom size)

Pulp source

Bleached chemical top + CTMP middle (virgin, no recycled)

Certifications

ISO 9001, FSC-COC, FDA 21 CFR 176.170 (if PE coated)

Cutting tolerance

plus-minus 2 mm

Lead time

20-30 days

Target markets

Southeast Asia, Middle East, Europe, Africa

When adding PE coating (7-45 gsm) to GC1, note that the PE layer adds 7-45 m to total caliper but has negligible effect on lateral stiffness. The PE side must face inward (moisture barrier) and the mineral-coated side outward (print surface) - this orientation is critical.

Image: https://ecdn6.globalso.com/upload/p/1649/image_other/2026-07/gc1-paper-roll.png

Quick Selection MnemonicFrequently Asked Questions (FAQ)

Q: What is the difference between GC1 and GC2 paperboard?

A: GC1 has a white back (bleached chemical pulp), while GC2 has a cream/natural back (mechanical pulp). Both have front mineral coating. Choose GC1 when the inner surface of the package remains visible; choose GC2 when only the front exterior matters.

Q: What is GC1 paperboard used for?

A: Four main applications: (1) Pharmaceutical packaging at 210-250 gsm; (2) Cosmetics and premium retail packaging at 270-350 gsm; (3) Dry food packaging at 230-300 gsm; (4) Electronics and retail display packaging at 250-350 gsm.

Q: What certifications should GC1 paperboard have?

A: ISO 9001 for quality management, FSC-COC for sustainable forest sourcing, and for food contact applications - FDA 21 CFR 176.170 compliance or equivalent local regulation.

Q: How to inspect GC1 paperboard quality before ordering?

A: Six-point checklist: (1) Grammage tolerance plus-minus 3%; (2) Taber stiffness MD+CD measured values; (3) Surface roughness PPS less than or equal to 1.5 m; (4) Surface strength IGT greater than or equal to 1.2 m/s; (5) Moisture 7.0% plus-minus 1.0%; (6) ISO+FSC+FDA certifications.

Q: Can GC1 be used for food packaging?

A: Yes for dry food such as biscuits and confectionery. However, the reverse side is not designed as a food-contact surface. For dual-side food contact, upgrade to C1S Ivory Board or add PE coating. Always check migration limits with your supplier's COA.

Closing

This guide covers the essential knowledge for sourcing GC1 paperboard - from understanding its three-layer structure and standard specifications to selecting the right grade for your packaging application. For current pricing, sample requests, or technical questions about your specific project, contact Paperjoy directly.

Media Contact
Company Name: Nanning Paperjoy Paper Industry Co., Ltd.
Email:Send Email [https://www.abnewswire.com/email_contact_us.php?pr=gc1-paperboard-complete-sourcing-guide-specifications-comparison-and-buying-checklist]
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Website: https://www.paperjoypaper.com/

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