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Eska®frogcover
Eska®frogcover

Eska®frogcover

1 mm thick, three-layer board for bookbinding

Eska®frogcover​ is 1 mm lined bookbinding board. The weight of a book bound with Eska®frogcover compares to that of an ordinary paperback. Yet it has the look and appeal of a hardback book. Same weight, different look and feel.

Eska®frogcover is our thinnest (1.00 mm - 675 g/m²) three-layer bookbinding board. With Eska®frogcover you have all the benefits of a hardback book without the weight. A sustainable, luxury look and it stays open during reading. In combination with a range of cover materials and/or top-quality printing, it offers all the options for creative designs. 

Applications

  • School books
  • Children's books
  • Travel guides
  • Brochures for exhibitions and museums
  • Manuals
  • Novels

Sizes

  • Large sheets are available in any size from 500 x 500 mm (19 11/16 x 19 11/16") to 1200 x 1600 mm (47 1/4 x 63").
    larger sizes on request
  • Rotary cut sizes are available in any size from 100 x 150 mm (3 15/16 x 5 29/32) to 480 x 1370 mm (18 29/32 x 53 15/16").
  • Die cut sizes and shapes on request

Quality characteristics

  • Lays flat, stays flat
  • Consistent calipers and sizes
  • Optimal runability
  • Easy to cut, die cut, crease, score, gouge, mill, punch, drill and emboss/deboss

The anatomy of Eska®frogcover

Grey liner made from 100% recycled fibres

Greyboard made from 100% recycled fibres

Grey liner made from 100% recycled fibres

Technical specifications (indication)

Product Caliper According to
ISO 534
Grammage According to
ISO 536
Dynamic stiffness According to
ISO 5629
Bursting Strength According to
ISO 2759
COBB60 According to
ISO 535
 Eska®frogcover mm / inches * gsm MDmNm CDmNm topkPa bottomkPa max topg/m²/60sec max bottomg/m²/60sec
Lined 1.00 / 0.040" 675 270 115 815 815

* Eska®frogcover is produced in mm; the inches in the list are not exact conversions of the calipers in mm,  but the closest US equivalent.

Specifications Units Tolerances Test methods
Caliper See above mm < 1.5 mm
> = 1.5 mm
+/- 0.05 mm (pallet average)
+/- 3% (pallet average)
ISO 534
Size mm Sheets
Rotary cut
Die cut
+/- 1 mm
+/- 0.25 mm
+/-0.2 mm
Flatness 0 % Convex

Concave

S-shape


CD max. 1.5%
MD max. 1.0%
CD max. 1.0%
MD max. 1.0%
CD - sheets < 1 m. max. 3 mm
- sheets > 1 m. max. 5 mm
MD max. 3 mm
Eska
Moisture content Eska®frogcover 7.0% abs. % -1.5 % / +1.0% (pallet average) ISO 287

Product certificates

  • FSC® recycled (CU-COC-809179)
  • PEFC recycled (CU-PEFC-809179)