EN
140–180 gsm
Heavyweight Art Stock
Zero bleed from alcohol markers
Contract manufacturing for art publishers, independent artists, and illustrated book brands. We specialize in heavyweight 140–180gsm bleed-proof paper stocks, PUR flexible lay-flat binding, and high-fidelity 8-color offset color management.
140–180 gsm
Zero bleed from alcohol markers
15,000 m²
Shenzhen owned facility
500 Pcs
Direct factory scaling
PUR & Sewn
Effortless two-page coloring
Product Diversity
Engineered for bookstores, gallery exhibitions, and retail gift distribution. No print-on-demand limitations—industrial volume offset quality.
Heavyweight 160gsm woodfree interior paper prevents colored pencil, gel pen, or marker bleed-through. Micro-perforated pages allow clean tearing.
Thick unbent 3.0mm greyboard cases wrapped in coated art paper, natural book cloth, or linen. 8-color offset ensures smooth gradients and skin tones.
Double-loop Wire-O and hidden spiral hardcover formats allowing 360° rotation. Ideal for field sketchbooks, instructional manuals, and art courses.
Custom journals with debossed PU leather or printed fabric covers, elastic closure bands, expandable back document pockets, and gilded edges.
Paper & Color Calibration
Standard commercial print stock bleeds when illustrators use alcohol markers or wet media. Our coloring book editions use dense 160gsm woodfree paper with surface sizing that holds sharp line art without feathering.
Printed on Komori Lithrone 8-color presses with closed-loop spectrophotometry. Delta-E variance is strictly controlled within 1.5 across runs up to 50,000+ units.
Inquire About Paper Swatch Books →Standard specifications for trade offset runs. Tailored to custom trim dimensions and spread counts.
| Parameter | Factory Standard | Testing & Verification |
|---|---|---|
| Interior Paper Stock | 120–180gsm Uncoated Woodfree Paper, 128–200gsm Matte/Gloss Coated Art Paper | Tested against bleed-through from solvent markers |
| Standard Trim Sizes | 8.5"x11" (Letter), 8"x10", 9"x12", 11"x14", A4, A5, or custom landscape formats | Precision three-knife trimming tolerance ±0.5mm |
| Binding Options | Casebound Smyth-sewn, PUR softcover, Wire-O double loop, Swiss binding | 180° true lay-flat across center gutters |
| Cover Embellishments | Anti-scratch matte lamination, spot gloss UV, multi-level 3D embossing, hot foil | Tape pull adhesion tested on all foil stampings |
| Printing Machinery | 11 Multi-color offset presses (Komori Lithrone G40 & Heidelberg Speedmaster) | Closed-loop spectrophotometry (ΔE < 1.5) |
| Order Quantity (MOQ) | 500 copies (Industrial Offset Minimum) | Scales to 100,000+ volume runs |
| Export Carton Specs | 5-ply corrugated export cartons (<14.5kg per carton), polybag shrink wrap, pallets | ISTA 1A maritime drop test certified |
Advice on paper selection, color proofs, and binding flat-lay performance.
We recommend 140gsm or 160gsm uncoated woodfree art paper. This weight provides enough tooth for colored pencils while preventing solvent and alcohol markers from bleeding through to the reverse illustration. For single-sided coloring books, 140gsm is standard; for double-sided designs, 160gsm or 180gsm is required.
PUR (Polyurethane Reactive) glue forms a flexible chemical bond that cures via atmospheric moisture. Unlike standard EVA hot-melt glue, which hardens rigid and cracks when forced flat, PUR allows thick books to lay completely flat at 180° without page pull-out, making coloring and reading effortless across the spine gutter.
We provide G7 calibrated Epson digital proofs on paper matching your chosen interior stock for color sign-off. We also provide unprinted structural white dummies in 2–3 business days to verify book weight, board rigidity, and spine thickness before exposure of CTP metal plates.
Send us your trim size, page count, and estimated order run. Our prepress team will provide CAD dieline templates, material swatch options, and technical feedback in 12 hours.
Request CAD Dielines & Paper Samples →