India's book publishing industry — the scale
India is the world's second-largest English-language book market and the largest in terms of total titles published across all languages. The Indian book publishing market was estimated at approximately ₹50,000 crore (2024) including educational textbooks, trade books, and digital. Physical book printing remains enormous — India's government textbook programme alone (NCERT, state boards) runs to hundreds of millions of copies annually. The school textbook procurement cycle that runs April–June each year is one of the largest single print procurement events in Asia.
Book printing formats and processes
Sheetfed offset — the quality benchmark
Premium trade books, coffee table books, art books, and children's illustrated books in India are printed on sheetfed offset presses. The process allows: coated paper (art paper or high-quality matte) for full-colour reproduction, tight register for detailed illustration, and the ability to print special colours and specialty finishes (UV spot, foil) alongside text. Publishers supplying to export markets (Penguin, Scholastic, Dorling Kindersley — all have India printing operations) typically specify sheetfed offset on 90–130 gsm coated art for illustrated content.
Web offset — the volume workhorse
Heatset web offset is used for: magazines, catalogues, paperback novels, and educational textbooks where volume (typically 5,000+ copies) justifies the reel-to-reel format. Heatset web differs from coldset (newspaper) in having a heated drying tunnel after printing — the heat evaporates the oil vehicle in the ink, enabling printing on coated paper (magazines use 60–80 gsm lightweight coated paper). India's major book printing cities (Chennai, Hyderabad, Noida, Mumbai) all have large-format heatset web offset installations for educational and trade book production.
Digital printing — short run and print-on-demand
Digital printing (toner-based: Kodak Nexpress, HP Indigo, Ricoh Pro C series; inkjet: Kodak Prosper, HP PageWide) serves: short-run trade books (under 500 copies), academic and professional books (law, medicine — frequently revised, low quantities), print-on-demand for backlist titles, and academic publishers with 50–200 copy print runs. The economics of digital vs offset for books cross over at approximately 300–800 copies depending on page count, paper, and binding.
Book paper grades and specifications
Maplitho (uncoated wood-free)
The standard paper for Indian educational textbooks, novels, and reference books. Maplitho is an uncoated wood-free paper available in 60–90 gsm. NCERT specifies its own paper grades for national textbooks. Key properties: good opacity for text, printable by web or sheetfed offset, takes text ink well, lower cost than coated alternatives. Not suitable for full-colour photographs — ink absorbs and spreads, reducing sharpness.
Cream wove / ivory
Off-white uncoated paper used for literary fiction and novels where the warmer tone is preferred over pure white for extended reading. Typically 70–80 gsm, lower brightness than white maplitho (75–80% ISO versus 84–88% for white maplitho). The lower brightness reduces eye strain for sustained reading — a genuine ergonomic consideration for 300+ page books.
Coated art paper for books
Gloss or matte coated paper used for: children's picture books, coffee table books, art books, travel guides, and any book with significant full-colour photography. 90–130 gsm for text and illustration pages; 170–300 gsm for covers before lamination. The coating provides a smooth surface for halftone dots — photographs and detailed illustrations reproduce with higher fidelity than on maplitho.
Bible paper
Ultra-thin (28–40 gsm), high-opacity paper for Bibles, dictionaries, and reference works where total book thickness is a consideration. Expensive per kg (the thin caliper requires special paper engineering to achieve opacity). India imports bible paper primarily from Munken (Sweden) and Glatfelter (Germany). Requires careful press setup — the thin paper is fragile and tears easily at high web tension.
Binding methods for books
Saddle stitching (maximum ~80 pages)
Wire staples through the spine fold — used for magazines, brochures, thin booklets. Maximum practical page count approximately 80 pages (20 A4 sheets folded). Beyond this, the publication cannot fold flat and the staple length becomes too long for reliable penetration.
Perfect binding — paperback books
Signatures (groups of folded sheets) are collated, the spine edge is roughened, a flexible PVA adhesive is applied, and a cover is glued to the spine. The standard binding for paperback novels, textbooks, and catalogues. Minimum practical page count approximately 48 pages (below this the spine width is too narrow for reliable glue adhesion). Can be done on automatic perfect binding lines at 3,000–4,000 books per hour.
PUR binding — premium paperbacks and layflat books
Polyurethane reactive (PUR) adhesive instead of PVA. PUR bonds are stronger (pages resist pull-out), more flexible (books can be opened flat without spine cracking), and more temperature-resistant. Required for: books that must open completely flat (cookbooks, music books), books printed on coated paper (PVA does not adhere well to coated paper — PUR is essential), and books intended for export to humid climates where PVA can soften.
Case binding (hardcover)
Sewn signatures + rounded and backed spine + glued-in hard case. The most durable and prestigious book format. Used for: reference books intended to last decades, gift books, museum catalogue editions. Case binding is significantly more expensive — sewn signatures alone cost 3–4× more than perfect-bound equivalent. Most Indian publishers reserve case binding for art books, premium gift editions, and export hardcover titles.
NCERT and government textbook printing — the India-specific context
The National Council of Educational Research and Training (NCERT) is the largest single customer for book printing in India. NCERT textbooks are printed at its own presses (the NCERT printing press, New Delhi) and through approved vendors empanelled by state governments. State governments operate their own textbook printing programmes — each state education board specifies and procures independently. The combined volume of government textbook printing in India runs to several hundred million copies annually, primarily on maplitho paper using web or sheetfed offset, saddle-stitched or perfect-bound depending on thickness.