Thermal inkjet, usually shortened to TIJ, uses a cartridge-based print head similar in principle to a desktop printer, but built for industrial coding speed. The result is a noticeably sharper, finer print than most other coding methods manage, which is exactly why it has found its place on packaging where small text and clean barcodes actually matter.

Cartons, labels, sachets and small bottles are where TIJ tends to shine, since the fine print quality holds up even at a small character size where other methods start to look blurry or uneven. A barcode or QR code printed by a TIJ system generally scans more reliably than one printed by a coarser method.

The appeal beyond print quality is practical too - no compressor is needed the way it is for continuous inkjet systems, maintenance stays minimal, and swapping a cartridge takes a couple of minutes with no special tools. In cleanliness-sensitive environments like pharma and food packing, that simplicity is a genuine advantage.

This is reflected in where TIJ has been adopted across India - pharma packing lines that need crisp, scannable codes, FMCG sachet units printing dense information on small pack sizes, and dairy cartons where both branding and code clarity matter to the buyer.

The one decision that needs care is picking the right cartridge ink type - water-based, solvent-based or oil-based - to suit the actual substrate being printed. Getting this wrong leads to smudging or poor adhesion, so it is worth testing on the real packaging material before placing a bulk cartridge order.