Walk past a shiny sticker on a wall, scan it quickly, and boom — a problem starts growing quietly inside a phone. QR codes ...

And dual-color thermal stickers are more expensive again, but on the whole, ink is more expensive than paper, so thermal printing will usually work out as the more cost effective way of labelling.

You open a shipment from a brand you love, and the box feels flimsy. The printing’s smudged. Worst of all? A big green leaf logo claims “eco-friendly,” but you spot […] ...