At present, many manufacturers in the food, pharmaceutical, and daily‑chemical industries still rely on traditional thermal inkjet coders—also known as ribbon coders—to print packaging dates.

　　Although common thermal coding machines are inexpensive to purchase, they can quietly drive up hidden costs and even result in losses for manufacturers. If you’re using a thermal coder, you’ve likely encountered the following issues.

　　01. Character-Grid Typesetting

　　A thermal coding machine prints dates by embossing copper type, which means operators must manually reset the type every day, ensuring consistent character height and preventing slanting. This process is labor‑intensive and time‑consuming.

　　Typesetting is performed daily, and errors are almost inevitable. For example, “01” might be misprinted as “10,” or the digits “06” and “09” could be reversed, instantly shifting the printed date by several months. Even worse, with prolonged use, the print head’s ink deposits can leave stubborn, indelible smudges on the typefaces, making the numbers or text difficult to read and significantly increasing the likelihood of typesetting mistakes.

　　A minor typesetting error can impose immeasurable losses on manufacturers—covering costs such as product recalls, invalidated packaging, and write‑offs of inventory. Although date printing is just one small step in the production process, its importance should never be underestimated. A single mistake can result in both time and financial losses for the manufacturer.

　　02. Preheating and Waiting

　　Hot‑stamping printers use high‑temperature embossing technology, so they must be preheated before use. This means that each time production begins, you have to wait for more than ten minutes. Insufficient preheating or excessive temperature can both result in unclear printing.

　　Hot‑stamping printers use high‑temperature embossing technology, so they must be preheated before use. This means that each time production begins, you have to wait for more than ten minutes. Insufficient preheating or excessive temperature can both result in unclear printing.

　　03. Print quality is inconsistent

　　Aside from temperature, printing pressure also affects print quality. Thermal coding machines require manual pressure adjustment—neither too high nor too low. Excessive pressure can cause the ribbon to break or puncture the packaging material, while insufficient pressure results in unclear prints. Over time, this leads to inconsistent print quality that is difficult to control.

　　It can be said that hot‑stamping coding is a relatively old marking technology. As we have seen from the foregoing review, these issues are, at their core, legacy challenges arising from the transition of older technologies into the modern era.