In the modern poultry and egg packaging industry, traceability, branding, and food safety compliance are no longer optional—they are essential. One of the most critical steps in this chain is printing codes directly onto egg shells, including batch numbers, expiration dates, farm identifiers, and sometimes even branding elements.
But egg shells are one of the most challenging surfaces to print on: they are fragile, curved, porous, and often dusty or moist. Choosing the right coding technology is therefore not just a technical decision – it directly affects product quality, regulatory compliance, and operational efficiency.
This article explores how to choose the best printing code technology for egg shells, what factors matter most, and which industrial printing systems deliver the best long-term performance.
Consumers also want to know where their food came from, who is providing it and when it was produced.
Printing & marking legible and accurate information on products is an important requirement for any food manufacturer, as traceability becomes more common (and more often required) in the industry. When it comes to food safety, especially with eggs, clear codes for traceability and easy to read use-by date markings are critically important.
When coding on eggs, this task is particularly difficult due to the delicate, uneven nature of the shells. Inkjet printers are ideal for this requirement, as they spray food-safe ink from a small distance, without even touching the surface of the egg. This prevents some damage from unevenly sized or oriented eggs, but with rigid print heads, there still comes a loss of product due to shell breakage.
RNJet’s EP-6H+ Egg Printer solves this problem with its specially designed compensators on each print head which gently glide over unevenly sized or oriented eggshells, reducing loss of product to 0. With our USDA approved, food-grade ink, both customer and producer can rest easy knowing their product is fresh, local and safe.
RNJet EP-6H+ – Egg Shell Printer Machine
If a food safety issue arises, these codes allow rapid identification and recall of affected products.
Modern consumers prefer transparency. Clear printed codes on eggs communicate freshness and origin, building confidence in the brand.
Retailers and distributors rely on egg codes to manage inventory, reduce waste, and ensure proper rotation of stock.
Egg shells can crack under excessive pressure or incorrect handling. Any printing system must be non-contact or extremely gentle.
The round shape of eggs makes consistent print alignment difficult.
Egg shells absorb ink differently depending on humidity and shell composition, which can affect clarity.
Egg grading and packaging lines often process tens of thousands of eggs per hour, requiring extremely fast printing systems.
Any printing process must comply with food safety standards, using food-safe inks and clean application methods.
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RN Mark Inc. is an industrial inkjet printer manufacturer in Canada. For over 20 years we’ve had the pleasure of designing and providing affordable, high-performance, coders across the globe.
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