No. Proper food-grade egg ink stays on the outer shell surface and does not penetrate to the white or yolk. Egg shells are porous, which is exactly why only certified ink should be used.
The ink is designed to bond to the calcium surface and dry quickly, forming a stable mark that survives washing, refrigeration and transport without leaching inward.
This is the core safety point: using certified food-grade ink means the code is a surface mark only, keeping the edible egg fully protected.
Why SHICAI: Every SHICAI printer — including the Small Character Egg Printer — uses food-grade ink intended for direct food-contact surfaces, with batch records available on request.
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SHICAI supplies food-grade egg coding machines to poultry farms and packers across the US, UK, EU, Australia and worldwide. Every unit ships with food-grade ink documentation and 24-hour engineering support.
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