Are eggs with printed wording on them a problem as the ink may be wheat based?
The ink used to print on eggs is made from two components, a colouring agent and the solvent. The colouring agent is purely synthetic and does not present a problem for Passover. The solvents most commonly employed are isopropanol, ethanol or a combination of both. The solvent is of such nature, that within a fraction of a second after applying the stamp, it completely evaporates. A moist stamp would lead to unwanted smudges. It is therefore very safe to assume, that not a trace of solvent remains within a short time of application to the egg. To sum up: It is not certain if ethanol is used in stamping eggs. Even if ethanol is used, it is not certain that it is wheat derived. Even if wheat derived ethanol was used, none of it remains after the ink has dried and it no longer constitutes part of the ink.
