Introduction

In an article, Rabbi Gil Student writes that, on Shabbat:

The Mishnah Berurah (340:17) and other authorities ... permit eating cake with letters. However, they do not permit cutting letters on cake. Similarly, they forbid cutting through letters on a wrapper or piece of paper (e.g. Shemiras Shabbos Ke-Hilkhasah 9:12; R. Gersion Appel, Concise Code of Jewish Law, vol. 2, p. 199).

To peel a hard-boiled egg, I usually follow these steps:

• Crack it.



• Roll it on the table. (Some say that this helps to detach the membrane from the egg white. A column by the Life Hack Investigator says that the rolling technique is almost as good as the shake method. Both of the aforementioned techniques are more popular than the spoon method.)




• Remove the peel.

Where I live, many eggs have the best-before date printed on the shell. After boiling, the date marking fades but doesn't fully disappear.

Cracking and rolling the egg might be likely to tear the letters.

I'd rather not peel the egg before Shabbat and store it in a plastic bag. I bet the egg might stay fresh for more days if I keep it in its shell.

My question

Is it okay to crack and roll a boiled egg on Shabbat, even if the rolling will tear the letters printed on the egg?

Why I think it might be okay

• Maybe the final Halachic ruling is more lenient than we thought; please see Rabbi Student's full article.




• Also, maybe cracking and rolling isn't guaranteed to tear the letters; so maybe this changes things. But I currently don't have any boiled eggs handy in order to experiment with and find out.




• Finally, rolling an egg on a table isn't the usual way of erasing letters, so maybe the problem is reduced or eliminated.

Postscript

Instead of trusting the answers here, it's best to ask your own rabbi, for many reasons.

In the English version of Shemirath Shabbath k'Hilchata (11:10), R' Yehoshua Neuwirth is strict and writes:

When removing the shell from an egg, one should be careful not to
break through any letters or designs which may be stamped on it.

You might argue that, when rolling the egg, you don't want to break the letters, and you have no use for the peel. However, not all rabbis agree that such a case of "certain outcome one doesn't benefit from" (pesik reisha de-lo nicha leih) is permitted. So, as always here, ask your rabbi.

Regarding what to do with the shell, see "Peeling a Hardboiled Egg on Shabbat".