Epiphany blessing of homes

In Paul Turner's Blog by Paul Turner

Q: A question has come up among our parish priests:

If chalk is blessed for the Epiphany blessing of homes, what should happen to the chalk afterward?

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A: I don’t know of any clear directives on it. The purpose of the blessing is for the sacredness of the marks that will go above the door. After that, it’s probably OK to use the chalk in other ways, excluding anything ignoble.