Proofreading, Inspection and Repair

The obligation "A Torah scroll that has not been proofread may not be kept more than thirty days; rather one should repair it or set it aside" (Shulchan Arukh, Yoreh De'ah 279:1). The same passage warns: do not correct on the basis of reasoning, only on clear evidence of an error.

What is checked Maimonides lists twenty factors, each of which disqualifies a scroll — among them invalid parchment, processing without intent, writing without ruled lines, non-durable ink, a missing or extra letter (Mishneh Torah 10:1).

How it is done in practice Two layers are customary: proofreading by a trained human corrector, and computer checking that compares the text against an accurate version and flags omissions, additions and spelling variants. Computer checking does not replace the corrector — it directs him.

Care over the years A cracked or faded letter requires a scribe. A scroll in regular use deserves periodic inspection, and a stable, well-sealed case reduces exposure to humidity and light.

Note: Educational content. For a specific kashrut question, consult a rabbi and a scribe.