A jar that did not seal

Check at the right time

Seals are checked after the jars have cooled, not while they are still warm, because a lid that has not finished pulling down looks like a failed one. Checking too early produces false failures and a reflex to reprocess batches that were fine.

The two honest options

• Refrigerate it and treat it as a short-life product. Simplest, and it keeps the jar out of the shelf-stable line entirely.
• Reprocess it promptly, with a new lid. Reprocessing costs texture, which is the trade.

What is not on the list is shipping it and hoping, or setting it aside to decide later. An unsealed jar left at room temperature is not a jar whose status can be re-established the next morning by looking at it.

Why it matters more commercially than at home

At home an unsealed jar is dinner. In a commercial operation it is a jar that can get into a case, and the control that prevents it is procedural rather than attentional: seals checked at a defined point, failures physically separated from the pack-out, and a written rule about what happens to them. A reflex is not a control.

A recurring seal problem is also telling you something upstream, usually about headspace, rim cleanliness or lid handling. One failed jar in a run is ordinary; a pattern is a process to look at rather than a pile of jars to reprocess.

Reprocessing is not free

The second option costs texture, and on a product whose whole appeal is crispness that is a real price. A reprocessed jar is a second-quality jar even when it is a safe one, which is worth knowing before it goes into a case alongside the rest of the run. Some makers refrigerate every failure rather than reprocess for exactly this reason, and treat the short-life jars as staff stock or market samples rather than inventory.

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