What will happen to a toasted bread and keep it for week?

Toasted bread will not last a week, even if you keep it in a sealed container. Here's what will happen:

* Staling: The process of toasting makes bread dry and crisp. This dryness is what gives it its characteristic texture, but also means it will rapidly become stale. Staling involves a process where the starch molecules in the bread re-arrange themselves, making the bread feel hard and crumbly.

* Mold Growth: Even if you keep the bread in a sealed container, the moisture left in the bread can attract mold. Mold spores are everywhere, and can easily grow on a stale, moist environment.

Here's a breakdown of what you can expect:

* Day 1-2: The toast will be crispy and flavorful.

* Day 3-4: The toast will start to soften and become less crispy.

* Day 5-7: The toast will be very stale, hard, and likely have mold growing on it.

To make your toast last longer:

* Freeze it: Freezing your toast after toasting it can slow down the staling process. It can be kept in the freezer for a few months.

* Keep it fresh: Keep your toast in an airtight container at room temperature. This will slow down the staling process, but won't stop it completely.

It's best to eat toasted bread within a day or two for optimal freshness and texture.