18 דקות לאסון: המדע של חמץ

The chametz prohibition is a precise biochemical process.

Biology

When water touches grain, enzymes activate and release carbon dioxide.

The 18-Minute Rule

After 18 minutes, the fermentation process becomes irreversible.

The Power of Motion

Constant kneading suppresses enzymes. Matzah bakeries work at a frantic pace.