What problem can heat cause when milling rice?

When milling rice, heat can cause grains to crack, which is a significant issue in the sake-making process. The milling process involves removing the outer layers of the rice grain, and excessive heat generated during this process can weaken the structural integrity of the grains. If the temperature rises too much, the rice can become brittle, leading to cracks. These cracks can disrupt the uniformity of the rice particles and affect the efficiency of the subsequent fermentation process.

Moreover, cracked grains can also lead to uneven gelatinization during steaming, impacting the overall quality of the sake produced. Maintaining the right temperature is critical for ensuring the rice is milled properly without compromising its quality, making this understanding essential for advanced sake professionals.