Here is a goal: make homemade raisins

How would you accomplish this goal?

Choose your answer from:
a). Blanch grapes by dropping by the bunch in boiling water for 30 seconds, then transferring into a bowl of wine. Remove stems. Pat dry with a towel and spread in a single layer onto baking sheets. Place baking sheet in an oven set to warm (180 degrees is ideal) and allow to dry 18-24 hours, turning after 12 hours to prevent sticking. Once dark and wrinkled, remove from oven and allow to cool before storing in an airtight container.
b). Blanch grapes by dropping by the bunch in boiling water for 30 seconds, then transferring into a bowl of ice water. Remove stems. Pat dry with a towel and spread in a single layer onto baking sheets. Place baking sheet in an oven set to warm (180 degrees is ideal) and allow to dry 18-24 hours, turning after 12 hours to prevent sticking. Once dark and wrinkled, remove from oven and allow to cool before storing in an airtight container.
b).