Quick Answer
Cold water is not the most effective method for leaching acorn tannins. It may help to some extent, but the process can be time-consuming and may not remove all tannins. Hot water, on the other hand, has been a traditional method for leaching acorns.
Traditional Leaching Method
Hot water is a more effective method for leaching acorn tannins. This involves submerging the acorns in boiling water, then letting them sit for 10-15 minutes to allow the tannins to leach out. After the soaking period, the acorns should be drained and rinsed with cold water to stop the cooking process.
Alternative Leaching Method Using Cold Water
While hot water is more effective, cold water can be used as an alternative. To leach acorn tannins using cold water, the acorns should be soaked in water for several days or even weeks. A ratio of 1 part acorns to 10 parts water is recommended, and the mixture should be stirred daily to help the tannins leach out. This process can take anywhere from 3-14 days, depending on the desired level of tannin removal.
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