how to destarch a leaf
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Place the leaf in boiling water for 30 seconds – this kills it, stopping any further chemical reactions. Place the leaf in boiling ethanol – removes the chlorophyll making the leaf paler in colour. Dip the leaf in water – this softens it.
Answer:
Individual leaves on large plants can be de-starched by covering with a black bag to exclude all light. Leaves can also be de-starched by depriving them of carbon dioxide for about 24-48 hours - N.B. the time varies depending on the type of plant and its size.