noun, noun or participle which takes 'suru'
removing astringency; deastringency treatment
Specifically refers to the process of removing the bitter, puckery taste from persimmons, often by drying, soaking in alcohol, or other methods.
渋柿は渋抜きをしないと食べられない。
Astringent persimmons cannot be eaten without removing the astringency.
この柿はもう渋抜きしてあるから
These persimmons have already been treated to remove the astringency, so you can eat them as they are.