Adjective : his astringent criticism. ,astringent wit.    From Dictionary.com. 

There are both astringent and non-astringent persimmons.    From Wordnik.com.  [Taste Test: Persimmon - Boing Boing] Reference

There are non-astringent Asian varieties, the Asian fruit is much larger and the trees are smaller and "easier to place," as he puts it.    From Wordnik.com.  [Chat Leftovers: Plant a persimmon -- but which one?] Reference

Use a non-astringent toner, or just skip it altogether.    From Wordnik.com.  [WebMD Health] Reference