Unsifted

If you bake with unsifted flour you don't know how much you are using because it might be packed down or very fluffy.

[…] You speak like a green girl, Unsifted in such perilous circumstance.

1765, George Colman, The Comedies of Terence, Translated into Familiar Blank Verse, London: T. Becket & P. A. De Hondt, 2nd edition, 1768, Volume I, Preface, p. xxxii, But each man’s understanding, such as it is, must be his guide; and he, who has not courage to make a free use of it, but obtrudes the opinions of others, unsifted and unexamined, on his readers, betrays more want of respect for their understanding, than diffidence of his own.