Centrifugal filters are used also to cleanse gums for varnishes.
"Scientific American Supplement, No. 613, October 1, 1887" by Various
She centrifuged, precipitated, filtered and stained over and over, using every qualitative procedure in the book.
"Mate in Two Moves" by Winston Marks
The first centrifugal filter is shown in British patent to Joshua Bates, No.
"The Progress of Invention in the Nineteenth Century." by Edward W. Byrn