Thimble filters are used in soxhlet apparatus for dust sampling and for extracting soluble components using organic solvents. Thimbles are made of cellulose. Typical applications include analysis of fats, oils, grease, organics, pesticides, pollutants, and additives in plastic/rubber materials.

Cellulose thimbles are suitable for extraction of organic compounds and dust sampling. Lipid content is <0.1% by weight; thickness is 1.5 mm.