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200pcs 1 inch X 3 inch Laboratory Grade Chromatography Paper Quantitative Filter Paper for Chemistry, Laboratories, Classroom, School, University, Student industrial_Aug2024_update just clean them with a200pcs 1 inch X 3 inch Laboratory Grade Chromatography Paper Quantitative Filter Paper for Chemistry, Laboratories, Classroom, School, University, Student Package: 200pcs 1inch X 3inch Laboratory Grade Chromatography Paper Quantitative Filter Paper Material: absorbent paper Size: approx 2. 8cm X 7. 5cm 1 inch X 3 inch Color: white as the picture show Laboratory grade chromatography test paper is made of premium material,for separating mixtures into