Qualitative filter paper is a commonly used material in chemical laboratories. It is mainly used to filter precipitates and suspended solids. So there are countless small holes on the surface for liquid particles to pass through, but larger solid particles cannot pass through. 

* Material: These qualitative filter paper are made from cellulose fibers,they provide the necessary strength and porosity for effective filtration 

* Thinner filter paper: Paper loose, with liquid absorption performance. tougher material, no worry about the filter paper breaking during operation. 

* High retentivity: perfect for general laboratory filtering and qualitative analysis. 

* Coarse Retention: Collect large particulate in fast moving air or fumes, capable of retaining the fine precipitates encountered in chemical analysis. 

* Ash content: ≤0.15%,low ash content,is typically used for most experiments