Glass microfibre filters without binder for clarification of buffer, reagent and protein solutions, air monitoring, as well as gravimetric and wastewater analysis. They can also be used as a prefilter. The glass microfibre filters without binder are made of 100 % borosilicate, are highly pure and extremely white. They continue to perform over long periods unlike cellulose filters whose rate of filtration drops off rapidly as the particulate load increases.