Multani mitti, meaning 'mud from Multan', is also popular as fuller's earth. - This light-coloured Multani Mitti clay is the result of decomposed volcanic ash. The name, Fuller's earth, comes from this clay's use in the early English wool industry. It was used by fullers to clean and degrease woolen cloth during the 'fulling' process, because of its ability to absorb oil.- Multani mitti can be a great asset to add to your beauty arsenal. Not only does it help get rid of dead skin cells, but it also imparts an instant glow onto your face. It does this by getting rid of all the impurities from your skin and by unclogging your pores.