Whenever and whatever content passes from it and falls into a beaker, a Beaker which is made up of public (which creates healthy society). It should be very pure and free from every type of impurities, impurities like favouritism, professional dishonesty, partiality, politically influenced, greediness, corruption and all such type of impurities.
Because with all these impurities the content become so acidic in nature, it can break the unity of molecules of beaker and later the time will come when beaker breaks into pieces and nothing will be left even that acidic content to be held.
Filter paper should be so strong that no such impurities mentioned above or its holder can able melt it, break it, burn it .It can only be achieved with high professional values and ethical principles.