Which mineral additive?

Is   it   processing   parameters   or   more   special   functions   of   ready parts?   Is   pricing   very   crucial   or   do   you   need   to   fulfill   certain properties    mainly?    Are    locally    available    mineral    additives preferred or is high performance most important?

Availabilty and transportation ways

Both   geological   availability   and   distance   to   customer   are   most crucial   for   mineral   additive   prices.   Is   it   necessary   to   transport over   several   hundreds   of   kilometers   or   is   transport   done   by ship   anyway?   How   is   the   mining   volume   of   the   producer   and what    about    the    quality    of    the    raw    materials    in    his    mine generally?