if u dont know things like this then u dont need to be making anything..i suggest u get some books and vids first it will save u money in the end as well as time..but burlap is needed or hemp to make it stronger and to keep it from breaking as easy if dropped..u could make the mold thicker but thats alot of plaster and it will be really heavy..if u making the master mold i stronger urge u to use it
