A method for forming fluted filtration media comprising: fluting filtration media to provide fluted filtration media having a repeating pattern of flutes wherein the repeating pattern of flutes comprises at least one flute having at least one ridge provided in a flute period between adjacent same side peaks ; wherein at least one of said flutes has a change in cross-sectional area along its length, and wherein the repeating pattern of flutes are arranged so as to result in substantially equal arc lengths along the length of the media ; wherein the process comprises feeding the filtration media into a bite formed between a first roll and a second roll to form the fluted filtration media ; wherein the first roll comprises a plurality of first roll projections and a plurality of first roll recesses wherein the first roll provides alternating first roll projection and first roll recess , and wherein at least one of the first roll projections comprises at least two media contact areas separated by a media relaxation area (270, 272; 280, 282; 322, 324), wherein the media has a degree of freedom of movement in the media relaxation area (270, 272; 280, 282; 322, 324); wherein the second roll comprises a plurality of second roll recesses and a plurality of second roll projections wherein the second roll provides alternating second roll recess and second roll projection , and wherein at least one of the second roll recesses includes at least two media contact areas separated by a media relaxation area (270, 272; 280, 282; 322, 324), wherein the media has a degree of freedom of movement in the media relaxation area (270, 272; 280, 282; 322, 324); and wherein a ridge in the filtration media is provided as a result of compression between a first roll projection media contact area and a second roll recess media contact area . fluting filtration media to provide fluted filtration media having a repeating pattern of flutes wherein the repeating pattern of flutes comprises at least one flute having at least one ridge provided in a flute period between adjacent same side peaks ; wherein at least one of said flutes has a change in cross-sectional area along its length, and wherein the repeating pattern of flutes are arranged so as to result in substantially equal arc lengths along the length of the media ; wherein the process comprises feeding the filtration media into a bite formed between a first roll and a second roll to form the fluted filtration media ; wherein the first roll comprises a plurality of first roll projections and a plurality of first roll recesses wherein the first roll provides alternating first roll projection and first roll recess , and wherein at least one of the first roll projections comprises at least two media contact areas separated by a media relaxation area (270, 272; 280, 282; 322, 324), wherein the media has a degree of freedom of movement in the media relaxation area (270, 272; 280, 282; 322, 324); wherein the second roll comprises a plurality of second roll recesses and a plurality of second roll projections wherein the second roll provides alternating second roll recess and second roll projection , and wherein at least one of the second roll recesses includes at least two media contact areas separated by a media relaxation area (270, 272; 280, 282; 322, 324), wherein the media has a degree of freedom of movement in the media relaxation area (270, 272; 280, 282; 322, 324); and wherein a ridge in the filtration media is provided as a result of compression between a first roll projection media contact area and a second roll recess media contact area . <EOS>