A method for forming fluted filtration media (110, 120, 140) comprising: fluting filtration media (110, 120, 140) to provide fluted filtration media (110, 120, 140) 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 (115, 119); 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 (110, 120, 140); wherein the process comprises feeding the filtration media (110, 120, 140) into a bite formed between a first roll and a second roll to form the fluted filtration media (110, 120, 140); 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 (110, 120, 140) 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 (110, 120, 140) 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 (110, 120, 140) 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 (110, 120, 140) to provide fluted filtration media (110, 120, 140) 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 (115, 119); 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 (110, 120, 140); wherein the process comprises feeding the filtration media (110, 120, 140) into a bite formed between a first roll and a second roll to form the fluted filtration media (110, 120, 140); 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 (110, 120, 140) 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 (110, 120, 140) 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 (110, 120, 140) is provided as a result of compression between a first roll projection media contact area and a second roll recess media contact area.