A method of producing a corrugated product, comprising the steps of: providing a pair of corrugating rollers that cooperate to define, at a nip therebetween, a corrugating labyrinth between respective and interlocking pluralities of corrugating teeth provided on said corrugating rollers; providing a medium conditioning apparatus upstream of said corrugating rollers; providing a heating arrangement; the method being characterized in that the heating arrangement is downstream of said medium conditioning apparatus and upstream of said corrugating labyrinth; the method being characterized in that it further comprises: feeding a web of medium material along a web pathway through said medium conditioning apparatus to adjust the moisture content in said web of medium material to be in the range of 6-9 wt.% moisture by applying a substantially continuous first thin film of liquid to an exposed surface of the web of medium material using said medium conditioning apparatus, wherein said first thin film of liquid comprises water and adhesive; subsequently feeding said web of medium material through said heating arrangement to heat said web of medium material via transfer of thermal energy from said heating arrangement to a temperature less than or equal to about 100° Celsius, and subsequently feeding said web of medium material through said corrugating labyrinth, said exposed surface of the web of medium material remaining exposed in said corrugating labyrinth, wherein said web of medium material retains 6-9 wt.% moisture, and is at a temperature less than or equal to about 100°C, immediately prior to entering said corrugating labyrinth as a result of having had its moisture content adjusted in said medium conditioning apparatus. providing a pair of corrugating rollers that cooperate to define, at a nip therebetween, a corrugating labyrinth between respective and interlocking pluralities of corrugating teeth provided on said corrugating rollers; providing a medium conditioning apparatus upstream of said corrugating rollers; providing a heating arrangement; the method being characterized in that the heating arrangement is downstream of said medium conditioning apparatus and upstream of said corrugating labyrinth; the method being characterized in that it further comprises: feeding a web of medium material along a web pathway through said medium conditioning apparatus to adjust the moisture content in said web of medium material to be in the range of 6-9 wt.% moisture by applying a substantially continuous first thin film of liquid to an exposed surface of the web of medium material using said medium conditioning apparatus, wherein said first thin film of liquid comprises water and adhesive; subsequently feeding said web of medium material through said heating arrangement to heat said web of medium material via transfer of thermal energy from said heating arrangement to a temperature less than or equal to about 100° Celsius, and subsequently feeding said web of medium material through said corrugating labyrinth, said exposed surface of the web of medium material remaining exposed in said corrugating labyrinth, wherein said web of medium material retains 6-9 wt.% moisture, and is at a temperature less than or equal to about 100°C, immediately prior to entering said corrugating labyrinth as a result of having had its moisture content adjusted in said medium conditioning apparatus. feeding a web of medium material along a web pathway through said medium conditioning apparatus to adjust the moisture content in said web of medium material to be in the range of 6-9 wt.% moisture by applying a substantially continuous first thin film of liquid to an exposed surface of the web of medium material using said medium conditioning apparatus, wherein said first thin film of liquid comprises water and adhesive; subsequently feeding said web of medium material through said heating arrangement to heat said web of medium material via transfer of thermal energy from said heating arrangement to a temperature less than or equal to about 100° Celsius, and subsequently feeding said web of medium material through said corrugating labyrinth, said exposed surface of the web of medium material remaining exposed in said corrugating labyrinth, wherein said web of medium material retains 6-9 wt.% moisture, and is at a temperature less than or equal to about 100°C, immediately prior to entering said corrugating labyrinth as a result of having had its moisture content adjusted in said medium conditioning apparatus.