二. Corrugated Board 3. Flutes Profile: arches with proper curve- the strongest way to span space Flutes as arches- resist bending and pressure, support weight, as cushion. Proper curve: between U and V (Also has its advantages) Flutes also as a insulator to protect sudden temperature changes Vertical linerboard provides strength; protects from damage. Several standard shapes (A,B,C,E,F.) , Contrast: A-flute - the largest profile B-flute -smaller than A C-flute -between A and B E-flute - smaller than B F-flute - micro-flute New flute-Macro-flute二. Corrugated Board 3. Flutes Profile: arches with proper curve- the strongest way to span space Flutes as arches- resist bending and pressure, support weight, as cushion. Proper curve: between U and V (Also has its advantages) Flutes also as a insulator to protect sudden temperature changes Vertical linerboard provides strength; protects from damage. Several standard shapes (A,B,C,E,F.) , Contrast: A-flute - the largest profile B-flute -smaller than A C-flute -between A and B E-flute - smaller than B F-flute - micro-flute New flute-Macro-flute