What is corrugated ?

What is corrugated? Everybody's seen it... just think of pizza boxes, or the big boxes that hold new refrigerators and televisions. Corrugated is built like a sandwich - characteristic arches of wavy "fluting" lying between two pieces of smooth board on the outside. 

Corrugated boxes are easy to recognize. Corrugated is made of paper and has an arched layer, called "fluting," between smooth sheets, called "liner." The corrugated most commonly used to make boxes has one layer of fluting between two smooth sheets. But there are many types of corrugated available, each with different flute sizes and thicknesses. 

Corrugated is an extremely durable, versatile, economical and lightweight material used for custom-manufactured shipping containers, packaging and point-of-purchase displays, in addition to numerous non-traditional applications ranging from pallets to children's toys to furniture.


The first known corrugated material was patented for sweatband lining in tall hats of Victorian Englishmen. 
Unlined corrugated first appeared as a packaging material for glass and kerosene lamp chimneys. 
A liner was added to one side of the corrugated material to prevent the flutes from stretching. 
Corrugated was slotted and cut to make the first boxes. Wells Fargo began using corrugated boxes for small freight shipments. 
Corrugated was first approved as a valid shipping material and was used to ship cereals. 
Rubber printing plates were developed which allowed for greater design creativity. 
Tariffs imposed on corrugated shipping containers were ruled discriminatory. 
Flexographic printing virtually replaced letterpress and oil-based ink. 
The flexo folder-gluer was invented. 

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