What is #4 grade Cardboard?

I need to get some #4 recycled cardboard for a project that will hold weight



  1. 0 Votes

    Type four cardboard is also called “corrugated cardboard” and is very thick. 


  2. 0 Votes

    #4 grade cardboard or corrugated fiberboard, is a paper based material consisting of a fluted corrugated sheet and one or two flat liner-boards. It is widely used in the manufacture of corrugated boxes and shipping containers. Corrugated board is manufactured on large high precision machinery lines called corrugators, usually running at 500 lineal feet per minute. Packaging engineers design corrugated boxes to meet the particular needs of the product being shipped, the hazards of the shipping environment and the needs of retailers and consumers. 

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