Packing Paper Grain Direction
For Packing Paper grain direction is always parallel to the horizon, or left to right. This is always the case regardless of the size of the roll.
To determine weather a roll is grain long or grain short you must compare the width of a roll to the distance around the cylinder, or circumference.
In almost every case a Packing Paper roll will be Grain Long.
There are a few instances where this is not the case. If a rolls width is less than the total distance around the roll, it would then be considered Grain Short.