A full roll is very sturdy, while a mostly used roll is more fragile. Therefore, when you go to pull the paper off the full roll, it comes off easily without you having to steady the roll...but if you want to tear paper off a mostly used roll, you'll have to hold the roll down before you tear it off so the roll doesn't fall. Basically, because a full roll is sturdier than a mostly used roll.

Francisco Piniella Corbacho has written:

'Roll-on/roll-off' -- subject(s): Roll-on/roll-off ships

A roll off truck is one that is used to haul roll-off containers. A typical roll-off truck can be bought online from the Benlee website, and can be shipped from Cleveland or Detroit.

Roll on Roll off passenger ship.

The roll off in rock and roll dancing is when the lady spins out from a closed position to about a arms length away.