Give the cardboard two or three coats of varnish to harden it.
⇑ Translate the sentence above by Google ⇑
Related: cardboard
Prev: The NFL charged fans$ 100 for each cardboard cutout at the game. That's a cool$ 3 million in revenue to make up for some of the lost ticket and concession sales.
Next: This heated air, drawn down from the roof, then mixes with the greenhouse air as it reaches a second sea-water-moistened cardboard wall at the back of the greenhouse.
