Cardboard in a dream is a warning against excessive openness. Be careful, because someone may try to use your good heart.
make a cardboard box - you impose too many responsibilities on yourself, which makes you feel more and more limited and enslaved
cut something in the cardboard - someone's feelings are dishonest
corrugated board - you will get into a stormy conflict with a co-worker or with someone from the family
white cardboard - a sign that when you find in need you will get the help and advice you need.
cardboard characters - you will be forced to do unpleasant duties.
More dream interpretation: