1979
You would call strong cardboard 'cardboard'. It doesn't matter how strong it is, the cardboard is still cardboard. Even if the cardboard is extremely stiff, it is still cardboard, and there is no special name for it.
Yes, coated cardboard can be recycled, but it may require special processing to separate the coating from the cardboard fibers.
what is the manufacture date of a .38 police positive special serial number b 81
418306
1950
Made in 1951.
Colt police positive special was made in 1915
Animation greenscreen cardboard frogs makeup puppets rubber rabbit
1970
1960
1954
1952.