Why doesn't the tape trick work with scotch tape?

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The tape trick that works with packing tape fails with scotch tape due to its material properties. Scotch tape is more elastic and does not tear easily; instead, it snaps back to its original shape when pulled. Users noted that this resistance is likely due to the tape's thinner design and different adhesive characteristics. The discussion highlights the variability among different types of Scotch tape, as the brand offers numerous variations. Understanding these differences is crucial for successfully applying the tape trick.
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Mods, I know "General Engineering" hardly describes this question, but it doesn't seem to fit anywhere. Move it where you wish.

There's a trick that works with most tape (especially packing tape), where you fold the tape on itself, make a crease, then pull the creased tape apart quickly. The tape will tear neatly apart, and it spares you the effort of finding a pair of scissors. For a video demo, check out "method 3" of this video.

Today, I tried to show off to a coworker using this trick to tear scotch tape, and I made a big ol' fool out of myself. I know I can do it with most kinds of tape. What gives? Is scotch tape more elastic? Thinner? What parameters do you all think are critical? My dignity is at stake here :cry::oldbiggrin:
 
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Twigg said:
scotch tape
Could you please give more details? I could not find anything conclusive about the material or function of this particular tape type.
 
Also, 3M makes a zillion kinds of tape, all branded "Scotch".
 
Sorry about that. Should've known better than to post right before bed.

3/4 inch "Magic^TM Office Tape" under the Scotch brand.

What I observed was that the tape wouldn't tear, it wouldn't even plasticly stretch, it would just elastically snap back to its original shape and resist the pull.
 

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