I was following this yesterday and there seems to be very little commentary regarding the lack of damage to the table surface or the color staining to the scissor blades. This looks far more like someone blowtorching the blades while holding the scissors over the table (one presumes outside) to get some of the plastic to melt, then later placing the cooled scissors on the table and moving it inside. Classic Reddit runaway arguments with no consideration that the OP is pulling their leg.
Those scissors apparently have a habit of the handle melting away (see reviews): <a href="https://www.amazon.com/dp/B00SSVNNZC" rel="nofollow">https://www.amazon.com/dp/B00SSVNNZC</a><p>As one comment pointed out, they could be using nitrocellulose in the handle.
Anyone know what chemicals do they use to clean the screws on injection molding machines? Something that oxidizes plastic? The handles look like they were made in a 2-shot mold, hard plastic frame with soft plastic touch surfaces. If some cleaning chemicals got stuck between the shots they could eventually leak out and somehow start the exothermic reaction upon contact with air.<p>I have been to an injection molding shop a few times and it always seemed like a lot of labor was going in to cleaning the molds and the injection screws. Maybe a worker found a shortcut.
OT: I know people love to love the old Reddit, but the new UI moved away from React as is now a lot better for viewing galleries like this than the old one.<p><a href="https://www.reddit.com/r/chemistry/comments/1ilmshx/a_pair_of_scissors_sitting_on_my_table_formica/" rel="nofollow">https://www.reddit.com/r/chemistry/comments/1ilmshx/a_pair_o...</a>