{"content":[{"text":"Given how soft this material is, using a standard deburring tool doesn’t work well. \n It tends to bend the stock before it can smooth the edge. \n My solution was inspired by “flame polishing.” This trick lets me transform the cut \n edges of a piece of thick acrylic into a smooth and clear surface. It does this by \n reflowing the plastic and allowing surface tension to do the rest.","bbox":{"left":0.117686,"top":0.088783,"width":0.762603,"height":0.105011}},{"text":"Oh yes, back to jagged aluminum.","bbox":{"left":0.117686,"top":0.210752,"width":0.31317,"height":0.023648000000000002}},{"text":"Using a MAPP torch, I heat up the edge until it starts to discolor. This takes less \n than a second, so I have to move fast. Those sharp edges and needles melt first. \n They don’t go away but, instead, turn into harmless tiny balls.","bbox":{"left":0.117686,"top":0.373366,"width":0.732774,"height":0.06425400000000003}},{"text":"If it wasn’t for the discoloration, I can’t tell which edges have been flame \n deburred. But when I gingerly run my finger along the edge, it becomes painfully \n obvious.","bbox":{"left":0.117686,"top":0.45473,"width":0.744392,"height":0.06425399999999998}},{"text":"I welcome your comments and questions.","bbox":{"left":0.117686,"top":0.597028,"width":0.379837,"height":0.023648000000000002}},{"text":"If you want me to contact you each time I publish an article, email me with \n “Subscribe” in the subject line. In the body of the email, please tell me if you are \n interested in metalworking, software plus electronics, kayaking, and/or the Lectric \n XP eBike so I can put you on the right distribution list.","bbox":{"left":0.117686,"top":0.637634,"width":0.75344,"height":0.084708}},{"text":"If you are on a list and have had enough, email me “Unsubscribe” in the subject \n line. No hard feelings.","bbox":{"left":0.117686,"top":0.73949,"width":0.7255370000000001,"height":0.04395100000000007}},{"text":"Rick Sparber \n Rgsparber.ha@gmail.com \n Rick.Sparber.org","bbox":{"left":0.117686,"top":0.800399,"width":0.23966699999999996,"height":0.06440500000000005}},{"text":"R. G. Sparber","bbox":{"left":0.117686,"top":0.92933,"width":0.100446,"height":0.017279000000000044}},{"text":"July 7, 2021","bbox":{"left":0.45616,"top":0.92933,"width":0.08780199999999994,"height":0.017279000000000044}},{"text":"Page 2 of 2","bbox":{"left":0.797418,"top":0.92933,"width":0.08336299999999996,"height":0.017279000000000044}}],"images_bbox":[{"left":0.117974,"top":0.264015,"width":0.798039,"height":0.098295}],"images_bbox_not_text_overlap":[{"left":0.117974,"top":0.264015,"width":0.798039,"height":0.098295}]}