Here I copy a chemical way to remove the insulating layer of copper wire.
the recipe is Isoamyl acetate and Formic acid with a mass ratio of 1:5. To accelerate the process, the solution can be heated up to around 85 degrees. put the wire into the solution for 3 mins and then remove the covering layer (which is viscous-liquid).
tips: when heating up the solution, a layer of wax could put on top of it to stop the vaporing. store the solution in glass bottle. wear personal protective equipment.
在这里，我复制了一种化学方法来去除铜线的绝缘层。
配方为质量比为1：5的乙酸异戊酯和甲酸。 为了加速该过程，可以将溶液加热到大约85度。 将导线放入溶液中3分钟，然后去除覆盖层（粘稠液体）。
两种液体具有强烈的刺激性，一定要在通风的条件下操作。
提示：加热溶液时，可以在其上面放一层蜡以阻止蒸发。 将溶液储存在玻璃瓶中。 穿戴个人防护装备。