Why does black paint appear after some insulating paint has been immersed in the latitude belt?
The tapeless resin does not react with the 1140 insulating paint. Even if it reacts, it should show agglomeration or degumming. Coking may not occur. The phenomenon of coke-black phenomenon is generally caused by local overheating caused by too close distance between the workpiece and the grate (heating tube) during baking.