I have such problem with an old ussr solder, but it worked well at least a couple of years after it) I know that such problem is often occurs with cheap solders like those - https://www.bestadvisers.co.uk/soldering-iron

No image too

Very useful notes for both beginners and amateurs. I myself am not very experienced in the field of electronics, but I happened to encounter the need to learn this. I can only add a little more from myself about the workplace. What about the necessary tools - up there have been advised everything th...