My grandfather who learned electronics work in the USSR worked with solid rosin. When you touch the iron with the rosin, it starts smoking like incense at a c

My grandfather who learned electronics work in the USSR worked with solid rosin. When you touch the iron with the rosin, it starts smoking like incense at a church (same stuff actually), but a small amount remains on the tip. You transfer this to the contact you’re soldering, dip into the rosin again, and then solder as usual.