Weird solder....kesterloy tinning solder

[snowman]

No numbers or other Id on it...just kesterloy tinning solder. Anybody have any clue? No noise when bending.

[Mohillbilly]

Kester made all kinds of solder .since it says tinning soder I would think 50-50 tin lead .....

[Full Mold Jack]

Way back when I was an apprentice plumber we used to file and re-tin our heavy copper soldering irons with what was called tinning solder while rubbing the iron on a block of Salammoniac (ammonium chloride).

I don't recall any percentages stamped on the the solder but do remember being told it had a high tin content. That really doesn't help you much I know but I would imagine you should be able to hear some cracking when bending it if it did have a high tin %