Leaded solder recommendation (China import?)

[lfldp]

SN100Cu0,7NiGe is lead free solder wire with nikiel and german but there is also another one called Sn100Ni+ that one have added only nikiel , does someone compared these two solder wires and can write there some opinions ? because ive heard Sn100Ni+ like this one https://www.conrad.pl/p/cyna-lutownicza-bezolowiowa-felder-loettechnik-iso-core-ultra-clear-sn100ni-5551941010-szpula-sn9925cu07ni005-0100-2226468 is good too

the one from link is completly colophony free formulated from syntetic resins same as solder flux most of syntetic resin based are very pleasant when inhalle

[lfldp]

sorry for my bad english ill try to explain deep

what i mean exactly is by soldering with lead-free type Sn99Ag0,3Cu0,7 usually i getting moustache from solder and to remove this effect i must add more externall flux to remove this but by soldering with SnCu0,7NiGe i dont getting this effect , if i slow down tip temperature a little i getting similiar effect to leadded soldering - didnt getting these moustaches and this is what i need exactly

is a whiskers https://www.google.com/search?q=lead+free+whiskers&tbm=isch&ved=2ahUKEwj9qfT8tcf0AhVw_SoKHRwDBHwQ2-cCegQIABAA&oq=lead+free+whiskers&gs_lcp=CgNpbWcQDDoHCCMQ7wMQJzoECAAQEzoICAAQCBAeEBM6BggAEAgQHlCzB1jiEGDzHWgAcAB4AIAB1wGIAfgFkgEFOC4wLjGYAQCgAQGqAQtnd3Mtd2l6LWltZ8ABAQ&sclient=img&ei=ZPGpYf3nI_D6qwGchpDgBw&bih=912&biw=1920#imgrc=hlbUoDbXdowTrM

and these whiskers are eliminated by nikiel+german added to solder wire so this is big difference beetwen common lead-free solder deffect

[tooki]

Tin whiskers have not proven to be the problem they were predicted to be. They apparently almost entirely come from pure (100%) tin plating, not from solder.

What do you mean by a mustaches? We don’t use that term regarding soldering.

[lfldp]

Tin whiskers have not proven to be the problem they were predicted to be. They apparently almost entirely come from pure (100%) tin plating, not from solder.

What do you mean by a mustaches? We don’t use that term regarding soldering.

tin whiskers means when you soldering with SAC305 or another lead-free with solder iron usually you get effect like on this photo:
https://oscarliang.com/ctt/uploads/2017/07/solder-lead-lead-free-60-40-differences-3.jpg

after that you need add flux and heat again to remove this bad effect , but with SnCu0,7NiGe soldering you wont getting same problems , you dont need  to add any other flux to fix lead free soldering effect so this is quite difference and SnCu0,7NiGe it not works exactly like leadded alloy but much more better than usuall lead-free alloys

another question is how this soldering wire works Sn100Ni+ by comparing to SnCu0,7NiGe

[TomS_]

Hmmm no. This is not tin whiskers. Just dodgy soldering. :-)

Tin whiskers are extremely fine metallic growths which, in the wrong circumstances, could cause a short from the pin which they grow to an adjacent pin. Or if they become detached could be blown around by air movement and short some other pins elsewhere.

At a previous company that I worked at we were even requested to inspect the underside of (raised) floor tiles in some certain telecommunications facilities that we were based in to look for tell tale signs that the floor tiles may pose a tin whisker hazard to our equipment.

[magic]

Hmmm no. This is not tin whiskers. Just dodgy soldering. :-)

Specifically, it looks like inadequate technique for noneutectic alloy
And more specifically, manipulating such alloy in its intermediate phase.

BTW, the saving grace of noneutectic lead-free solder is that the intermediate phase behaves like a paste, which makes it very easy to remove

[lfldp]

Hmmm no. This is not tin whiskers. Just dodgy soldering. :-)

Tin whiskers are extremely fine metallic growths which, in the wrong circumstances, could cause a short from the pin which they grow to an adjacent pin. Or if they become detached could be blown around by air movement and short some other pins elsewhere.

At a previous company that I worked at we were even requested to inspect the underside of (raised) floor tiles in some certain telecommunications facilities that we were based in to look for tell tale signs that the floor tiles may pose a tin whisker hazard to our equipment.

ok i understand

[tooki]

Tin whiskers have not proven to be the problem they were predicted to be. They apparently almost entirely come from pure (100%) tin plating, not from solder.

What do you mean by a mustaches? We don’t use that term regarding soldering.

tin whiskers means when you soldering with SAC305 or another lead-free with solder iron usually you get effect like on this photo:
https://oscarliang.com/ctt/uploads/2017/07/solder-lead-lead-free-60-40-differences-3.jpg

after that you need add flux and heat again to remove this bad effect , but with SnCu0,7NiGe soldering you wont getting same problems , you dont need  to add any other flux to fix lead free soldering effect so this is quite difference and SnCu0,7NiGe it not works exactly like leadded alloy but much more better than usuall lead-free alloys

another question is how this soldering wire works Sn100Ni+ by comparing to SnCu0,7NiGe

Yeah, something is getting lost in translation here, because that’s got nothing to do with tin whiskers. (Google the phrase “tin whiskers” to see what it actually means in English.)

And I agree that the photo doesn’t show anything other than bad technique. That has little to do with the alloy.

[strawberry]

Made in Poland
https://www.cynel.com.pl/en/products?type=solder-wires
https://www.elektronik.micros.pl/led-stop-lutowniczy-%C3%B81,00mm-250g-6040-3198.html

[Steffalompen]

i am sure in near future they finally find 100% equal solution to eliminate this poison from soldering products

It continues to amaze me, the too common faith that some future technology will make a perfect substitute, even of chemical elements (and simple alloys thereof), without some other complication arising.