See the difference between soldering paste and resin. Soldering paste makes iron solder, not resin.

[sebastian]

I used rosin (colophony) and soldering paste (many types) since 1985 when I first used a soldering gun. The role of those is to clean the surfaces to be soldered and to improve the flow of soldering alloy. I always use SnPb 60/40 alloy.
Both, the rosin and any soldering paste are acidic, the rosin being the less acidic in my experience. The fumes from rosin may produce asthma if breathe for long time, but they smell well (kinda like pine) and are easy to breathe. The fumes from soldering paste are heavy and hard to breathe, I do not know what disease they give, but they are very irritant. As soldering aide (flux), I find rosin better to use, with soldering gun and soldering iron, the soldering paste is not so good to use with soldering iron at high, it evaporates too quickly with a lot of fumes.
The traces of rosin left on the solder joint, are not affecting the copper on the PCB if they are left, but the soldering paste is way more corrosive and in time they will "eat" the copper traces.
My preffered is rosin, liquid flux and soldering paste, in this order. I mostly use rosin in microsoldering disolved in >96% alcohool.

[MiharuNV]

Rosin is still one of the best fluxes for soldering. I use it as a solution dissolved in alcohol. After soldering, it is not sticky and can be easily removed with the same alcohol or isopropanol.
And it is the only flux with nice smell.

[dinoproductions]

rosin is better for electronics
this paste is acid and it's corrosive so it's not used in electronics

[Techo_Explorer]

The amount of heat provided to the rosin flux from the soldering iron is not the same as with the "soldaring past".

[SixDasher]

When a plumber thinks he can solder electronics

[Kostynlhcz]

Зачем вводить в заблуждение, не прогревает место пайки, от того и не припоялось

[littlebritain]

Is it possible that the white stuff on the left side is to be avoided in electronics because it can eat the copper tracks on pcbs? And it should be used only in plumbery soldering works?
I always used 60/40 soldering wire, very often with rosin core already inside.
Rosin helps to melt soldering wire better and have a shiny perfect contact between electronic components.

[sivarvl]

Whichever of these two we use will be useful for us

[SuTiyah-pflj]

tidak bgitu juga
smua ada tingkatan panasnya.
klo solder tongkat panas renda juga ndak nempel. 🙏

[ZARUS]

Ха, что тут сравнивать, разные металы разные виды паяльных средств, для меди подойдет канифоль сосновая, для металлов как на ноже кислота но ее надо смывать обязательно после припоя.

[darbyjohnluke]

"Sold a ring" in the "past"😂

[Farquardi]

Estou com problemas de soldar pois a formação de bolinhas e não cruda... Já passei tudo isso e não funciona. A temperatura do ferro de soldar é o problema? Qual a potência correta? 60w 70w??? Qual?

[iambenmitchell]

The guy is using an 18650 battery to support his soldering iron 😂 don’t take advice from here

[dkyadav]

Black around the after soldering is not good looking in Rosina Core Soldering wire .
Rosin ke saath kiya gaya soldering pcb thora dikhne me ganda dikhta hai, aur isme ek aur process "Cleaning" aur material lagta hai .

[heisenberg]

Soldering past ? Can it fix my mistakes ...

[Thechandran]

Hi nice video can you send link to buy the paste

[catfood]

Both of them are cold solders. Also rosin solder dont need flux unless your wires are contaminated.

[Zaqkashimoto]

I do my soldering without both and it's all okay - 29yrs

[mufidmosh]

i make flux from : citric acid, salt and water?

[battano]

The issue is paste takes more heat and more likely to leave cold shunts in the weld if it does not get that heat