63/37 solder is sold with no clean flux core (https://www.amazon.com/MG-Chemicals-Leaded-Solder-Diameter/dp/B005T8NCP8/ref=asc_df_B005T8NCP8/?tag=hyprod-20&linkCode=df0&hvadid=312128028232&hvpos=1o4&hvnetw=g&hvrand=12337912308072241386&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=1024046&hvtargid=pla-423311596781&psc=1 ), so it must be OK.
I prefer rosin flux myself. It's trivial t clean it up.
For alcohol-based, rosin/resin free, one would need to know what agent(s) performed the functions of rosin or mildly activated rosin flux. Even then, compatibility would only be a guess.<excerpt>
Low-Solids/No-Clean fluxes breakdown into a few other categories:
[rare occasions will contain rosin or resin]
- Alcohol-based, Rosin or Resin Containing;
- Alcohol-based, Rosin or Resin Free;
- Water -based, Rosin or Resin Free (VOC-free);
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