When I first started tinkering about with electronics stuff I bought the "value" packs of everything thinking they were all good buys. As you will all know.....I was wrong! Most of it was junk!
Anyways..... on to the braids.
I bought one of the 5 rolls of braid for £5 or whatever it was. Maybe even less expensive I can't remember. I watched a few YouTube videos on how to de-solder using the braid then tried some myself. What a let down! Along the way a bit I learned about flux and different melting temperatures and the importance of decent tools etc etc etc.
I got some decent braid and fluxes and started experimenting. Now I can de-solder with the decent braid and I can even get the cheap stuff to work all be it with loads more effort and flux!
I would say to any beginners looking to get some braid to just buy decent stuff to start with and save yourself the grief. The stuff I am calling decent is only 4 or 5 quid a roll so not really expensive unless your going to be doing loads of de-soldering, in which case you need a de-soldering station and that's a whole other post!
Chemtronics is the stuff I went with and will stick with now and just use the cheap stuff where I need to get some heavier solder joints cleaned out. I've found the cheap stuff is so so if you brush some flux over it before use but that can be a PITA compared to the Chemtronics stuff that just works right off the reel.
I hope this saves someone the PITA I had finding this out!