1. Flex PCB Soldering Correct Temperature The general rule is that you should never use rigid PCB temperature profiles to reflow flex PCBs.
Designing a Rigid-Flex PCB in Altium Designer
PCB Soldering:SMT vs Through-Hole
How's my soldering? : r/AskElectronics
HOW DOES THE RESIDUE IMPACT PCBA RELIABILITY?
10 Guidelines to Help You Successfully Flex PCB Soldering
Flex Circuit or Cable?
10 Guidelines to Help You Successfully Flex PCB Soldering
PCB Soldering:SMT vs Through-Hole
Rigid-Flex PCB - PCB Prototype the Easy Way - PCBWay
Successful Flex Circuit Design Guidelines
Basics of how to solder circuit boards