Drag soldering SMD parts with a flux pen

This video shows how to drag solder SMD parts with a high density package (in this video a Xilinx XC9572XL with VQFP 64 pin package is used). The board shown has an ENIG finish which makes the surface more smooth and equal, and is more easy to solder. The soldering iron is a Weller WTCP-S set. The Weller soldering iron tip used has a value of 7.