Lou, In my experience with soldering PCB's, the important factor is not the soldering iron temperature but how long the operator spends on the PCB to make a satisfactory solder joint. IMHO, in order not to damage the laminate or component, the operator should not spend more than 3 to 5 seconds to make an acceptable solder joint. If this is not the case, than there could be several problems with the soldering operation including, but not excluding, iron temperature, iron wattage, solder tip design, technique and board design. Larry Tawyea