The Soldering Defect Database is a freely accessible resource from the National Physics Laboratory website:
This little known resource is a fully searchable database of soldering defects with pictures, and information about the causes and solutions of each problem. Once signed up not only is all the information available but the database can be added to with any findings a user wishes to add.
This is a truly a brilliant resource and I can’t think of how many occasions this could have been of use in the past. Have a look, get involved and make sure to pass it onto your colleagues.
Circuit Mechanix Apr-2017