The following table shows some typical examples of how protein and ash
content relate to each other in wheat flour:
Ash Protein Wheat flour type
US German
~0.4% ~9% pastry flour 405
~0.55% ~11% all-purpose flour 550
~0.8% ~14% high gluten flour 812
~1% ~15% first clear flour 1050
light rye flour 960
rye flour 997
rye flour 1150
dark rye flour 1370
你那里550就是普通面粉里。如果是高筋粉就是812了。