我可不会把这叫做“工程师指南”。这就是个德国人用公制单位写的外行入门手册。如果真想要工程级别的科学专业度，去看 Michel Suas 写的《Advanced Bread and Pastry》（高级面包与西点）。比如，我们自己磨面粉，筛掉麸皮但保留新鲜胚芽，做出来的风味差别堪称惊艳。不过，面包粉是需要陈化的，否则烤出来的面包…
I wouldn't call this "An engineer's guide". It's a lay guide written by a German using metric. If one wants an engineering level of scientific expertise, look at "Advanced Bread and Pastry" by Michel Suas. For example, we grind our own flour, sieving out the bran but including fresh germ, for a spectacular difference in flavor. However, bread flour needs to be aged, or else the loaves…
致点踩的各位：烦请去翻翻 Michel Suas 的经典教材《Advanced Bread and Pastry》第 6 章“Flour Technology and Dough Conditioners”（面粉技术与面团改良剂）。或者去看一下你当地面粉厂家的 Technical Data Sheet（技术数据表），你会发现里面有烟酸、某种复合铁、硝酸硫胺素、核黄素和叶酸等添加剂。
To the downvoters: please review e.g. Ch. 6: "Flour Technology and Dough Conditioners" of Michel Suas' classic textbook "Advanced Bread and Pastry". Or check the Technical Data Sheet of your local flour producer, you will find i.a. niacin, iron in some complex, thiamin mononitrate, riboflavin and folic acid additives.
我可不会把这叫做“工程师指南”。这就是个德国人用公制单位写的外行入门手册。如果真想要工程级别的科学专业度，去看 Michel Suas 写的《Advanced Bread and Pastry》（高级面包与西点）。比如，我们自己磨面粉，筛掉麸皮但保留新鲜胚芽，做出来的风味差别堪称惊艳。不过，面包粉是需要陈化的，否则烤出来的面包…
I wouldn't call this "An engineer's guide". It's a lay guide written by a German using metric. If one wants an engineering level of scientific expertise, look at "Advanced Bread and Pastry" by Michel Suas. For example, we grind our own flour, sieving out the bran but including fresh germ, for a spectacular difference in flavor. However, bread flour needs to be aged, or else the loaves…
致点踩的各位：烦请去翻翻 Michel Suas 的经典教材《Advanced Bread and Pastry》第 6 章“Flour Technology and Dough Conditioners”（面粉技术与面团改良剂）。或者去看一下你当地面粉厂家的 Technical Data Sheet（技术数据表），你会发现里面有烟酸、某种复合铁、硝酸硫胺素、核黄素和叶酸等添加剂。
To the downvoters: please review e.g. Ch. 6: "Flour Technology and Dough Conditioners" of Michel Suas' classic textbook "Advanced Bread and Pastry". Or check the Technical Data Sheet of your local flour producer, you will find i.a. niacin, iron in some complex, thiamin mononitrate, riboflavin and folic acid additives.