About one year ago the book “Chemical Micro Process Engineering – Fundamentals, Modelling, and Reactions” was released by the author team Hessel, Hardt and Löwe. It described the fundamentals of the new technology and presented in detail applications concerning organic and inorganic reactions as well as gas-phase reactions. Thus, it provided insights for the readers how mature are today’s micro reactors for real-world applications. What was missing is the processing before and after such experiments