This serialized paper, going on from an IMRET 6 paper [1], describes from a technical point of view further application progress of microreaction technology (MRT) in the field of azo-chemistry at Clariant. Reproducibility of MRT-lab data in the MRT-pilot plant, which includes a numbering-up concept, was confirmed for a second MRT-pigment. Screening tests of commercially available microdevices disclose a need of further improvement of them. Additionally, first experimental data of an on-line process-control prove that a so-called multi-scale approach [2], which means integration of microdevices in conventional equipment, is a promising and successful way for a broader application of MRT in industrial applications. (C) 2003 Elsevier B.V. All rights reserved.