Abstract: A process for preparation of powder coatings on substrates comprising the following steps of a) applying a powder coating composition onto the substrate surface comprising 40 to 90 wt % of at least one epoxy resin having an epoxy equivalent weight in the range of 1000 to 5,000, 10 to 60 wt % of at least one cross-linking (curing) agent, 0.1 to 15 wt % of at least one inclusion catalyst and 0.01 to 40 wt % of at least one constituent selected from additives, pigments and/or fillers, the wt % based on the weight of the powder coating composition, b) fusing, melting and flowing out the particles of the powder coating composition under increased temperature to a molten coating, and c) curing the molten coating; the one-component stable powder coating forms smooth and up to fine texture coatings and has improved flow and eliminates post-cure edge cracking and has a high opacity, hardness and flexibility.