Summary of achievements of the European Metrology Research Programme Project “Implementing the new Kelvin” (InK 1)

We report a summary of the technical achievements of the European Metrology Research Programme Project (EMRP) “Implementing the new Kelvin” (InK 1). In short these are:
• The first determination of definitive thermodynamic temperatures for the point of inflection of the high temperature fixed points of Re-C, Pt-C and Co-C as well as a new evaluation of the Cu freezing point.
• The first trial of the new dissemination mechanisms for thermodynamic temperature at high temperatures, as described in the mise en pratique for the definition of the kelvin (MeP-K).
• A new ultra-low uncertainty thermodynamic evaluation of T − T90 from about 30 K to 303 K, with particular emphasis on temperatures around the water triple point (273.16 K).
• The first re-evaluation of T − T2000 from 0.02 K to about 1 K with an uncertainty of <1%.Taken together these results represent a significant advance in primary thermometry. We also give a brief introduction to the successor project (InK 2) and discuss the impact of this work on the kelvin redefinition and next version of the MeP-K (i.e. the MeP-K-19).