A unit fuel injector is presented in which a valve member and an armature of a magnet valve are fixedly joined together, so that the dynamic performance of the magnet valve is improved, and the adjustment and calibration of the magnet valve are also simplified. 1-10% of an active wood treatment chemical, 50-99% of a microemulsion concentrate including: 0. Instrumentation consists of plate holders, a compression apparatus and a pilot hole forming device that interlocks with the plate.