This note calculates the effect of vacuum fluctuations on spin spin fine structure using the results of UFT394. After checking the hand calculations with computer algebra some very interesting graphics can be drawn of the interaction energy on the classical level. The total interaction energy being the sum of the dipole and contact terms. Various well known quantization schemes of spin spin spectra can also be utilized to investigate the effect of the vacuum. The scheme used in this note is the well known one of aligning the spins in the Z axis. What is actually observed in fine structure must already incorporate the effect of the ubiquitous vacuum. So it is possible in theory to find the vacuum fluctuations experimentally from spectral analysis. This is true for all physics. What is actually observed experimentally must always contain a contribution from the vacuum, as in the anomalous g factor of the electron and the Lamb shift.