text: This theory allows us to study the time evolution of the evaporating ﬁlm of nanoparticle suspension 
  
  without some of the restrictions of the kinetic Monte Carlo model. Here, however, we illustrate its 
  
  application in similar parameter regimes as used above for the KMC. We focus on two examples: 
  
  (i) the spinodal dewetting of a initially ﬂat ﬁlm of nanoparticle suspension characterised by con- 
  
  stant ρl and ρn (Fig. 4); and (ii) the retraction of a dewetting front that is unstable with respect to 
  
  a ﬁngering instability (Fig. 5). 
  
  Fig. 4 presents two pairs of snapshots from a purely evaporative dewetting process deep inside the 
  
  parameter region of the phase diagram where spinodal dewetting occurs. For small times the ﬁlm 
  
  becomes unstable showing a typical spinodal labyrinthine pattern with a typical wavelength. The 
  
  nanoparticles concentrate where the remaining liquid is situated. However, they are ‘slow’ in their 
  
  reaction: when ρl already takes values in the range 0.08 – 0.83, the nanoparticle concentration 
  
  has only deviated by about 25% from its initial value. The ﬁlm thins strongly forming many 