When dark particles in the SPR were used, the
best quality of developed latent print on the wet
surface was obtained from SPR II for every type of
soaking solution. SPR II contains molybdenum
disulfide, tergitol NP-7 and choline chloride, with a
proportion of particles and detergent at 13.1. The
fingerprint image was nearly complete (moderate),
and had a ridge count of 12.98 (Tables 1 and 2).