Examination of the cross-sections has shown that in the earlier phase he used exclusively cobalt blue, available from 1802, his habitual choice during the 1870's and early 1880's, but in finishing and revising the composition he used only artificial ultramarine which came in use in the 1870s.
A common misconception with this is that nits and lice are the same thing. In fact this is not the case, the truth is: Lice are the tiny grey or brown insects that are found in the hair. The lice are about the size of a small seed (i.e. Sesame seed) and cling to the hair staying close to the scalp which they live off.
Lice survival guide for parents. Baby lice, known as nymphs, are not much bigger than the nits and tend to be light in color. Nine to 12 days later, they become adults and mate, the females lay their eggs, and the cycle continues. An adult louse can live up to 30 days on the human head.emale lice lay up to ten minuscule eggs a day. Lice eggs (called nits) are oval in shape. They may appear to be the color of their host's hair, ranging from white to yellow to brown.