Earlier this week I came across an article from the British Library discussing their policy on using gloves to handle their more precious items. It provided the following which may be of interest:
“A widely referenced paper, in the conservation field, and several forensic references, refer to fingerprint deposits consisting of 'over 98% water'. Recent analytical and theoretical studies of latent fingerprints, demonstrate that this figure is substantially in error. The deposit from a single human finger touch, whilst varying widely between individuals, is likely to contain less than 20% water and on average be about four micrograms of a mixture of amino acids, salts, primarily sodium and potassium chloride, fatty acids, squalene and many other trace compounds.”