sentences:  Similarly, he claimed that the anatase in the ink could have come from sand used to dry it (the hypothetical source of the sand being gneiss from the Binnenthal area of Switzerland) but his team had not examined the crystals microscopically, and Kenneth Towe responded that this was an essential test, given that crystal size and shape should clearly distinguish commercial anatase from anatase found in sand.Members of the Danish team later joined with others to perform microanalyses of the remaining piece from the 1995 carbon dating sample.They found a significant quantity of monostearin (Glycerol monostearate) which is commonly used in the food and pharmaceutical industries, with additional aromatic compounds; if it is not purely localised contamination from handling by somebody using something like hand lotion, this is likely to be the mystery post-1950 chemical soaked into the parchment.