Robert, very interesting, thank you. Though I use facial tissue first to remove oil and then microfibre to remove any remaining fine film of oil, I've often nonetheless wondered about the tissues. I do gently 'roughen' the tissue and vigorously shake it before applying it to a blade to minimise any chance of scratching. So I searched kimwipes and found this phrase from one of the suppliers:
KimWipes are a type of cleaning tissue commonly used in laboratories.
KimWipes are composed of paper, silicon, and other substances.
As a result of the silicon, the paper is somewhat rough feeling.
KimWipes are used to wipe a variety of items, including slides and pipettes.
They are sometimes used to clean lenses as well, but using lens tissue
instead is often recommended, as KimWipes can scratch optical surfaces.
And perhaps 'optically perfect' Ninontou??? Many years ago (decades?) someone in England (in The Token Society of Great Britain's "Programme") did a comprehensive analysis of various types of tissue, facial, top-end toilet paper etc etc, with various tests including burning/calcining to measure ash content as an indicator of abrasiveness. As I remember, better quality facial tissues were found to be adequate for our purposes.
BaZZa.