Talk:Scratch hardness

Illegitimi non carborundum

 * See also: "Мартышка и очки" : (Scratch hardness is a particular consideration in optics.)

 "The first fact which is apparent from the data obtained from our testing is that hardness is distinctly a characteristic of the test used to determine it." — Ridgway, et al, The Carborundum Company

The page could maybe use improved definitions of scratch hardness and scratch test.

Sources for improvement of the page:
 * Primaries for Ridgway and Wooddell: (Ridgway and Wooddell are two important historical attempts to expand mineralogist's Mohs hardness into a practical scale for ceramics manufacture, but there are other methods.)

Searching on these titles finds some secondaries. Examples:
 * (ironically published the same year as the WP page)






 * Several current ceramic coating manufacturers name "Mohs, Ridgway, and Wooddell" as a triad, but I will not try to see whether they were influenced by WP.





Maybe another way to may go at it:
 * Science.gov search scratch+test+analysis

IveGoneAway (talk)

For convenience, I copied the the remainder of the samples of abundant sources dome the delete discussion:


 * "a professor of mechanical engineering devotes the whole of &sect;6.6 to scratch hardness."
 * "a professor of mechanical engineering devotes the whole of &sect;6.6 to scratch hardness."


 * "... has good introductory level material on scratch hardness in, unsurprisingly, its introduction on pages 1 to 3."
 * "... has good introductory level material on scratch hardness in, unsurprisingly, its introduction on pages 1 to 3."


 * "Atkins tells us that there's a whole distinct second measurement of scratch hardness that isn't Mohs's. It's Thomas Turner's sclerometer.  Add in that name and '"Hardness of Metals", Trans. Birm. Phil. Soc. 1886' and entire bibliographies on scratch hardness start turning up, and then a 1934 book by Hugh O'Neill on The Hardness of Metals and its Measurement that brings in Adolf Martens's quantification of Turner, as mentioned, and indeed as cited by, Atkins. "
 * The above quotations are from User:Uncle G.













IveGoneAway (talk) 03:05, 4 May 2022 (UTC)