Italic mu in squared Latin abbreviations?

[Doug Ewell via Unicode]

Ivan Panchenko wrote:

> Is there a reason why the mu does not appear upright

It was probably italicized in the glyphs printed in the relevant
Japanese standard, back in the 1990s.

The glyphs in the Unicode charts are not normative, except for a very
small handful of encoded characters like Dingbats where they are "kind
of normative."

Because of this, it's not necessary to worry about whether the µ in the
CJK squared Latin abbreviations is italic or roman in any given font.
Fonts will be fonts. Glyph variation happens.

Rendering ㎖ with a capital M does seem to be a violation of character
identity, but Arial Unicode MS has not been updated since 2000 and this
problem is likely to remain unsolved. 
 
--
Doug Ewell | Thornton, CO, US | ewellic.org