The package below has been updated on tug.ctan.org and the changes should be at your favorite mirror any time now.
Thank you, Jim Hefferon Saint Michael's College
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The following information was provided by our fellow contributor:
Name of contribution: fontch Author's name: Rodrigo Medina Location on CTAN: /macros/plain/contrib/fontch/ Summary description: Changing fonts, sizes and encodings in Plain TeX License type: lppl
Announcement text: ---------------------------------------------------------------------- The fontch macros allow the user to change font size and family in any place of a plain TeX document. Sizes of 8, 10, 12, 14, 20 and 24 points are available. A sans serif family (sf) is defined. A command for producing doubled-spaced documents is also provided. There is support for math-bold, including a new family (mb) for bold math-italic and macros for bold math-symbols. Optional support for Latin Modern T1 and TS1 fonts, AMS fonts, and Double Stroke fonts (for blackboard bold). There are macros for non-latin1 letters and for most TS1 symbols. ----------------------------------------------------------------------
This package is located at http://tug.ctan.org/tex-archive/macros/plain/contrib/fontch/ . More information is at http://tug.ctan.org/cgi-bin/ctanPackageInformation.py?id=fontch (if the package is new it may take a day for that information to appear). We are supported by the TeX Users Group http://www.tug.org . Please join a users group; see http://www.tug.org/usergroups.html .