The HTML in your template, all its doing is setting the font to BOLD, centering it and setting size.
All 3 of these can simply be done with printer template formatting;
In summary relavent to the formatting your HTML is doing;
<Lxx> - Left
<Cxx> - Center
<Jxx> - Justified
All of these xx is the size in the formatting of width/height multiplier, 01 makes wider, 10 makes taller, 11 makes wider and taller…
<EB>- Enable bold
<DB> - Disable bold
So my question was is why are you really using HTML? Usually people do it to change the font but you haven’t specified a font (although believe HTML defaults to something other than the normal printer font.)