The thing is, you are wanting the computer to act as if it has a regular font and a bold font, yet the text to appear the same as for just the regular font.
If the glyphs in the bold font are the same as those in the regular font, then they should print the same as those in the regular font, so you should get the result that you want. I write should because that is the theory, I have not actually tried it. Until tried on the computer that you are using, there can be no absolute certainty in the matter.
However, if you do not supply a font that is named as a bold font, then the operating system on your computer may try to produce a “faux bold” dynamically, by simply copying the regular font and widening the lines of the copy.
So you need to supply a font that is labelled as a bold, even though the glyphs are exactly the same as for the regular font.
Producing that bold font is reasonably straightforward, though needs several steps.
If the regular font is named, say Anytown and is in a file named ANYTOWNR.TTF, then you would need to open ANYTOWNR.TTF and save it with another file name. The name ANYTOWNB.TTF seems useful, though that letter B is not essential: I just wanted another file name and that name gives a useful guide to a human reader of the name.
Yet ANYTOWNB,TTF would not yet contain a font that would be regarded by the computer as the Bold version of the Anytown font.
I am unclear as to what is the minimum required yet the following will work well.
Format Settings… General
Change Classification Weight to Bold
Format Settings… Metrics
Click a Bold checkbox. The other Bold checkbox should change automatically as a consequence of doing that.
Format Settings… Classification
Change the Weight to Bold
Tools AutoNaming…
The Bold part should now have been set automatically.
When using the fonts, you need to install both fonts.
I hope that this helps.
William Overington
16 February 2011