Dear experts,
I greatly value your knowledge and experience, and so I turn to you for advice. A bit of background. I'm a total novice, and I'm looking to
very slightly change a font for my own,
purely personal use in private. As I age, I've come to think I need to use fonts that are darker, and sharper against the white paper.
I have a question about MT Fournier. I like it, but would like to give it a bit more heft. To help explain what I mean, think of a text face that comes in 'grades' (e.g., Aria Text or Mercury Text). Let's say MT Fournier is Grade 1. I'd like to beef it up to a Grade 2 or 3.
I must rely on crude, rustic methods. Like, using the Effects action in Fontlab 5. Thicken the strokes by a few points, and that's it. (Go ahead, laugh. It's ridiculous, I get it, but I'm not looking to do art here. I'm just trying to change a leaking faucet in my kitchen, as it were. So, laugh away.)
Now for my question. Suppose I use the Effects/Bold action above. Should the number of points for the Vertical scale be the same as for the Horizontal scale? I mean, if I wish to thicken the stroke by 2 extra points on the horizontal, should I thicken it by 2 points vertically as well? Or is there some secret formula -- for ratios between H and V scales -- that I should learn?
Again, my aim is to get something with the same average contrast as MT Fournier, just a bit darker. For edification, here's what the numbers look like, in the version you buy from MyFo. (BTW, the irregularity in the glyph position is theirs, not mine.)


Thank you kindly for any advice you may have for me!
Comments
So if you're really thinking about a change in grades, a mechanical effect that doesn't distinguish between horizontal and vertical should get you most of the way there.
I don't know, though: whether subtle parts of the design might get mangled in the process; whether vertical metrics would need to be reset; whether hinting would get thrown off; and whether such editing violates your EULA.
https://www.boldmonday.com/typeface/quinn/
https://typofonderie.com/fonts/ps-fournier-family/#details
https://www.dardenstudio.com/typefaces/corundum_text
https://fonts.adobe.com/fonts/source-serif#fonts-section
For the fellow enthusiast: SwissTypefaces used to sell their own revival, New Fournier, no longer available. I expect they'll bring it back one day, in an upgraded form. A sample, below.
I also relied on FontLab's in-built effects (now in version 7) for changing weight. I find them to do a pretty good job and to be able to get one pretty far, of course later I have to manually clean and fine-tune the result.
I use the offset function, besides for Bezier sculpting in the everyday process of work, only in special cases like monoline fonts or more detailed characters like the @ symbol. In FL7, under the Tools/Actions menu path, there is an advanced type of bolding developed by the FL team, and a simple one used by other font editors, as displayed on the below screencap:
I think the two options with the offset and other ones could be quite enough to perfect your work. In all cases, the eyegauge is the best and most indespensible tool, and if this get's changed by age, then you're in the same class as some of the greatest typographers of all time. If memory serves, Bodoni was "accused" of using extremely white paper, to which he replied that, in this way, his printmaking will age better with all the centuries it has ahead of itself (smile)
You could find somebody younger to check the specimens but I see no mistakes thus far from what you've shown
And, yes, the eye must be the ultimate judge. Was it G.G. Lange who said, the real test for a new font is whether it looks right at 8 pts.
I think Cortat said he based it on an edition of Helvetius' De l'esprit. Must have been quite rare, I haven't been able to find it. OTOH, Helvetius made such a splash with that book, that it went through many editions and translations, so...