We have been talking about typefaces for eInk, how they are optimized, whether or not they need hinting, Google's and Amazon's efforts... So, I have decided to optimize and share a typeface with you.
This is a modification of Matthew Carter's Bitstream Charter. Charter was originally designed for early laser printers in 1987. Office printers back then usually had 300 dpi, so Charter has, according to the Carter, "a very simplified structure and a minimum number of curves, more straight-line segments [...]."
This features also make it very suitable for eInk screens.
In 1992, Bitstream donated the typeface to the X Consortium, allowing it to be modified and redistributed. Today, Charter has two main distributions,
xcharter and
Charis SIL. While xcharter only adds missing features like kerning, small caps and ligatures, Charis SIL is almost a redesign. Core of the font is still the same with Charter, but some glyphs are modified and many are added.
I, being a fan of Matthew Carter, decided to base this modification on xcharter, I believe it is more faithful to the source. You might also know Carter by some of his other typefaces: Miller, Tahoma, Verdana, Georgia, Big Caslon and Galliard.
There is also another optimization of Charter done by MobileRead member JSWolf, it is based on Charis SIL. You can find it here:
https://www.mobileread.com/forums/sho...d.php?t=184056
I kept my modifications very simple. I added some weight, roughened some very fine details (eInk still has problems with very fine details, I believe we are better like this), optimized the font files and fixed kernings for Kobo ePubs. Final product also doesn't have hints, but you can add them with ttfautohint. There is a discussion here whether or not you should:
https://www.mobileread.com/forums/sho...d.php?t=259705
Type also has lower base size and line spacing values than what we normally see, I believe this would help with devices like Kobo ereaders which has high values at their lowest settings.
Here is the file:
http://drop.muratcansimsek.com/Charter%20eInk.zip (222 kb)
And here is a photo from Kobo Glo:
Enjoy!