I just started my first year of university and because I'm visually impared I have trouble seeing what's written on the chalkboard.
I've partially solved this problem by purchasing chalk from hagoromo and asking my professors to use it. (Leaves a wider and nicer line and erases more cleanly).


But the chalkboard still gets dirty from chalk which reduces the contrast between the board and the chalk, which in turn makes it harder for me to see.


My university supplies what look to be whiteboard erasers for the blackboard which I suspect isn't a good idea.


I'm looking for suggestions for premium chalkboard eraser brands or DIY options.


Thanks


EDIT: My university washes all the boards regardless of department every day at the end of the day.
(At least in my campus).



Chalkboard eraser
The Hagoromo chalk, now produced in South Korea, is well accompanied by a professional Korean microfibre eraser (600,000 fibers per square inch), as explained by professor Bayer on his [Chalk page.](https://www.math.columbia.edu/~bayer/LinearAlgebra/Video/Chalk.php)


![](https://www.math.columbia.edu/~bayer/LinearAlgebra/Video/images/chalk.jpg)
![](https://i.stack.imgur.com/IgrZZ.jpg)
For more on chalk, there is this older [MO post.](https://mathoverflow.net/q/26267/11260)


