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Re:Using Altair for most of my visualization in Python by dragonshed on Monday May 06, 2019 @08:01PM (#19845166)
The underlying vega library supports overriding styles for color and line properties - it may not be as difficult as you imagine to generate B&W graph outputs for print.
Re:Using Altair for most of my visualization in Python by jacobolus on Monday May 06, 2019 @10:58PM (#19846047)
Once you have a web / javascript output, there are a bunch of possibilities:

https://observablehq.com/search?query=stippling

https://observablehq.com/search?query=dithering

https://observablehq.com/search?query=halftone

https://observablehq.com/search?query=crosshatch

(Or go out and look around github or the broader web to find many more options.)