In my experience, there are benefits to working with both mediums.
Working on white paper with graphite is great for fine detail, line control, and pricepoint. The standard HB to 4b pencils hold a point extremely well and can be easily sharpened with a pencil sharpener. Using mechanical pencils adds an extra level of refinement to your ability to create pinpoint dots. Erasing is also generally much easier on white paper. All the materials are also a fair deal cheaper than most white on black options. (Although everything in sketching is a drop in the bucket compared to pretty much all other astro gear so....) On the negative, you do end up having to mentally flip the image's exposure in your mind. It's not as tricky as trying to read a star chart with a mirrored image in the eyepiece, but there is definitely a bit of a learning curve there.
Black on White is gives you the advantage of seeing exactly what you get while you are drawing it. I also really enjoy working on black paper as there is considerably less glare from the paper when sketch. White paper reflects a lot of light and can effect night vision more than black. Sharpening charcoal pencils generally requires a blade instead of a pencil sharpener to avoid broken tips. Overall, I find that I need to use a much larger range of tools to convey a similar image when using white on black. My current black paper setup includes white charcoal pencils, black charcoal pencils, white conte, brushes and conte powder, two different white pens, a smudge tool, and an eraser. For Black on white it's just a 2B pencil, smudge tool, and an eraser.
Personally, I enjoy going back and forth depending on what I'm drawing. Quick sketches are usually done on white paper. I use a black paper logbook so most my sketches are done in there. For moon drawings It's currently an even split between white and black paper. I rarely do any post-processing in the computer as I enjoy having a physical copy of the final image, and all the marks that made that image visible.
Edited by AstroBoyInTheCity, 20 May 2024 - 04:22 PM.