I’ve always loved the idea of monoprinting. I have done lino printing and carved the blocks and once you have carved the block you can print with it time and time again.
I like monoprinting because you only get one print (and maybe a ghost print with the remainder of the paint or ink on the gel plate. I also like the unpredictability of what you will get when you print. You can pick up remnants of other paints and prints that might still be on the plate — and this gives the print an otherworldly look that is always surprising. Also, if you don’t like your first or second or even third layer of paint or ink you can change it and sometimes the 4th or 5th layer will be your favourite.
Today it is bucketing down rain and I cannot go out as I am recovering from a bad cold that I caught at a wargaming event. I decided to get out my 5 inch by 7 inch gel plate and do some printing. 
I’ve used acrylic paints (several different brands from cheap craft acrylics to more expensive heavy body acrylics), alcohol inks on a few of the backgrounds and a white gel pen and blue Sharpie to highlight certain areas. I also used metalic gold acrylic paint to highlight stripes, but sadly they don’t show up in all their beauty on the photographs. Plus, I am a terrible photographer. When I feel better I may try with my lightbox.
I enjoyed trying these techniques and I will be using them on cards, bookmarks, artist trading cards and in my art journal. As I make things with them I will post my creations here.
Even this ghost image is lovely. I was using some cool colours and autumnal colours because that’s the vibe I’m feeling right now. 
I love the last image in yellow and red. It’s a ghost image and is stunning. It looks like a faded medieval wall painting you might find in a church.
Doing the gel printing today was helpful as I didn’t feel well and needed to bring some colour in my life.
If you want more information on gel printing, here is a video with some of the basics, but there are a myriad of techniques. Teresa Morgan is a wonderful artist who makes and uses gel prints.
https://youtu.be/_sW5n9DD8Dc
Her website: The Fat Cactus
https://www.thefatcactus.co.uk/