I tried the artists acrylic "naphthol red" by winsor & newton. It's a semi translucent medium. So I added some water to it and went to town. Pics below.
IMO it painted alright. I'm not gonna run out and buy the whole line... but next time i buy colours, I'll probably pick up some of these. they cap nicely and it's easy to take what you need and leave the rest. I like em. cost wise i haven't checked but, as i said, they were giving these away so it can't be that expensive, and they come in larger tubes, so take that as you will.
linky
https://store.opusframing.com/sagro/storefront/store.php?mode=browsecategory&category=3359 prices are in canadian and format is larger size so it's maybe comparable.
I hope this helps.