I have a bunch of nice reds – reddish purples and the sun and light made it tempting to compare them side by side in the sun. I’ve used a brush and a Lamy Safari EF on a Rhodia pad.
My current favourites are the Red-Black Black Swan (Noodler’s) that works well for letter writing and is beautiful in broad italics, the vibrant PR Plum, the likewise and special Yama Budo (Iroshizuku) and J Herbins intense and saturated 1670 (lovely in a wet, flexy nib) and the very winey Montegrappa Bordeaux. All of them are dark enough to use for journalling and letter writing.
Featured inks:
paper 1 – lighter reds top-down: Rohrer & Klingner Morinda, Iroshizuku Momiji, J Herbin Rouge Bourgogne, J Herbin Rouge Caroubier, J Herbin 1670 Hematite, Stipula Calamo Cherry Red
paper 2 – dark reds – reddish purples top-down: Diamine Monaco Red, Visconti Bordeaux, Montegrappa Bordeaux, Noodler’s Black Swan, Iroshizuku Yama Budo, Private Reserve Plum.
lady dandelion 
Just love that PR Plum!
These colors are so gorgeous–makes me wish I had more occasion/inclination to use red ink. I knew Noodler’s Black Swan in Australian Roses would make me covet it, but the Diamine Monaco Red is also lovely from here. Thank you for posting these in such cheerful lighting, too!