These are Short International Standard Cartridges that fit both the Pocket 6 Fountain Pen and the Rollerball Pens.  

I decided to start stocking some fun colors to help you be prepared for that invitation calligraphy project, doodles or notes to your friends with fun colors! Fun! We love that! There is a LOT of amazing ink out there, but these will get you started. 

Keep in mind these colorful inks are water soluble,  and will "wash out" a bit if you spill water or coffee on your notes, letters, etc. So! If you need indelible ink for an address or important document, please pick "document ink" in black or blue since those are more water resistant. Thank you! 

These inks are made by Monteverde and I find they dry out a little slower than the Diamine inks I was using prior. This means your pen can stay uncapped for a little longer than before, but keep in mind, best to cap your pen when not using it to avoid a dried up nib! 

The color swatches are on computer paper and Tomoe River paper to show how much the color changes based on the type of paper you use. Funny, I actually like these colors way better on the computer paper than the Tomoe River paper! For those that don't use fountain pens often or are just getting started, the Tomoe River paper is a very thin, smooth writing paper with a cult following, but! It dries slower due to its coated nature. There is a whole world out there of inks and papers... I am just beginning to understand it myself! (Ian)