6:08 AM
@Cerberus relatively. £14 a cartridge individually. If you buy a whole set at once, £100. Naturally I plan on making other people pay for it via print sales :)
It is high quality archival ink, rated for 75 years of uv exposure.
You can also buy kits to refill them which are about 1/3 of the price, but I'm always dubious about those