Posts: 73
Threads: 5
Joined: Jan 1970
First take your HP-49G+ calculator and write a program to calculate the desired volume needed. Then go out to your local chemistry store and put together a recipe of fast drying pigmented ink. There are a number of patents and references you can find on putting together a formula. Build the processing equipment and make a lot to last a lifetime (don;t worry, shelf stability limit a lifetime to months - 1 year). Or, go buy a refill kit and follow directions there, poking a hole in the appropriate place, refilling with a syringe and praying for no leaks or mess to destroy your printer...
Or maybe a calculator forum isn't quite the right place to get answers along this line....