AlexDavis43
Member
Spot on with this post, but some caveats:
1. When you measure your filler weight, do it with like 10 or more capsules on the machine, and spread them out on the machine so you can kind of put the same pressure you would normally use in production. Then divide by the number of capsules. This will get a good average. Sometimes, filling only one capsule, you pack it tighter than you normally would.
2. Everytime you buy new powder, repeat this calibration step, even if it's the same brand.
3. Similarly, if you've been hanging onto the same bag of filler for a few months, even if you're storing it with desiccants (I assume everyone has desiccants for storing stuff anyway, right?), you'll need to recalibrate because the powders can pull an amount of moisture from the air and change weight per volume.
This is all assuming you have a cap filling machine where you load like 50-100 caps at a time, dump in the powder, spread it, and pack it. Other filling machines are probably similar, but I feel like the $10 machine I just described is most popular.
Tl;dr: recalibrate frequently. It's not a one-and-done. Those are some good tips.
Google geometric dilution
*and geometric dilution