🙂 no tatoo ink does not contain graphite 🙂 but might contain carbon black. the ones with the name CARBON BLACK TATOO INK has carbon black in it 🙂 if you use the filler tatoo ink, it has the highest loading of carbon black versus the rest of fillers (water?)
https://www.killerinktattoo.nl/carbon-black-tattoo-ink-filler-12
filled with carbon and will last you a few years 🙂 ince you still have to dilute it allot. all depending on the resistance you want to achieve ofcourse 🙂
If I connect test signal through 12v transformer to TSB-2555B capsule directly then I should here a tiny sound?
Yes, you will here tiny, VERY tiny sound and mainly at frequencies > 5kHz.
Remember, besides having very small area, mic capsules have their diaphragm resonance up around 10kHz. So, the response rolls off -12dB/oct below 10Khz when used as a speaker.
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