Use only heavy black ink intended for fingerprinting.
Other types of ink smear or do not provide adequate coverage. "Inkless" fingerprint pads do not provide acceptable prints.
Can I use pen ink for fingerprints?
Take a ball pen refill, pull out its nib. Blow it from the back so that a drop of ink falls on a sheet of paper. Spread it thoroughly and place thumb on a sheet and you are ready to imprint your thumb impression.
How do you make homemade fingerprint ink?
- Mix equal portions of water and liquid tempera craft paint. ...
- Place a dry sponge into the mixture to soak up the colored water, then squeeze it to drain excess. ...
- Press your finger onto the sponge to get the color on your finger, then press your finger onto a piece of paper to make a print.
