How Do I Know if my Pad Printing Ink is Mixed to the Right Viscosity?

Do a simple check by eye. Put a stir stick into the ink, mix it around and lift the stick out of the ink mixture.  Watch the ink from the stick flow back into ink mixture. 

The ink is at the right viscosity if it stands apart “piles up” on the top of the ink surface before quickly disappearing back into the ink mixture.

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