I take it the sediment of the suspension woyld plug the needle?
I had a horrible time with some water based test suspension. I could not get it through anything without loading a pocket of air with it, keeping it shook up after insertion, and then shoving the plunger hard and fast, without pause.
Most of it went in my pecks just so I could lean forward and backward to keep it shook up after insertion.
I am sure it looked as stupid as it was.





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