How to measure the foam volume?
Yeah.. This is about my research.. Actually, this thing makes me confuse these few days. Okay, I know that to measure the volume, we need a measuring cup. The problem is, how to take out all the foam from the brushing simulation device into the measuring cup.
Haha. It's quite weird to write this thing here. Never mind. I'll find the technique soon. And finish this thing.
Soon.
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