There are varies of industrial filter papers in the marketing. Then facing
the kinds of filter papers, how can we identify them? Many methods flow online.
Here, I will provides a simple way that we can distinguish themselves by
ourselves, which only need Household iodine.
You dot a little iodine on the paper, if the paper come to black, the filter paper is not so good. This means there are too much fossil powder in the paper’s inside, which can not effectively filter. Conversely, the paper is good.