I just read an interesting thread over at the CGC forums. Someone did an experiment on standard backing boards to determine which side you should place your comic book against.
First, the tester conducted his pH test on standard comic book boards that you find in most comic book shops. These are the boards that are coated and shiny on one side. What he determined in the test is that you should place your comics on the side of the board that is shiny.
Finally, remember the test was not with a true archival backing board. For all your valuable comics, I recommend that you do not use the backing boards with the coated surface. You should use backing boards that are 100% archival on both sides.
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