You didn't post a link, but I think you are talking about this card:
https://www.ebay.com/itm/1953-Bowman...fnGP5&LH_BIN=1
I see what you mean. Some of my 53 Bowmans have a white card stock on the front. However, the backs still seem to have the tan-ish hue. This one not only looks really white but inconsistent like on this card.
I would pass and find a different example.
Jim