I just opened a new 100 sheet box of Ilford MGIV and noticed that it floated when put into the vertical archival washer. Strange because the year old package I just finished did not float. I also saw that both new Oriental VCII and Bergger VC NB did float. My Ilford MGWT did not float. Just wondering if there has been a recent change to the MGIV paper base? It does seem thick and stiff compared to some older papers like Agfa MCC.