ocr: Hacking Stamps Update By Aristolle with talk of another postage increase circulating, we have had many a reader ask us about free postage. Although we still published get an requests article for on free issue 94. postage In not 94, too I wrote long about ago, the we nethods of using Isopropyl Alcohol to remove cancellation marks. Well, the alcohol still works on most stamps with a few that are acceptions. on the The larger alcohol packages. method For will some not work reason, on the stamps Post Office uses non-alcohol based ink on large packages. Below is the type of cancellation mark that w ...