"7532雪印青餅雪印原是台灣茶人取名 ~ 而原茶品大票麥頭為7532,因餅面細芽多且當時毫芽白如冬雪,故市場上稱之為雪印,此茶特色為配菁細,芽頭多,故香氣口感幽雅表現較細膩留韵持久,甜香滋味滋味甘滑醇厚，入口即滑入丹田"
From http://tw.myblog.yahoo.com/a586203/arti ... 9&next=457
It's because it got a lot of small buds, and the surface of the cake look like snow.
I need more time after work to translate this properly.