White House paper是一种什么样的纸?

题目

White House paper是一种什么样的纸?
White House paper在短文中说是一种写信的纸?附上短文如下---
Do you want to say what you think in a letter to Jimmy Carter,President( 总统) of the United States?You’ll get an answer from him--- written in ink,not typed—after only a few days.
Jimmy Carter gets about 4,000 letters week.He answers every letter on special( 特别的) White House paper.But he doesn’t need a lot of time for it.In fact,he only gives 20 minutes a week to look at his private letters.He has the most modern computer in the world to help him.It costs $ 1,200,000.
This computer has its own room on the first floor of the White House.It has a bank of electronic pens and they write like the president writes,in his favourite light blue ink.Each letter to the President gets a number according to the type of answer it needs.The pens then write the correct answer for it according to the number .Each letter takes less than a second to write.A White House official said “It’s not important that the letters come

答案

白宫纸,估计是一种高级用纸