這張測試卡設計目的是檢測文件復制品的可讀性。
在數字為84圖案內的八邊形圖案的兩條的方向必須在沒有7選擇8符號的識別問題。
The chart is designed to check the readability of the reproductions of documents.
In pattern number 84 the direction of the two lines inside the octagon must be recognized without problems for 7 out of 8 symbols.