16 paper opening was originally used in documents of institutions. Later, due to the popularization and development of A4 paper, 16K paper gradually faded out of the market.

At present, the medical records used in hospitals are probably A4. However, when examining an organ, it is necessary to print an image for the doctor to examine and record in the medical record. If A4 inkjet printing paper is used, the printed image will not be stored in A4 medical records. So the examination images printed by the hospital are all opened with 16.

16K paper used in school personnel files is generally18.5× 26cm..

Introduction to standards:

The specification of paper refers to that after the paper is made, it is trimmed and cut into a certain size. In the past, the size of paper was expressed by the number of "open" (for example, 8 open or 16 open, etc. ). At present, our country adopts international standards, and it is stipulated that A0, A 1, A2, B 1, B2 and other marks should be used to indicate the size of paper. According to the standard, the proportional relationship between the width (represented by X) and the length (represented by Y) of paper is X: Y =1:N. ..

According to the basic area of paper format, the format specifications are divided into A series, B series and C series. The folio size of A0 is 841mm×1189mm, and the folio area is 1m2. B0 has a width of1000 mm×1414 mm, and its width area is1.4m2. C0 has a width of 9 17mm× 1297mm, and its width area is/kloc-. The format specification of copy paper only adopts A series and B series.

If A0 paper is split in half along the length direction, it becomes A 1 specification; If A 1 paper is split along the length direction, it becomes A2 specification, and so on, it becomes A8 specification; B0 paper is also divided into B8 standard according to this method. The format sizes of A0~A8 and B0~B8 are shown in the following table. Among them, A3, A4, A5, A6, B4, B5 and B6 are common specifications of copy paper.