The term "carbon duplicate" suggests that the notebook is designed in a way that whatever is written on the top sheet (the original) automatically creates a duplicate copy on the sheet beneath it, without the need for carbon paper. This type of notebook is commonly used for making multiple copies of handwritten or typed documents simultaneously. The compact size of the notebook (100 x 125mm) makes it portable and convenient for various notetaking and record-keeping purposes. 100 x 125mm indicates the size of each page in the notebook. Each page measures 100 millimeters (mm) in width and 125 mm in height. Each notebook contains 200 pages, providing ample space for writing. A leaf refers to a single sheet of paper, so in this case, there are 100 leaves in the notebook. Since it is a carbon duplicate notebook, each leaf likely has a duplicate copy underneath it, allowing for the creation of duplicate copies of whatever is written.
 
SPECIFICATIONS
 
Dimension: 100 x 125mm
Page: 200
Leaf: 100