It sounds like you are referring to a case of duplicate books that use carbon sheets to create copies of written documents. These are often used for creating duplicate records…

How to Use the Duplicate Book with Carbon Sheets

Step 1: Unpack the Case

• Carefully open the packaging of the case to reveal 12 duplicate books.
• Remove one duplicate book from the case to begin using it.

Step 2: Prepare the Duplicate Book

• Open the duplicate book to the first page.
• Ensure that the carbon sheet is placed between the original page and the duplicate page.

Step 3: Write on the Original Page

• Use a ballpoint pen or pencil to write your information on the original page.
• Apply firm pressure to ensure the carbon sheet transfers the writing to the duplicate page.

Step 4: Remove the Carbon Sheet

• Once you have finished writing, carefully lift the carbon sheet off the pages.
• Store the carbon sheet in the pocket at the back of the book for future use.

Step 5: Detach the Duplicate

• Gently tear along the perforated edge to remove the original page if needed.
• Keep the duplicate page in the book as a permanent record.

Step 6: Store the Book Safely

• Once finished, close the book and store it in a safe place.
• Keep the book dry and away from direct sunlight to preserve the pages and carbon sheets.