Printed self-carbon books, also known as carbonless books or NCR books, are a type of document that allows users to create multiple copies of a document without the need for carbon paper. They are commonly used for invoices, order forms, and receipts, and have several advantages over traditional carbon paper methods.

1. Efficiency: Self-carbon books are more efficient than traditional carbon paper methods because they eliminate the need to insert carbon paper between each sheet. This saves time and reduces the risk of errors or misalignments.
2. Cost-effective: Self-carbon books are more cost-effective than traditional carbon paper methods because they do not require the purchase of additional supplies such as carbon paper. They also reduce the risk of errors, which can save time and money on reprinting and corrections.
3. Professional appearance: Self-carbon books have a professional appearance and can be customized with a company’s branding and contact information.
4. Durability: Self-carbon books are more durable than traditional carbon paper methods because they do not require the use of carbon paper, which can easily become smudged or torn.
5. Environmentally friendly: Self-carbon books are more environmentally friendly than traditional carbon paper methods because they do not generate waste in the form of used carbon paper.

In conclusion, self-carbon books are a cost-effective and efficient way to create multiple copies of a document without the need for carbon paper. They have a professional appearance, are durable, and are more environmentally friendly than traditional carbon paper methods.