2-ply (two-layer) Non-Carbon Required (NCR) paper roll, commonly used in dot matrix impact printers, cash registers, kitchen printers, and point-of-sale (POS) systems. The two plies typically consist of a white top sheet (original copy) and a yellow bottom sheet (duplicate copy). The "blue image" refers to the color of the text or impression that appears on the second (yellow) ply when pressure is applied to the top (white) ply by the printer's ribbon or writing instrument. This is achieved through a chemical reaction between coatings on the paper layers, eliminating the need for traditional carbon paper.

The rolls are designed to provide clear, legible, and durable copies for various business transactions and record-keeping. They are often individually shrink-wrapped to protect them from moisture, water, and dust.

2-Ply Carbonless: Creates an instant duplicate copy without carbon paper.

White/Yellow (W/Y) Color Combination: The top sheet is white, and the bottom copy is yellow, making it easy to distinguish between the original and the duplicate.

Blue Image: The printed text or impression on the yellow copy appears in blue. (Note: The print color is determined by the printer's ribbon, not the paper itself, but for "blue image" rolls, the expectation is a blue transfer).

Clear and Sharp Printouts: Engineered for good image contrast and readability.

Durable: Made to withstand daily use in high-volume environments.

Moisture and Fade Resistant: Often treated to ensure longevity of the printed information.