What is PDMark^®?

Paper Data Mark is a unique patented technology for storing digital data on paper. PDMark data is stored on paper in the form of tiny symbols, which form a fine gray background. Their structure is not visible with the naked eye at a common distance.

Functioning of PDMark technology is similar to working with a CD disk. In the same way as we are used to storing data on a CD, using PDMark we can store any data on paper. The only difference is that while a CD drive is used to write data to a CD disk, PDMark writes data on paper using a printer.

		Data is written to a CD disk with a CD drive. Binary data is stored on a CD in the form of tiny points and dashes.
		Writing arbitrary data in a digital form on paper using PDMark technology is carried out with a printer. Binary data is written on paper in the form of tiny dashes.
		The process of reading back the data is similar to reading data from a CD disk. Data previously written to a CD disk in the form of tiny symbols is decoded and turned back into the original digital form.
		Digital data stored on paper using PDMark can be read back into a computer with a regular scanner. Tiny printed symbols are decoded and turned back into the original digital form.

The unique feature of PDMark technology is the ability to dependably read back stored data even in case either text or graphical data has been printed over it. In other words, digital data can be overlaid with visible text or images. For example, PDMark can be used to store a digital text file on paper together with its visible printed form.