Matrix print data storage and method for encoding the data

The invention relates to an item, particularly such as paper, with applied matrix printing, for the storage of encoded data with high data density, whereby the printed surface of the item is divided into matrix cells, comprising matrix points with a given form and at least two different forms R, I, are printed in each matrix cell. Each form R, I, is selected from pairs of non-overlapping forms (R0, R1) or (I0, I1), having the same area adjacent to at least one matrix point of another form in the same matrix cell and occupying various matrix points in the matrix cell.