Much has changed since 1980s, some technologies evolved, others perished, new ones sprouted.
for a number of reasons, we retain the original process of black and white laser print - technology now well established, robust and relatively cheap - that means the whole process of production is completely sealed -- no subcontractors involved. despite of its simplicity a Deep Cheque Document (DCD) is impossible to exactly reproduce without the original digital file.

made with high quality printer (1200 dpi), A4 size archive quality paper, 160 gsm or heavier, each Document contains “deep” elements on the border of visibility - and possibly beyond - think about this...
MΔ§¢HIηξTRAИSLΔTE :-/  
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