First of all, it's a design made using rotary printing on a dyed base with a matte overprint. A very qualitative, expensive and little-used technique nowadays but which has 4 advantages: solidity, perfect wash, intensity and uniformity of the background, which gives depth to the design even with a low contrast of colors, the matte printing on small details reinforces the trompe-l'oeil and the sensation of texture, finally, only the use of wicks of the smallest diameter allows these patterns of exceptional finesse comparable to goldsmith guilloché.