Abstract: Spiked plate (100) having an operating surface provided with a plurality of conical spikes (200), configured to penetrate into an inner side of a full grain natural leather having a thickness t and make blind holes in said inner side of the full grain natural leather, wherein:—a base diameter d of the conical spikes (200) ranges from 33% to 100% of the thickness t, whereby 0.33?t?d?t,—a height h of the conical spikes (200) ranges from 70% to 110% of the thickness t, whereby 0.7?t?h?t, and—a minimum distance D between the conical spikes (200) on the operating surface of the spiked plate (100) ranges from 200% to 430% of the thickness t, whereby 2?t?D?4.3·t.