A thicker skin will control overtones (ring) produced by any drum. The thicker the skin, the dryer and more woody the sound becomes. Skin thickness is recommended relative to the shell size- the larger the shell, the thicker the skin. This produces a balanced sound across the entire set of drums. Fiberglass shells require even thicker (+ .2mm) skins than the recommended thickness for wooden drums below.
The skin thicknesses below will produce a warm and classic sound with crisp slaps, round open tones, rich bass and controlled overtones:
Bongo Macho: 1mm
Bongo Hembra: 1.4mm
Requinto: 1.8mm
Quinto: 1.8mm
Conga: 2mm
Tumba: 2.2mm
Super Tumba: 2.4mm
Djembe: 1mm