“…Lange) Imbach all over the world. For example, we can find references to its use in Germany (Lemke, 1963;Lelley, 1984), UK (Randle et al, 1983;Randle, 1985;Randle and Smith, 1986), Canada , the Netherlands (Gerrits, 1983(Gerrits, , 1985(Gerrits, , 1986(Gerrits, , 1989Gerrits and Amsing, 1996;Resink and de Leeuw, 1993;Peeters, 2008), USA Sinden and Schisler, 1962;Schisler, 1970Schisler, , 1971Schisler, , 1979Schroeder and Schisler, 1981;Abell, 1988;Dahlberg, 1990Dahlberg, , 1993Wach and Wheeler, 1998), Ukraine (Petrenko and Bisko, 2004), India (Garcha et al, 1987;Gupta y Vijay, 1992), Italy (Lanzi, 1985), Belgium (Pitblado, 1993) and France (Vedie, 1990;Vedie and Retailleau, 1992;Desrumaux et al, 1999). However,due to the toxicity of formaldehyde other kinds of treatments resulting in protein tanning have to be investigated, specifically for organic production of mushrooms.…”