Sarah Johnson. Hairdresser. Amsterdam. Sarah covers the full range of styling work, from precision cuts to color and perms, adapting each service to the client's hair type. Hairdresser. Amsterdam. Sarah covers the full range of styling work, from precision cuts to color and perms, adapting each service to the client's hair type. Hairdresser. Amsterdam. Sarah covers the full range of styling work, from precision cuts to color and perms, adapting each service to the client's hair type.