A couple of years ago I read a tutorial on some site (regret not bookmarking it) that somehow created a pattern of cracks on the emulsion. It involved something like a thermal shock with frozen/boiled water and some chemical. I really liked the results but forgot about it since I didn't have access to a darkroom. Now, does anyone know what I'm talking about? I'd like to try and print such an effect in the darkroom. Also, if it's possible to create the effect with household chemicals, I'd appreciate it. I searched 'film craquelure' and variants on google to no effect [bad pan - i know ]. Thanks.