Click in to his site to see First test of the quicklime hypothesis (Turin Shroud image) – in pictures. Don’t knock him for having produced only scorch marks and not an image yet. Who really has, so far? Nicholas Allen, Joe Nickell, Craig-Bresee, Luigi Garlaschelli? Actually, Colin has with hot metal. Let’s see where he goes with this.
Experimentation is always a step forward no matter the results.
In this case only a qualified chemist who knows what he is doing should be experimenting this way.