Hi Larry Thank you for the website. It was very interesting. I have a portrait of my great grandmother taken in Montreal, Que. @ 1875. The portrait is huge, about 28 x 36. It looks like it is on cloth and some kind of shellac is on it. It is still in great shape. I read over the info but can't figure out what process was used. Also at the same time I have tin types from Ohio 1860s that are in great shape. My question is does anyone have any idea what process was used? I find it interesting that in Canada they had what I feel was a better process of photography than they did here in the states for that time period. Thanks Jan Gouin Hi All I was looking for photo colorization software and found a place that does restoration, colorization, etc. Anyway they had a nice piece on the history of the different photo processes that would be of interest. It is not too elaborate and was about as much as this photo dummy needed to know. Try: Guide to Identifying your Family Photos http://www.light-magic.com/identify.html Larry Friend (Black Buffalo) niidji@mchsi.com