Hello there. Please give me pardon if I seem ignorant by posting thia, but I am currently at a bit of a loss and thought I might inquire upon some of the sharp minds in the APUG forums So, I have been doing some research into various alternative processes During the last half year - being first enamoured by the Niépceotype process developed in the 1800's by Claude Félix Abel Niépce de Saint-Victor. However, it is a very labourious process which required equipment that I currently do not have at hand - which means that I have shelved it for the time being. However, another very interesting process that i have been researching is the Catalisotype - a process developed by one Dr. Thomas Woods in the mid 1800's, where a sheet of paper is coated with a syrup of iron iodide mixed with a solution of silver nitrate. After being exposed in the camera the image develops spontaneously when left in the dark and then later only needs to be fixed, either with potassium bromide or potassium iodide. Now, most of these chemicals I can manage to fetch from various sources (Photographer's Formulary, Artcraft Chemicals and so on), but the syrup of iron iodide I most likely have to make myself. The recipe for this solution is fairly simple: · Iron filings=19g · Iodine=58g · Hypophosphoric acid=10ml · Purified water=125ml · Syrup simplex q.s to make 1000ml Syrup simplex is simply sugared water, two and a half pounds of sugar to a pint of water. I am not completely sure whether or not it is necessary for the process, but I will include it just to be safe (I think it is mainly acts as a sweetener for those who are to ingest the Iron iodide syrup as it apparently also has applications as a hematonic and antiseptic from what I have read). However, I have no idea where I can get Hypophosphoric acid. There seems to be very little on the web that might seem to point me in the right direction.. I merely lack a source for this one chemical to finish my necessary kit for starting to make catalisotypes, and as I would very much like to try out this process it is somewhat frustrating to be stuck so close to my goal after so much intensive research. Does anyone know where I might be able to find this acid? I would be tremedously grateful for any help PS: There is also one part of the main catalisotype recipe text that confuses me slightly. It adresses the kind of paper used for the process: "Let well-glazed paper (I prefer that called wove post) be steeped in water to which hydrochloric acid has been added in the proportion of two drops to three ounces. When well wet, let it be washed over with a mixture of syrup of iodide of iron half a drachm, water two drachms and a half, tincture of iodine one drop" What does the good doctor mean by "well-glazed paper" and "wove post"? Pardon if I seem ignorant in my inquiry, but i decided to ask in order to try and clear up some confusion. AI would be very grateful for any possible assistance in this endeavour..