For a little background to these overviews, see here . History: First introduced by Louis-Desiree Blanquart-Evrard in 1850, albumen printing was the dominant photographic process for most of the second half of the nineteenth century. Negatives: A density range of 2.0 to 2.5 is good. Preparing the albumen: 500ml of egg whites (no yolk or white stringy bits) + 1ml glacial acetic acid + 15gm ammonium chloride + 15ml distilled water. Stir briskly until it turns into a froth. Cover container and refrigerate for 24 hrs. Remove the froth on the top and filter the liquid through cheesecloth. Age in refrigerator for a week or more. Coating the paper: Coat by floating for 3 mins and hang to dry. To double coat, the albumen needs to be hardened. This can be done by steaming, heating to about 150F with a hot iron under a protective board, or dipping in a 500ml 70% isopropyl alcohol + 15gm ammonium chloride bath. Sensitizing the paper: Either float, brush or use glass rod to coat with 12% silve
Adventures in Silver and Silicon