Pipettes and syringes for measuring drop sizes

Is your drop the same size as mine?

Have you ever wondered if the size of a drop is always the same? The short answer to the question of the size of a drop is that the volume of a drop usually does vary, in fact depending on 10 different factors. This is of course relevant to alt. proc. because recipes often specify “20 drops”, “20 gtt” or … Read more

Argyrotype print inspection

Argyrotype process

Argyrotype is a user-friendly iron-based silver printing process that produces brown images on plain paper. It is derived from the Argentotype, Kallitype, and Vandyke processes of the 19th Century, but has greater simplicity, improved image stability, and longer sensitizer shelf-life.