Albumen prints and egg whites…all the rage back in the day…and a few other things
The albumen print, also called albumen silver print, was published in January 1847 by Louis Désiré Blanquart-Evrard, and was the first commercially exploitable method of producing a photographic print on a paper base from a negative. It used the albumen foun
p-Phenylenediamine (PPD) is a derivative of aniline used in kevlar, hair dye and henna substitutions among other things, the derivatives of which are used in antiozonants among other horrors
p-Phenylenediamine (PPD) is an organic compound with the formula C6H4(NH2)2. This derivative of aniline is a white solid, but samples can darken due to air oxidation.It is mainly used as a component of engineering polymers and composites like kevlar. It is also an ingredient in hair dyes a
Lumiflavin and Lumichrome notes (and something called Autochrome)
Lumiflavin is a toxic product of photolysis of vitamin B2. Lumiflavin is a compound showing yellow-green fluorescence, formed by a photolysis of riboflavin in alkaline solution. Lumiflavin 1948-Present Lumichrome 1944-Present The Autochrome LumiĂšre
4-Aminophenol – what a molecule!
This is a humble organic compound with the formula H2NC6H4OH, but donât let its unassuming structure fool you. This is not just any crystalline powder; this is a chemical that moonlights as a pharmaceutical ingredient, a hair dye precursor, andâwait for itâa black-and-white film developer. If