labnight

Notepad time. Reminder: these are reminders of other posts, other conversations. Gain what you may from them, much as you would if you overheard a conversation in a gallery or bookshop.

Scattered: Tell your own story, not other’s. A summary, wiggle lines, not a story, not a picture. The generic cut-n-pasted “about.” Note:chord:score. Simplified to the point of childish; not childlike.

The rise of the enthusiasts cursing the young. A half-open door between a dreaded future and a dead end past. The light at both ends of the tunnel.

Brovira Hard: Rhodium Chloride.

Split Grade Printing

split grade calculation
from patent

multiple filter, multicontrast printing.

Split Grade was the first way the variable contrast was printed. Commercial printing made use of special two filter timers. Both filters were used sequentially. In the beginning, filters were made by the lab. DuPont published the how to: which dyes to use. After several years on the market, filter sets were made. These were considered expensive so the use of 2 filters continued in many labs.

The filter cradle isn’t shown in the video.