Notes from Midtone Lab on step wedge densitometry, digital negatives, and alternative process printing.https://midtonelab.com/notes/en-ushttps://midtonelab.com/notes/platinum-print-contrast-test/https://midtonelab.com/notes/platinum-print-contrast-test/Platinum print Contrast test. This note was written based on this PDF file, which is generated by AI. It is told that the ratio of chlorate decides the contract of Platinum print.…Tue, 25 Aug 2026 00:00:00 GMThttps://midtonelab.com/notes/what-these-notes-are-for/https://midtonelab.com/notes/what-these-notes-are-for/The working notes behind StepWedgeDensitone and AltProcessDensitone — measurement, digital negatives, and alt-process printing.Fri, 21 Aug 2026 00:00:00 GMTannouncementshttps://midtonelab.com/notes/platinotype-mixing-day/https://midtonelab.com/notes/platinotype-mixing-day/Mixing Day: Preparing Platinum Sensitizer Solutions 4/12/2026 Yutaka Suzue I have been planning to mix my stock solutions for platinum printing. Today I finally had a chance to…Sun, 12 Apr 2026 00:00:00 GMThttps://midtonelab.com/notes/uv-light-box/https://midtonelab.com/notes/uv-light-box/Building a 365 nm UV Light Box with ESP32 Timer Control Introduction Alternative Process becomes relatively handy once you have an UV light source, offering greater consistency…Sun, 14 Dec 2025 00:00:00 GMThttps://midtonelab.com/notes/auto-shutter-release-timer/https://midtonelab.com/notes/auto-shutter-release-timer/I often use very small apertures—f/32, f/45, or even smaller—when I shoot with my 4×5 camera. With ASA 100 film, this easily leads to long exposures using a bulb shutter: four…Sat, 13 Dec 2025 00:00:00 GMThttps://midtonelab.com/notes/kallitype-developers-measurement/https://midtonelab.com/notes/kallitype-developers-measurement/Kallitype Developers Comparison 5/13/2023 Yutaka Suzue Introduction There are many numerous developer recipes for Kallitype. And even some basic developers can result the variety…Sat, 13 May 2023 00:00:00 GMT