After years of research (and several not-so-successful attempts) we've got the answer for large large format processing: the SP-8×10! Simple: No frames/holders to fumble with in the dark. Just take
SP-8x10 Daylight Processing Tray for 8x10, 5x7, 4x10, 4x5, and 9x12cm
SP 8x10 intro
Creating the Stearman Press SP-8×10+ film development system - EMULSIVE
SP-8x10 Daylight Processing Tray for 8x10, 5x7, 4x10, 4x5, and 9x12cm – Lincoln Camera Shop Online, LLC
SP-645 Max 4x5 Film Processing System – Stearman Press LLC
批发塑料袋, 聚薄膜-管材,片
STEARMAN PRESS SP Compact 8x10 Film Processing System - analogue photography
Color Processing and the Thermal Profile of the SP-8x10 – Stearman Press LLC
Photographic Supplies – Stearman Press LLC
After years of research (and several not-so-successful attempts) Stearman got the answer for mainly 8x10 large format processing in addition to their
STEARMAN PRESS SP Compact 8x10 Film Processing System
SP 8x10+ Daylight Tray