We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Red polypropylene developing tray, 16 by 20 inches, three inches deep with ribbed base and pouring lip

Paterson Photographic

Paterson Photographic 16x20" 3" Deep Red Developing Tray #PTP327R

SKU CH-BZY1-Q88A4

A 16x20 inch, 3 inch deep red polypropylene tray with ribbed base and pouring lip for chemical developing

  • Professional-grade durability from robust polypropylene construction
  • Ribbed base prevents prints sticking for easy removal
  • 3" depth optimises chemical economy during development
  • Patented design secures thermometer against slipping
  • Extra-large pouring lip reduces splash for safer handling

Professional Photo Developing Tray

The Paterson Photographic 16x20" tray is built for darkroom technicians and photography students who process large-format prints. Its robust polypropylene construction resists common developing chemicals and withstands repeated daily use in educational or commercial labs. The three-inch depth holds sufficient solution volume for full-frame development without excessive chemical consumption.

Chemical Resistance and Solution Control

The ribbed base prevents prints from sticking to the surface while adding structural rigidity to the tray walls. A patented thermometer holder keeps temperature probes secure and out of the solution path during agitation. The extra-large pouring lip allows controlled, drip-free emptying and reduces chemical splash when transferring used developer or fixer.

Darkroom Workflow Accessories

The integrated thermometer restraint eliminates the need for separate clips or weights that can damage delicate emulsions. Deep sidewalls and the pouring lip work together to minimise solution loss during print transfers, extending the usable life of each chemical batch. The red colour coding helps operators identify tray purpose at a glance in multi-step processing sequences.

Highlights

  • Professional-grade durability from robust polypropylene construction
  • Ribbed base prevents prints sticking for easy removal
  • 3" depth optimises chemical economy during development
  • Patented design secures thermometer against slipping
  • Extra-large pouring lip reduces splash for safer handling

Specifications

No published specifications for this item yet.

Questions about this item

How do I set up the 16x20" tray so the thermometer stays put during developing?

Rest the thermometer in the patented holder moulded into the tray wall; it locks the stem in place so the probe cannot slide into the chemistry.

What part of the red polypropylene tray wears out first and needs replacing?

The base ribbing that stops prints sticking will eventually smooth down after heavy use, at which point prints may cling and the tray should be swapped.

At what point does the 3" depth stop hiding splash when I agitate large prints?

Vigorous rocking with a full 16x20" sheet displaces enough solution to crest the lip, so splash appears before the chemistry is exhausted.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.