J. Lane Pre-Coated B&W Glass Speed Plates ISO 25 - 5x7/10 PackModel: 181570
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J. Lane 5x7 plates are sized 126mm x 177mm, designed to fit dry plate holders from the era of dry plate photography. The plates are larger in width and length than modern sheet film and will not fit modern wet plate holders. Please verify your plate holder dimensions. If you need dry plates to fit modern wet plate holders, custom sizes are readily available.
Gelatin dry plate photography dates from the 1870's, when silver halide photographic emulsion was hand-poured onto glass plates and allowed to dry, prior to use as a negative. The development of dry plate negatives made photography more convenient than the wet plate process of the Civil War era - which required the negative to be exposed and developed onsite.
With dry plate photography, the need for a portable darkroom was eliminated, making photography more accessible and allowing more people to become amateur photographers. When Kodak started producing “modern” film by coating flexible celluloid in the late 1800's, the use of glass as a substrate was rendered obsolete. Dry plate photography faded out of common use, by the late 1920s.
"I make my own dry plates for my photography, and have been doing so for several years. I've developed a recipe that I like, and, when coated, the plates come out beautiful. I like the look of this basic emulsion so much that I decided to start selling them to share with other photographers interested in the process." – Jason Lane, founder of Pictoriographica and creator of J. Lane Dry Plates
The ASA 25 Orthochromatic plates (Speed Plates) are coated with an ultra fine-grain, high contrast orthochromatic emulsion, with response from UV through the visible spectrum up to 610nm. The high contrast is excellent for alternative process printing or for printing onto multigrade paper at grade 0. The long toe of the characteristic curve preserves shadow details for scanning. As with other primitive processes, the effective speed of the plate will vary depending on actual UV levels. The emulsion has been designed to meter at ASA 25 under early spring northward lighting at moderate latitudes, but expect actual speed to vary by up to a stop or more.
They are packed 10 to a box. These are hand-coated onto hand-cut glass. The glass edges are ground for safety but please handle carefully. The edges of the plate are notched very similar to how sheet film is notched, so you can orient by feel in complete darkness if you don't have a safe light. Each plate is inspected, visually, after coating. Even so, be aware that there might be minor flaws in the emulsion which will add character to the final product.
Handle carefully during development. The emulsion is fragile while wet. It holds up well enough during the development process, but any agitation should be gentle.
You will need to acquire a plate holder (too thick for film holders). The plates will work in any 5x7 camera.
- Gelatin coated glass dry plates
- 25 ASA
- Actual Plate Dimensions (Length x Width): 126mm x 177mm / 4.961 in. x 6.969 in.
- Plate thickness: 1.3 mm / 0.050 in.
|Speed (ISO)||25 ISO|
|Product Instructions||J. Lane Pre-Coated B&W Glass Speed Plates|