Tim Layton Dry Plate Diary Exposure & Development RecordTim Layton Dry Plate Diary Exposure & Development Record

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MY DRY PLATE EXPOSURE DIARY

In this section, I share dry plates that I have exposed and share the technical details and other information that will be helpful for you if you want to use dry plates.  I include an analysis and observations section that should prove to be very helpful.

HODGSON MILL

Date: 06/05/21

Time: 9:00 AM CT

General Conditions: sunny with a few clouds

Temperature: 80F

Dry Plate Info: ASA 2 Ordinary Emulsion Plate

Metered Value: ISO 2 at F16 1s  

Exposed Value: ISO 1 at F16 2s

Development: HC-110 Dilution B (8ml developer in 250ml water) for 7 minutes 

Hodgson Mill Silver Gelatin Dry Plate Ordinary Emulsion ISO 2 by Tim LaytonHodgson Mill Silver Gelatin Dry Plate Ordinary Emulsion ISO 2 by Tim Layton Hodgson Mill Silver Gelatin ASA 2 Dry Plate by Tim LaytonHodgson Mill Silver Gelatin ASA 2 Dry Plate by Tim Layton Tim Layton Sr at Hodgson Mill 6-5-21Tim Layton Sr at Hodgson Mill 6-5-21

Hodgson Mill 6-5-21 by Tim LaytonHodgson Mill 6-5-21 by Tim Layton

ANALYSIS & OBSERVATIONS

This is the first day that I used the J Lane Ortho Speed Plates, and so I was not sure what to expect.  I decided to shoot the plate one stop slower to ensure that I hopefully gave it enough time.  For a properly exposed ordinary emulsion plate, I typically develop for about 5 to 5 1/2 minutes.  I knew based on the shadow values and highlights that this plate was under exposed and so I ended up developing for 7 minutes as a means to help compensate for the under exposure.  I think the real speed of this plate for this exposure was more like ASA 0 vs. the box speed of ASA 2. 

I am very happy with the final edited image above from the plate.  It has a calming and natural feeling to it like I am transported back to the late 19th century.

Look closely at the colors in the iPhone photos above and compare to the plate.  This will help you understand how the silver gelatin ordinary emulsion, especially reds/oranges and greens that are typical in many scenes.  

I am excited to return to Hodgson Mill again in the near future and expose some more plates and try some different compositions.  I want to also take my vintage 100+ year old Kodak 3A camera back because the format is wider than a 4x5 large format camera and I think it may suit this scene very well.  

SPECIAL NOTES & COMMENTS

I photographed the dry plate on my Kaiser light table using my iPhone 12.  I used Photoshop Express to invert the photo to make the positive that you see above.  


ALLEY SPRING & MILL

Date: 06/05/21

Time: 3:15 PM CT

General Conditions: sunny with a few clouds

Temperature: 85F

Dry Plate Info: J Lane Ortho 25 Speed Plate

Metered Value: ISO 25 at F32 1/2s  

Exposed Value: ISO 12 at F32 1s

Development: HC-110 Dilution A (16ml developer in 250ml water) for 6 minutes 

Alley Spring & Mill 6/5/21 by Tim LaytonAlley Spring & Mill 6/5/21 by Tim Layton

ANALYSIS & OBSERVATIONS

This is the first day that I used the J Lane Ortho Speed Plates, and so I was not sure what to expect.  I decided to shoot the plate one stop slower to ensure that I hopefully gave it enough time.  By the time that I developed this plate, I had already developed several other plates at Dilution B in HC-110 and I could tell the plate was under exposed at ISO 12, so I decided to make the developer more active by moving to Dilution A, effectively doubling the developer volume.

I really wanted to use a yellow number 8 filter for this scene to maybe even try and get some cloud detail and better color separation, but I couldn't make that happen for this exposure.  It is a good thing that I didn't because it turns out that you need to add an additional 3 to 4 stops of exposure for the ortho emulsion when using a yellow number 8 filter, effectively making the plate in the ISO 1 to 3 range.  I would have grossly underexposed it and no amount of developer juicing would have saved that plate. 

I will return to Alley Springs Mill again with another Ortho 25 plate and yellow filter and I will share my results with you.  I will also take one of my own hand poured ordinary emulsion plates that typically meter in the ISO 1 to 3 range and when I add the yellow filter for the second plate, I will be on the negative side of the ISO rating.   

It will be a good comparison to see the Ortho 25 versus Ordinary emulsion plates side by side to review how the emulsion renders the scene.

Look closely at the colors in the iPhone photo above and compare to the plate.  This will help you understand how the silver gelatin ortho sensitized emulsion without a yellow number 8 filter renders tones, especially reds/oranges and greens that are typical in many scenes. The sky is the classic Victorian white as I expected it would be. 

SPECIAL NOTES & COMMENTS

I photographed the dry plate on my Kaiser light table using my iPhone 12.  I used Photoshop Express to invert the photo to make the positive that you see above.  


MY DRY PLATE EXPOSURE METER

I use a light meter app on my iPhone called "Photo Light & Exposure Meter" by Paul Bukhonov because this specific application allows for an ISO value of 1 and allows for 1/3 stop increments, which makes my life easier.  I use the premium version so all of the features are unlocked and no ads. 

If you want to get a little more sophisticated, you could place a # 47 blue filter in front of your camera/phone because this will be a lot closer to what the emulsion actually records.  Don't forget to compensate for the filter factor of your specific blue filter. 


MY DRY PLATE DEVELOPMENT PROCESS

Develop in Kodak HC-110 Dil. B under 1-A Red Safelight by Inspection @ 20C in a Tray

** Agitate First 30 Seconds, Then 15 Seconds Every Minute Until Completion

Regular Acid Stop Bath For 15 Seconds

Rapid Hardening Fixer For 5 Min**

Tap Water Bath Rinse For 30 Seconds & Inspect Plate

Hypo Clearing Agent Bath For 4 Minutes**

Final Wash in Slow Running Tap Water For 5 Minutes

Dip in Distilled Water & Photo Flo 200 Bath

Wick Water Droplets From Bottom Right Corner 

Place in Drying Rack & Let Fully Dry Before Further Handling

**Unofficial HC-110 Resource Page


Dry Plate Exposure Recommendations

For J Lane ASA Ordinary Emulsion Dry Plates:

- Add 50% exposure time above 45 seconds

- Double exposure time above 2 minutes

- Add 3 to 4 Stops if you use a Yellow # 8 filter

For J Lane ASA 25 Ortho Speed Plates:

- Add 50% exposure time above 4 seconds

- Double exposure time above 10 seconds

- Add 3 to 4 Stops if you use a Yellow # 8 filter

General Tips & Guidance

I rarely find the J Lane plates to perform at box speed just like modern day film.  I suggest adding at least 1 to 2 stops to your time to ensure you are giving your plate enough exposure.  During the develop by inspection process, you can pull the tray if your highlights and shadows are blocking up too much.  If you don't have time to expose a couple test plates before your outing, then I suggest exposing two plates of your first scene and develop the first one using the standard dilution and figure out if you need to make the developer more or less active to help compensate for your over or under exposure. 

 

* ASA 2 Plates are ordinary emulsion (colorblind) 

** ASA 25 Speed Plates are Orthochromatic (up to 610nm)


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