---
title: "Film Washi \"F\" 135"
url: https://shop.neoanaloglab.com/en/products/washi-f-135
language: en
description: "A medical fluorographic X-ray film — the stock used for mass lung screening — industrially coated, then converted to 135 by Film Washi in Brittany."
---

# Film Washi "F" 135

Film Washi · Film · 135 / 24 exposures / ISO 100

- Price: ¥2,680 (JPY, consumption tax included)
- Availability: In stock (5)
- Condition: New
- SKU: WASH-FILM135-F-ISO-100
- Ships outside Japan: Yes, by Japan Post
- Buy: [Checkout page](https://shop.neoanaloglab.com/buy/WASH-FILM135-F-ISO-100:1?context/language=en) — Opens a confirmation page; stock is reserved and payment is taken only when the buyer continues to Stripe Checkout.

## Description

A medical fluorographic X-ray film — the stock used for mass lung screening — industrially coated, then converted to 135 by Film Washi in Brittany.

"F" is not a photographic film by design: it is a fluorographic X-ray film, the stock used for mass lung screening, coated in another factory by machine and converted to camera formats by Film Washi in Brittany. Unlike the duplitized dental and medical sheet film photographers usually repurpose, it carries a single emulsion on one side of a 100 µm polyester base, so it needs no special regime and develops as an ordinary black and white negative in ordinary chemistry. Film Washi publishes 9 min in Rodinal 1+25, 8 min in Ilfotec LC29 1+19, 11 min in D-76 1+1 and 4.5 min in HC-110 dilution A, all at 20 °C, and instructs you to fall back on Ilford FP4 times and dilutions for any developer not on that list. There is no anti-halation layer, so highlights bloom back through the base as a soft halo; the datasheet rates the grain high and the contrast medium, and notes the diffusion is markedly stronger in 135 than in 120 and changes with the angle of the light. The same missing layer pipes light down the roll, so Film Washi instructs you to load in shade and shoot six blank frames before your first picture, and to keep the cassette in a dark bag before and after shooting. It is orthochromatic, sensitive to a maximum of 575 nm: reds record dark, and a red safelight is permitted — one of the few Washi stocks you can develop by inspection. It ships in a recycled cassette with no DX code, so set ISO 100 by hand; Film Washi does not recommend recycled cassettes in fully automatic or motorised cameras. Sellers describe the medical base as blue-tinted where the datasheet says only "polyester, 100 µm", and photographers report the emulsion is thin and awkward on a developing reel — handle the wet film by its edges and judge the result after scanning and inversion, not on the light table.

## Specifications

| Specifications | |
| --- | --- |
| Format | 135 / 24 exp |
| Speed | ISO 100 |
| Process | Black and white negative |
| Base | Polyester, 100 µm, single-coated |
| Spectral sensitivity | Orthochromatic, maximum 575 nm |
| Safelight | Red |
| Development | 20 °C — Rodinal 1+25 9 min / Ilfotec LC29 1+19 8 min / D-76 1+1 11 min / HC-110 dil. A 4.5 min; otherwise use Ilford FP4 data |
| Cassette | Recycled, no DX code — set ISO by hand; not recommended in fully automatic or motorised cameras |

## Shipping and returns

- Free shipping within Japan on orders of 15,000 JPY or more.
- Roll film ships free from 3 rolls of 135 or 5 rolls of 120.
- Otherwise 500 JPY for small tracked roll-film parcels and 900 JPY for other tracked shipments.
- Orders ship within 2-5 business days after payment is confirmed (weekends and Japanese holidays not counted). Delivery within Japan usually takes 1-2 days (2-4 for small roll-film parcels).
- Ships to 165 countries and regions by Japan Post at Japan Post's own postage (International Air Packet, International Parcel by air, EMS), priced by destination and packed weight.
- Returns: Within 30 days of delivery. Change-of-mind returns must be unopened and unused; damaged or defective items are accepted even if opened.

## Questions

- **Does film need to be refrigerated?** Store unexposed film in a cool, dark place away from heat and humidity. For storage beyond a few months, refrigeration below 10°C is recommended. Let film return to room temperature in its packaging for 2-3 hours before shooting to avoid condensation.
- **What is the difference between C-41, E-6, and black-and-white processing?** C-41 develops color negative film, E-6 develops reversal (slide) film, and black-and-white negative film uses dedicated B&W chemistry. The Neo Analog Lab mail-in processing service handles C-41, E-6, ECN-2, and black-and-white.
- **What is the difference between 135 and 120 film?** 135 is standard 35mm cassette film, usually 24 or 36 exposures. 120 is medium-format roll film: about 16 frames at 6x4.5, 12 at 6x6, or 10 at 6x7. Check which format your camera takes before ordering.

## Images

- https://shop.neoanaloglab.com/product-images/products/prod_washi_f_135/F135_product_00.jpg

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Prices and stock as of: 2026-10-20T03:11:51.549Z · https://shop.neoanaloglab.com/en/products/washi-f-135