---
title: "Film Washi \"W\" 4x5"
url: https://shop.neoanaloglab.com/en/products/washi-w-4x5
language: en
description: "Twelve 4x5 sheets of the same orthochromatic ISO 25 emulsion, hand-coated on 28 g/m² Kozo washi and loadable under a red safelight."
---

# Film Washi "W" 4x5

Film Washi · Film · 4x5 / 12 sheets / ISO 25

- Price: ¥6,280 (JPY, consumption tax included)
- Availability: Sold out
- Condition: New
- SKU: WASH-FILM4X5-W-ISO-25
- Ships outside Japan: No, Japan only

## Description

Twelve 4x5 sheets of the same orthochromatic ISO 25 emulsion, hand-coated on 28 g/m² Kozo washi and loadable under a red safelight.

The 4x5 sheets carry the same emulsion as the 120 roll: an orthochromatic black-and-white layer hand-coated onto Moriki Paper's Tosa Washi, a 28 g/m² Kozo paper, with an anti-curl layer behind it — twelve sheets to a pack. Because the emulsion is orthochromatic (peak 545 nm, high sensitivity to blue, less to green, none to red) the sheets may be handled under a red 575 nm safelight instead of total darkness, which makes holder loading far easier than with panchromatic sheet film. Film Washi's loading instruction is specific: the sheets are more flexible than regular film, so load under safelight with the notch in the upper right corner reading from bottom to top, and make sure the end of the film passes correctly under the top lip of the holder and that the dark slide moves back and forth freely without damaging the film. Nominal speed is 25 ISO, though the maker's own table brackets the working speed from 3 to 25 ISO depending on developer, and the datasheet warns the film does not have a large exposure latitude and is not very sensitive to artificial light; long exposures are no problem, while flash works only at full aperture, close range and set to the lowest sensitivity. Development is a tray process in paper developer under the same red safelight: pre-wash in clear water, 2 to 3 minutes in developer, a plain water rinse with no acid stop bath, fixer until the remaining white emulsion has fully dissolved, then at least 15 minutes in cold clear water with no direct stream on the film. The datasheet rates both texture and contrast as very strong and transparency as medium, so the paper's fibres carry into every sheet; hand coating them one after another creates the small variations Film Washi says contribute to the product's graphic effect, and the emulsion is close enough to a darkroom paper emulsion that the maker says it can also be used as printing paper (grade 3). Film Washi lists "W" among the films that need special handling, so process it yourself or clear it with your lab before shooting. This size is produced in short batches and may require longer production delays, so treat restocks as intermittent rather than continuous.

## Specifications

| Specifications | |
| --- | --- |
| Format | 4x5 in sheet film |
| Sheets | 12 sheets per pack |
| Speed | ISO 25 (maker's table: 3–25 ISO by developer) |
| Process | Black and white negative |
| Base | Kozo washi paper, 28 g/m², medium transparency |
| Spectral sensitivity | Orthochromatic, maximum 545 nm |
| Safelight | Red, 575 nm — load holders under safelight, notch upper right |
| Development | Tray development in paper developer, 2–3 min at 20 °C; no acid stop bath |
| Coating | Hand coated, one sheet at a time |
| Production | Produced in short batches; may require longer production delays |

## 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).
- 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_w_4x5/W4X5_product_00.jpg

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Prices and stock as of: 2026-10-20T04:00:24.958Z · https://shop.neoanaloglab.com/en/products/washi-w-4x5