---
title: "Film Washi E 4x5"
url: https://shop.neoanaloglab.com/en/products/washi-e-4x5
language: en
description: "Twelve 4x5 sheets of ISO 3 red-sensitive circuit-board film, processed like RC printing paper and loaded under a green safelight — a red one will fog it."
---

# Film Washi E 4x5

Film Washi · Film · 4x5 / 12 sheets / ISO 3

- Price: ¥4,580 (JPY, consumption tax included)
- Availability: Sold out
- Condition: New
- SKU: WASH-FILM4X5-E-ISO-3
- GTIN / JAN: 3770027506041
- Ships outside Japan: No, Japan only

## Description

Twelve 4x5 sheets of ISO 3 red-sensitive circuit-board film, processed like RC printing paper and loaded under a green safelight — a red one will fog it.

"E" is an industrial phototooling stock — the film PCB imagesetters expose to make printed circuit board masters — which Film Washi buys by the industrial roll and cuts into 4x5 sheets, twelve to a pack. Because those imagesetters write with a red laser, the emulsion is red-sensitive with a stated maximum around 700 nm and no sensitivity to green whatsoever, the mirror image of an orthochromatic film. So the darkroom rule inverts: the datasheet specifies a GREEN 500 nm safelight, and the red safelight you would normally load ortho sheets under will fog this film. Load holders under green light or in complete darkness — bottom to top, with the notch in the upper right corner. Film Washi rates it 3 ISO / 6° DIN with very fine grain and strong contrast, machine-coated onto a blue polyester base 175 µm thick, about twice the 100 µm base of its other converted films; the sheets are noticeably stiff and the finished negative carries a blue transparent base rather than a clear one. The maker publishes no developer, dilution or time — its only processing instruction is that the film can be processed like a classic RC photo printing paper, which makes tray development the natural approach. At ISO 3, exposures are long: sunny-16 arithmetic puts a bright sunlit subject at roughly a quarter second at f/16, so the tripod is not optional, and green areas of a scene record very dark — Film Washi recommends the film for still life and portraiture rather than landscape.

## Specifications

| Specifications | |
| --- | --- |
| Format | 4x5 in sheet film |
| Sheets | 12 sheets per pack |
| Speed | ISO 3 (6° DIN) |
| Process | Black and white negative |
| Base | Blue polyester, 175 µm |
| Spectral sensitivity | Red-sensitive, maximum 700 nm; no green sensitivity |
| Safelight | Green 500 nm, or total darkness — a red safelight will fog it |
| Development | As for classic RC printing paper (paper developer, stop, fix); Film Washi publishes no times |
| Holder loading | Bottom to top, notch in the upper right corner |
| Grain | Very fine |
| Contrast | Strong |
| Coating | Industrially machine-coated stock, cut to 4x5 by Film Washi |

## 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_e_4x5/E4X5_product_00.jpg

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Prices and stock as of: 2026-10-20T03:58:30.900Z · https://shop.neoanaloglab.com/en/products/washi-e-4x5