---
title: "Paterson Changing Bag"
url: https://shop.neoanaloglab.com/en/products/paterson-changing-bag
language: en
description: "A double-skin, light-tight bag that lets you load a film into a developing tank without having to find a darkroom first. It is also what you reach for when a film jams, or has been only partly exposed, and has to come out of the camera in complete darkness."
---

# Paterson Changing Bag

Paterson · Archive & utility · Double-skin changing bag / W640 × L700 mm / load film without a darkroom

- Price: ¥6,300 (JPY, consumption tax included)
- Availability: Sold out
- Condition: New
- SKU: PATE-ACCTOOL-CHANGING-BAG
- Ships outside Japan: No, Japan only

## Description

A double-skin, light-tight bag that lets you load a film into a developing tank without having to find a darkroom first. It is also what you reach for when a film jams, or has been only partly exposed, and has to come out of the camera in complete darkness.

Paterson describes the bag as a fail-safe double skin with a zip closure, elasticised arm apertures and a comfortable lining, the inner lining being specially designed to avoid perspiration in prolonged use. At W640 × L700 mm it is large enough to allow a camera back to be fully opened once inside, and still small enough to fit into a camera bag. If you work with large tanks or sheet-film holders, measure them against those dimensions before you order, so you know your whole kit has room inside. And if this is your first time working blind, wind a scrap film onto the reel a few times in daylight before you try it inside the bag.

## Specifications

| Specifications | |
| --- | --- |
| Type | Double-skin light-tight changing bag |
| Size | W640 × L700 mm (manufacturer stated) |
| Construction | Fail-safe double skin with zip closure |
| Arm openings | Elasticised arm apertures; lining designed to avoid perspiration in prolonged use |
| What it is for | Loading a film into a developing tank without a darkroom; removing a jammed or partly exposed film from the camera |
| Model code | PTP125 |

## 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

- **How do I choose negative sleeves?** For 135 film the standard page holds 7 strips of 6 frames; for 120, pages hold 3-4 strips. For long-term storage choose acid-free material that passes the Photographic Activity Test (PAT).
- **What size trays do I need?** Use trays one size larger than your paper, and plan on 3-4: developer, stop bath, fixer, and a holding/wash tray.
- **How should negatives and prints be stored?** Aim for a dark, stable environment around 20°C and 30-50% relative humidity, avoiding rapid temperature and humidity swings.

## Images

- https://shop.neoanaloglab.com/product-images/products/prod_paterson_changing_bag/pate_changing_bag_00.jpg

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Prices and stock as of: 2026-10-20T03:58:57.058Z · https://shop.neoanaloglab.com/en/products/paterson-changing-bag