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Ilford Ilfostop Stop Bath (500ml)

BH #ILISB500ML • MFR #1893870
Ilford
Ilford Ilfostop Stop Bath (500ml)
Key Features
  • Liquid Concentrate
  • Use For Black and White Film
  • Minimal Odor
  • Use for Tank, Tray or Dish Processing
Ilford Ilfostop is a low odor acid stop bath. Normally, when development is completed, films and papers are subjected to a stop bath rinse. This immediately halts the developing process by neutralizing the developer.

Following this, the film or print is exposed to fixer (hypo). The advantage of the stop bath process is that it extends the life of the fixer. Some people do not use stop bath and, in that case, you must use an inordinate amount of fixer to erase the effects of the developer. If a stop bath is not available or chosen, the film or print should be thoroughly soaked in a water bath or rinse - with frequent changing of the water supply. Stop bath gives you the assurance that your developing stage is completely "over" and that none of the developer will be carried over to the fixer.

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Ilford Ilfostop Overview

Ilford Ilfostop is a low odor acid stop bath. Normally, when development is completed, films and papers are subjected to a stop bath rinse. This immediately halts the developing process by neutralizing the developer.

Following this, the film or print is exposed to fixer (hypo). The advantage of the stop bath process is that it extends the life of the fixer. Some people do not use stop bath and, in that case, you must use an inordinate amount of fixer to erase the effects of the developer. If a stop bath is not available or chosen, the film or print should be thoroughly soaked in a water bath or rinse - with frequent changing of the water supply. Stop bath gives you the assurance that your developing stage is completely "over" and that none of the developer will be carried over to the fixer.

Ilfostop contains an indicator dye that is pH sensitive and changes color from yellow to purple as the stop bath becomes exhausted. It is specifically recommended for dish and tray processing of paper or deep tank processing of film.

It should be noted that Ilford recommends that gloves, eye protection, apron or overall be worn when handling and mixing all chemicals.

Note:
Never let developer become contaminated with a stop bath solution
Ilfostop concentrate will keep for 5 years in full airtight bottles and 12 months in half full tightly capped bottles
It will stay fresh as a working solution for 7 days
500ml will make 10 liters of working solution
A full working strength solution will produce 150 135-36 or 120 films or 600 20.3x25.4cm (8x10") RC prints or 300 20.3x25.4cm (8x10") FB prints
UPC: 019498893872

Ilford Ilfostop Specs

Chemistry TypeStop Bath
Powder/LiquidLiquid
Liquid Volume1 x 16.9  fl oz / 500.0  mL
Packaging Info
Package Weight1.34 lb
Box Dimensions (LxWxH)6.7 x 2.85 x 2.2"

Ilford Ilfostop Reviews

#2 stop bath

By Matt
Rated 4 out of 5
Date: 2022-09-12

Great stop bath, works wonderfully, easy to mix, good shelf life, works far past the expiry date. only better stop bath is Kodak Indicator Stop Bath, wich sadly cannot be shipped, so I would suggest that if you live near a camera shop. Otherwise, or if you use all Ilford chemicals, Great choice.

Perfect for the darkroom printing

By Maria
Rated 5 out of 5
Date: 2022-01-12

As an avid darkroom printer, I rely on good products. Ilford Stopbath is reliable, excellent.

looking forward to trying it

By James
Rated 4 out of 5
Date: 2021-12-06

looking forward to trying it

Works great!

By Dale
Rated 5 out of 5
Date: 2021-06-21

I've been using Ilford Stop Bath for years. Always works great. Never had a problem with this stop bath.

This is my 1st time

By Glen
Rated 5 out of 5
Date: 2021-06-20

I normaly use Kodak's stop bath (I think B&H was sold out that day) but this Illford brand seems to work just fine and I think it cost a few pennies less. So its like having a coupon

This is my 1st time

By Glen
Rated 5 out of 5
Date: 2021-06-20

I normaly use Kodak's stop bath (I think B&H was sold out that day) but this Illford brand seems to work just fine and I think it cost a few pennies less. So its like having a coupon

I mean, it's Ilford. 5* obv

By Spam Account
Rated 5 out of 5
Date: 2022-06-17

What else do you need to know? It works flawlessly, and Ilford is a lovely company.

No smell, odorless, works

By Franklin
Rated 5 out of 5
Date: 2022-02-23

Great value. Color indicator (will change color!, and most importantly- odorless. Works like a charm. Recommended

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question

How to dispose contents of half used ILFOSTOP bottle which has stayed in shelf for several years. To sewer?
Asked by: Anonymous
You should be able to dispose of this by putting it down the drain. As the other shopper mentioned, it might be good to flush it down once you do that, but it shouldn't be a problem with stop bath. The main darkroom chemical you need to be careful of disposing of is fixer. And if you google kodak environmental guidelines for darkroom you'll find even more info (sorry they wouldn't let me insert a link).
Answered by: Esther K.
Date published: 2018-08-27

After mixing the concentrate with water. What is ...

After mixing the concentrate with water. What is the maximum time to be able to reuse it again?
Asked by: Fayad
The working strength is good for 7 days.
Answered by: Kirk
Date published: 2021-07-26

question

msds sheet ?
Asked by: Anonymous
The following is a link to the PDF version of the MSDS for the Ilford Ilfostop Stop Bath. http://bit.ly/1bI5KJb
Answered by: Christina S.
Date published: 2021-04-02

question

1. Can stop bath be reused?2. For a 500ml bottle of concentrate, whats the best way to use and preserve? mix per use? how much fits in a tank? do i get a new empty bottle and mix diluted in there and pour back in there after use?
Asked by: tone V.
Yes, IlfoStop can be reused until the indicator dye goes from yellow to purple. The concentrate will keep for 5 years in a full airtight bottle and 12 months in a half full tightly capped bottle. In working strength, it provides 7 working days. The amount that goes in the tank depends on how many rolls are being developed or the size of the print. A new empty bottle should be used to store the chemical after being mixed and once it has been used for development for reuse at a later date.
Answered by: Kirk
Date published: 2021-07-26

question

I'm new at this so when it says 1+19, how much stop bath and how much water am I exactly mixing?
Asked by: Anonymous
It's easiest to figure out how much water you need first. I use a plastic cup for my stop solution that's 400ml. Knowing that I take 400 and divide it by 19 and end up with 21. Working solution = 400ml water + 21ml Stop.
Answered by: Chris H.
Date published: 2019-02-21

question

If I use it on b&w films development,does it also request 20 degree temperature?
Asked by: Kinhang F.
It is not as critical as developer temperature. Here is what the instructions say:ILFORD ILFOSTOP 10 seconds About 20C/68Fstop bath diluted 1+19 preferably nowarmer than25C/79F and nocooler than15C/59F
Answered by: Serge T.
Date published: 2019-03-08

question

Can I use this stop bath on paper as well as film?
Asked by: Paige T.
Yes
Answered by: Scott E.
Date published: 2020-02-10

question

After mixing 1:19, how long to leave the film exposed to the stop solution before fixing?
Asked by: Paul
30 seconds with continue agitation. I am chemist. You are neutralizing using a week acid, if your time goes some seconds over it does not have huge impact.
Answered by: Javier O.
Date published: 2018-08-27
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