For how many rolls is this fixer? Is it better to make 500 ml mix and keep the powder sheild?

It simply depends on how fast you intend to use the fixer. I have had some I users for over a year (in controlled conditions) and it works well.

When finally mixed into a gallon of water, is this a Stock solution or a (1+1) ratio? For looking at development times.

It's the stock. You will mix it with more water for your 1:1 ratio

How long exactly does it last after mixing it with water? Also, how should the mixture be stored?

It should last indefinitely. No special storage necessary.

Do you have to mix the whole gallon at once, or are there directions to mix smaller batches?

There aren't directions that i know of but online im sure you could find info. I've been doing 1/4th of the bag at a time and just mixing 1/4 of the water it says to mix. This will extend the shelf life of your mixed solution in case you are someone who reuses fixer and doesn't need a huge batch of fixer at once.

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Fixer for paper and film, 1Gallon mix

Product ID: 434394

Details

Brand
Kodak
Compatible Devices
Camera
Film Color
Black and
Film Format Type
120 or 135 or
Model Name
KODAK Fixer

📏1 gallon mix for extended use

🖤Optimized for black & white film

⚗️Powder form for precise mixing

¥11391

Duties & taxes included

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Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Fix your film like a pro — Kodak’s trusted fixer for timeless prints!

BULK 1 GALLON SUPPLY - Stay stocked and ready for all your darkroom projects
PRECISION POWDER MIX - Easily mix to exact working strength for flawless results
TRUSTED KODAK QUALITY - Join thousands of pros with a 4.6-star rated fixer
UNIVERSAL COMPATIBILITY - Perfectly suited for 120, 135, and sheet films & papers
PROFESSIONAL GRADE HARDENING - Ensures durable, archival-quality prints every time

Kodak Professional Fixer is a high-quality, powder-form chemical designed for black and white film and paper processing. It mixes easily to working strength, providing a reliable hardening fixer that supports 120, 135, and sheet film formats. With a 1-gallon mix capacity and a strong 4.6-star user rating, it’s a must-have for serious darkroom enthusiasts and professionals.

Specifications

ASIN	B00009R7A9
Audio Recording	No
Best Sellers Rank	#6 in Darkroom Chemicals
Brand	Kodak
Compatible Devices	Camera
Customer Reviews	4.6 4.6 out of 5 stars (213)
Film Color	Black and White
Film Format	120 or 135 or Sheet
Item Weight	16 ounces
Manufacturer	Kodak
Manufacturer Part Number	1971746
Model Name	KODAK Professional Fixer
Model Number	1971746
UPC	041771971748

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