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Changes in Ilford Multigrade Classic Glossy

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Steve Goldstein

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Over the last few years I've gone through at least a half dozen (probably more) 50- and 100-sheet boxes of 11x14 Ilford Multigrade Classic and Warmtone (always glossy). This note describes differences I noticed between paper from 100-sheet boxes of Multigrade Classic I purchased in May 2025 and April 2026.

There were a lot of physical differences - the newer paper felt finer (I can't find a better word than this), slightly smoother and thinner, and just a bit more pliant and limp. It reminded me of some Foma paper I'd used a few months ago. Measuring the thickness with my Starrett vernier revealed that the new paper was very slightly thinner than the old: 0.0115" for the old and 0.0112"-0.0113" for the new.

The two papers also curled differently. The old paper's out-of-the-box curl was in the long direction, i.e. the two long edges curled towards each other. The new paper curled the other way, short edge towards short edge.

The papers expanded differently when wet. The old paper grew more in the short dimension while the new grew more in the long direction. When placed atop one another, wet sheets of old and new were clearly different, with the long edge of the new paper about 1/4" longer than the old, and the short edge of the old paper a bit longer than the new. They were the same size after drying.

I also ran test strips since I was in the middle of a short series of supposed-to-be-identical prints. Where the old paper had required a 12-second exposure, the new needed 13 seconds to reach the same mid-tone density. Contrast, at least with an Ilford 2-1/2 filter, appeared identical, as did image color and response to toning (not much, if I'm honest), it's just that prints on paper from the new box needed about 8% more exposure to match those from the older box. This is the first time I'd ever run into this - all prior boxes had always matched each other quite closely.

This isn't a complaint. Ilford's (and Foma's) papers remain excellent products, and the physical differences aren't of any practical consequence. But from now on I'll always run test strips if I have to switch to a new box of paper mid-stream.
 
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I wonder how much variation is normal in paper thickness? I've been using mostly Fomatone of late. Just a phase I'm in.

I have so darn much paper. I've been lazy I need to get busy and print.

The dimension of the cut sheet 1/4" variation is crazy .
 
Over the last few years I've gone through at least a half dozen (probably more) 50- and 100-sheet boxes of 11x14 Ilford Multigrade Classic and Warmtone (always glossy). This note describes differences I noticed between paper from 100-sheet boxes of Multigrade Classic I purchased in May 2025 and April 2026.

There were a lot of physical differences - the newer paper felt finer (I can't find a better word than this), slightly smoother and thinner, and just a bit more pliant and limp. It reminded me of some Foma paper I'd used a few months ago. Measuring the thickness with my Starrett vernier revealed that the new paper was very slightly thinner than the old: 0.0115" for the old and 0.0112"-0.0113" for the new.

The two papers also curled differently. The old paper's out-of-the-box curl was in the long direction, i.e. the two long edges curled towards each other. The new paper curled the other way, short edge towards short edge.

The papers expanded differently when wet. The old paper grew more in the short dimension while the new grew more in the long direction. When placed atop one another, wet sheets of old and new were clearly different, with the long edge of the new paper about 1/4" longer than the old, and the short edge of the old paper a bit longer than the new. They were the same size after drying.

I also ran test strips since I was in the middle of a short series of supposed-to-be-identical prints. Where the old paper had required a 12-second exposure, the new needed 13 seconds to reach the same mid-tone density. Contrast, at least with an Ilford 2-1/2 filter, appeared identical, as did image color and response to toning (not much, if I'm honest), it's just that prints on paper from the new box needed about 8% more exposure to match those from the older box. This is the first time I'd ever run into this - all prior boxes had always matched each other quite closely.

This isn't a complaint. Ilford's (and Foma's) papers remain excellent products, and the physical differences aren't of any practical consequence. But from now on I'll always run test strips if I have to switch to a new box of paper mid-stream.

The differences you note in curl and dimension changes are due to the grain direction of the paper. It is possible that Ilford has more than one source for the base and the grain direction of the master rolls could vary. Or someone mistakenly cut the paper with the grain going differently.
 
The differences you note in curl and dimension changes are due to the grain direction of the paper. It is possible that Ilford has more than one source for the base and the grain direction of the master rolls could vary. Or someone mistakenly cut the paper with the grain going differently.

The grain direction of a Fourdrinier paper isn't going to change mysteriously. What is much more common is that the width of cut down from master roll will vary for minimum wastage in a given conversion event. e.g. sometimes you'll take an 8" cut for 8x10, other times a 10" cut will be more efficient.


The papers expanded differently when wet. The old paper grew more in the short dimension while the new grew more in the long direction. When placed atop one another, wet sheets of old and new were clearly different, with the long edge of the new paper about 1/4" longer than the old, and the short edge of the old paper a bit longer than the new. They were the same size after drying.
Hardening effects can continue at a low rate for some time.



Where the old paper had required a 12-second exposure, the new needed 13 seconds to reach the same mid-tone density.

Those are the effects of age fog, even if well below visual threshold. This is why the manufacturer has a life expectancy for the paper that is significantly shorter than it is for the fogging to significantly impact contrast and white values.
 
The grain direction doesn't change. What changes is how the paper is cut in relation to the grain, i.e. does the grain run along the long or short dimension of the cut sheet.

What you had said implied that the grain direction of the master roll could vary (it won't, not unless you know of a paper machine with a headbox 1600m wide), and nor will the direction of the slit-to-width doughnuts - the width of those doughnuts relative to the finished cut sheet is what will define the grain direction of the final cut sheets.
 
What you had said implied that the grain direction of the master roll could vary (it won't, not unless you know of a paper machine with a headbox 1600m wide), and nor will the direction of the slit-to-width doughnuts - the width of those doughnuts relative to the finished cut sheet is what will define the grain direction of the final cut sheets.

What I said implied that one supplier could have rolls with the grain running a different direction than another. Unlikely. More likely is the sheets being cut so the grain runs differently, that is sheets can be cut "long grain" or short grain."
 
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