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Cellulose & Rag Substrates

The material science of lignin-free papers and the role of alkaline buffering in preserving the integrity of analog prints.

12 Articles

Latest in Cellulose & Rag Substrates

Chromogenic Degradation: Stability of 19th Century Organic Pigments
Cellulose & Rag Substrates
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April 8, 2026
Chromogenic Degradation: Stability of 19th Century Organic Pigments

A technical analysis of the chemical stability and archival preservation of 19th-century organic pigments used in carbon prints and photogravures.

Lignin-Free vs. Wood-Pulp: 150 Years of Archival Stability
Cellulose & Rag Substrates
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April 1, 2026
Lignin-Free vs. Wood-Pulp: 150 Years of Archival Stability

A technical comparison of 100% cotton rag and industrial wood-pulp papers, examining the chemical mechanisms of degradation and the archival standards required for long-term stability.

Verification of Latent Image Formation: Comparing Gelatin Emulsion Standards
Cellulose & Rag Substrates
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March 26, 2026
Verification of Latent Image Formation: Comparing Gelatin Emulsion Standards

This article examines the complex chemical and physical processes of latent image formation, from the Gurney-Mott theory of 1938 to the archival standards of gelatin purity and cellulose substrates.

The Klic Process: A History of Copper-Plate Heliogravure
Cellulose & Rag Substrates
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March 23, 2026
The Klic Process: A History of Copper-Plate Heliogravure

An exploration of Karl Klic’s 1879 invention of copper-plate heliogravure, detailing the chemical etching of gelatin reliefs and the archival importance of lignin-free cellulose substrates.

Countering Acid Hydrolysis: The Role of Alkaline Buffers in Archival Papers
Cellulose & Rag Substrates
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February 10, 2026
Countering Acid Hydrolysis: The Role of Alkaline Buffers in Archival Papers

A technical examination of how alkaline buffering agents like calcium carbonate prevent acid hydrolysis and preserve the structural integrity of archival paper substrates.

Alkaline Buffering Agents: Mitigating Acid Hydrolysis in Cellulose Rag
Cellulose & Rag Substrates
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January 18, 2026
Alkaline Buffering Agents: Mitigating Acid Hydrolysis in Cellulose Rag

An exploration of how alkaline buffering agents like calcium carbonate protect cellulose rag papers from acid hydrolysis and archival degradation.

Silver Halide Precipitation: The Maddox Revolution of 1871
Cellulose & Rag Substrates
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January 8, 2026
Silver Halide Precipitation: The Maddox Revolution of 1871

Richard Leach Maddox's 1871 invention of the silver bromide-gelatin emulsion revolutionized photography by replacing wet collodion plates with stable, pre-manufactured dry plates.

Silver Halide Precipitation: The Chemical Foundations of Gelatin Emulsion
Cellulose & Rag Substrates
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January 4, 2026
Silver Halide Precipitation: The Chemical Foundations of Gelatin Emulsion

A technical exploration of the colloidal chemistry, silver halide precipitation, and material science required for the creation and archival preservation of light-sensitive gelatin emulsions on cellulose substrates.

The Evolution of Photogravure: From Henry Fox Talbot to Karl Klic
Cellulose & Rag Substrates
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December 10, 2025
The Evolution of Photogravure: From Henry Fox Talbot to Karl Klic

Explore the evolution of photogravure from Henry Fox Talbot's 1852 patent to Karl Klic's refinements, focusing on the technical chemistry of image reproduction and archival science.

From Wood Pulp to Cotton Rag: Evaluating 19th-Century Substrate Longevity
Cellulose & Rag Substrates
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December 7, 2025
From Wood Pulp to Cotton Rag: Evaluating 19th-Century Substrate Longevity

This technical analysis examines the 19th-century transition from cotton rag to wood pulp substrates and its profound impact on the chemical stability and longevity of photographic records.

The Micro-Topography of Etched Copper Plates in Printing
Cellulose & Rag Substrates
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November 11, 2025
The Micro-Topography of Etched Copper Plates in Printing

This article explores the technical intricacies of the 1880s Klic photogravure process, focusing on the microscopic topography of copper plates and the material science of archival printing.

The Evolution of Photogravure: From Niepce to Goupil & Cie
Cellulose & Rag Substrates
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October 16, 2025
The Evolution of Photogravure: From Niepce to Goupil & Cie

An in-depth analysis of the transition from early heliography to industrial photogravure, focusing on the chemical and mechanical processes developed by Ni)pce and Goupil & Cie.

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