About this course

How this course was made

Pure Silver was compiled by RunBook Academy using local large language models, as a practical experiment in what that infrastructure can produce. It is not the work of a photographic chemist writing from experience, and it does not claim to be.

The models ran on a small on-premises cluster:

• 2 × NVIDIA DGX Spark
• 1 × GMKtec EVO-X2

The models used to author the site and the course content were:

• Minimax M2.7
• QWEN3.6
• GEMMA4

The content was generated end to end against this local infrastructure. No proprietary cloud API was used to produce the material on this site. The chemistry itself is not the models’ invention: every formula, hazard statement, date and process description was written against a named published source, cited on the page with the date it was read, and the course’s first rule is that where a source could not be found it says so rather than filling the gap.

!What has and has not been reviewed — read this before you handle anything

A full review by a qualified chemist is still pending. What has been done is automated, and runs on every build: twenty checks and a full site build, all of which must pass before anything ships.

They confirm that every page matches the curriculum manifest; that every citation key resolves to the bibliography; that every chemical, formula, process and defect id referenced anywhere has an entry; that every lab, build and experiment carries its template sections, a safety level and an alternative route; that reaction equations balance against known species; that glossary links resolve; that filler, empty headings and unhedged safety language fail the build; and that every internal link works.

Those checks catch a fabricated chemical or a broken link. They do not catch a hazard statement that is plausible and wrong. That distinction matters more here than in most subjects, because several of the substances this course discusses can injure you.

So: treat every safety classification, quantity, dilution and disposal instruction on this site as a starting point to be checked, not as an authority. Before you handle any substance, read the supplier’s own safety data sheet for the product you actually bought, and follow it where it differs from anything written here. Where this course names a limit or a control, it cites the body that set it — go to that source. And if you find something wrong, tell us; a correction with its source attached is the fastest route to a fix.

What the course teaches

Pure Silver is a course in the chemistry, craft and science of traditional photography, and a reference to keep afterwards. Its premise is that the processes of silver-based and historical photography can be understood at the level of light, silver, molecules and materials, and that a photographer who understands them at that level makes better decisions in the darkroom and, in the end, better photographs. It is written for people who love the medium and may have no chemistry beyond school, no electronics and no woodworking, and it teaches what it needs from first principles.

What is in it

29

Parts

230

Pages

4

Levels

434

Hours

7,390

Citations

The course is organised into numbered parts across four levels, with a capstone portfolio at the end, and a reference section that stands on its own: the Formulary, the chemical encyclopaedia, the glossary, the process atlas, the troubleshooting atlas, the safety library and the laboratory planner. The curriculum page lists every page.

The standard

The course’s first rule is that it never invents chemistry. Every formula, hazard statement, historical date and process description is checked against a named source on a stated date, the source is cited on the page and in the sources index, and where something could not be verified the course says so. Its second rule is that it never optimises for size: a page exists because the subject needs it, and a page that could not carry genuine educational weight was merged or cut. Its third is that safety overrides historical authenticity: every practical page is classified, and processes whose original practice depended on mercury, cyanide, uranium or chromium(VI) are taught for their chemistry and history and given no home procedure.

Verified content

Content is checked at build time and before release by a set of automated audits: every page matches the curriculum manifest; every citation key resolves; every chemical id referenced by a formula or a lesson has an encyclopaedia page; every lab carries the required template sections and a safety level; glossary cross-references resolve; filler markers and empty headings fail the build; repeated paragraphs across pages are flagged; unhedged safety language is flagged; and every internal link resolves. The checks are listed in the repository’s README and run in continuous integration. They catch structure, not truth: the chemistry, safety and historical audits that check truth are described in the repository’s contribution guide, and corrections are welcome.

Corrections

!Corrections

If a formula, a hazard statement, a date or an explanation is wrong, open a content-error issue in the repository with the page, what it says, what is correct and the source that shows it. That is the standard the course holds itself to, and the fastest way to improve it.

Open source

The website code is released under the MIT licence and the course content under Creative Commons Attribution-ShareAlike 4.0. Both are in the repository, together with the contribution guide, the authoring guide that every page follows, the security policy and the deployment kit. The site is fully static, loads nothing from third parties, and can be hosted anywhere.

Trademarks and independence

Kodak, Ilford, Foma and the other product and company names that appear in the course are the trademarks of their owners. Their published technical documents are cited because they are among the best sources available; the course is an independent educational work, not affiliated with or endorsed by any of them.