mummy brown
Enable an agent to identify mummy brown, assess the evidence for its material origin and condition, and determine appropriate examination, conservation or substitution.
Bundle → Layer → Finding → Questions Filled
6 bundles · 11 layers · 14 findings · 25 questions
Identity and namesakes Establish what the name mummy brown denotes in the record being evaluated.
Historical material
Define the historical pigment while retaining uncertainty about individual specimens.
Remains-associated pigment
Historical mummy brown was prepared using mummified remains; that history does not authenticate every labelled specimen. [Winsor & Newton](https://www.winsornewton.com/blogs/articles/mummy-brown).
- Does this record denote historical pigment, a modern namesake or merely a brown colour? definition
- What evidence connects this particular specimen to processed mummified remains? provenance
Name boundaries
Resolve labels against context and formulation.
Label is not composition
Record the original name separately from the attributed material; neither a modern mummy brown label nor a historical apparent synonym establishes composition.
- Which manufacturer, date and formulation support the interpretation of this mummy brown label? provenance
- If mummia or caput mortuum appears in the record, what establishes that it denotes this pigment rather than a neighbouring material? boundary
Composition and attribution Describe what the examined material contains and what that evidence can establish.
Constituents and carriers
Separate pigment constituents from binders, additions and contamination.
Specimen-specific mixture
Record measured constituents and their attribution to colourant, carrier or later addition; do not turn one specimen's composition into a universal mummy brown recipe.
- Which organic and inorganic constituents were detected, by which methods and with what uncertainty? measurement
- Which detected materials belong to the pigment rather than its binder, support or conservation history? boundary
Identification strength
Assess competing explanations for analytical and documentary evidence.
Convergent identification
Keep observation separate from inference and evaluate alternative brown pigments or additions before assigning historical mummy origin.
- Could the observed composition be explained by bitumen, earth pigments, binder or contamination without mummy-derived material? boundary
- What independent evidence supports the attribution, and which observations contradict it? provenance
Colour and paint behaviour Characterize the appearance and working behaviour of a particular mummy brown preparation.
Optical response
Describe brown colour and transparency under controlled conditions.
Conditional transparency
Historical accounts associate mummy brown with transparent glazing; actual optical behaviour must be measured for the preparation examined. [Winsor & Newton](https://www.winsornewton.com/blogs/articles/mummy-brown).
- What colour and transparency are measured at a stated film thickness, binder, substrate and illumination? measurement
- Does a proposed modern substitute match the intended glaze appearance under the same conditions? action
Dispersion and film formation
Connect preparation to observed handling and film behaviour.
Preparation-dependent performance
Attach dispersion and drying observations to a documented preparation instead of assuming every mummy brown specimen behaves alike.
- What particle distribution, aggregation and settling occur in the recorded carrier? measurement
- Under what binder, pigment loading and environmental conditions were drying or persistent tackiness observed? measurement
Condition and conservation Evaluate changes in mummy brown specimens and their implications for examination or treatment.
Change and causation
Distinguish observed deterioration from assumptions about pigment instability.
Documented condition change
Record changes against dated observations and consider the binder, neighbouring layers and previous treatments before assigning causation.
- What evidence documents discoloration, cracking, migration or tackiness over time? measurement
- What supports attributing the change to the mummy brown constituent rather than the surrounding paint system? boundary
Treatment compatibility
Determine whether proposed interventions are compatible with the examined material.
Limited intervention evidence
Base treatment choices on authorized, localized evidence; record what substitute test materials do and do not reproduce.
- What evidence establishes sensitivity to the proposed solvent, moisture, heat or mechanical intervention? measurement
- Can a representative substitute answer the treatment question, or is an authorized original-material test necessary? action
Provenance and stewardship Connect material attribution to custody, research limits and decisions involving possible remains.
Custody and origin
Trace the specimen's documented history without substituting a general origin story.
Traceable origin claims
Separate verified custody events from supplier assertions and later retellings about human, animal or geographical origin.
- Which dated records link this specimen to its supplier, acquisition and subsequent custody? provenance
- Which claims of human, animal or Egyptian origin are documented, inferred or unverified? provenance
Permitted material actions
Record the specimen-specific basis for examination, sampling and use.
Remains-sensitive decisions
Record custodial decisions and applicable review requirements explicitly; neither a pigment label nor analytical access establishes permission for destructive use.
- Who can authorize examination or sampling, and what limits apply given the evidence of possible human remains? action
- Can the intended educational, artistic or comparative purpose be met with a documented modern substitute? action
- What specimen-specific composition and hazard information must be resolved before handling or treatment? action
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Check these first
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these check these first hold for the sense of mummy brown this model covers, and on what evidence? provenance
Real-world use
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these real-world use hold for the sense of mummy brown this model covers, and on what evidence? provenance
Failure modes and hazards
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these failure modes and hazards hold for the sense of mummy brown this model covers, and on what evidence? provenance
Neighbouring kinds and how to tell them apart
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of mummy brown this model covers, and on what evidence? provenance
Classifiers Filled
- Family
- Thing Registry
- Category
- Physical world and living systems
- Entry kind
- thing
- Plane
- PHY
- Domain
- PHY.MAT
What it is Filled
Mummy brown is a historical brown artists' pigment made from ground mummified remains, especially Egyptian human or animal mummies, whose composition varied with the remains and embalming materials used.
In scope
- Historical mummy brown as a pigment associated with processed mummified remains
- Modern formulations bearing the mummy brown name, explicitly distinguished by composition
- Evidence connecting a pigment specimen or paint constituent to the historical material
- Specimen-specific composition, optical properties and physical condition
- Constraints arising from possible human remains and limited research material
Out of scope
- Mummies as archaeological or funerary objects
- Medicinal mummia and its therapeutic claims
- Complete commercial paint products and their packaging specifications
- Whole paintings, their authorship and overall conservation plans
- Brown as an abstract colour or digital colour code
- Manufacturing instructions for processing human or animal remains
Why it exists Filled
Enable an agent to identify mummy brown, assess the evidence for its material origin and condition, and determine appropriate examination, conservation or substitution.
Distinguishing features Filled
- Require evidence of material origin to distinguish historical remains-derived pigment from a modern namesake; the label alone cannot establish equivalence. Historical and modern materials are distinguished in [Winsor & Newton's account](https://www.winsornewton.com/blogs/articles/mummy-brown).
- Distinguish mummy brown from an ordinary brown pigment through documented provenance and composition together, rather than visual colour matching.
- Treat a finding of bituminous material as evidence about a constituent, not sufficient proof of mummy origin.
- Distinguish pigment identity from its carrier: a brown oil-paint sample requires attribution of its colourant separately from its binder.
- Require contextual evidence before treating historical names such as mummia or caput mortuum as synonyms for this registry entry.
What robots and AI may and may not do Filled
Must not
- Assist in obtaining human remains or mummies to make pigment.
- Treat human remains in collections as mere material.
- Claim an artwork contains human remains without analytical evidence.
- Sell or trade remaining historical material as a curiosity without regard to its origin.
Only with a human decision
- Any decision on the treatment, study or disposal of historical material that may contain human remains.
May
- Describe the history of the pigment and its origin in human and animal remains, citing sources.
- Identify historical paint tubes or artworks said to contain it, stating when identity is unconfirmed.
- Note when a modern product sold under the name contains no remains.
Moral aspects Filled
- The pigment was made by grinding the dead, often taken from Egypt without consent.
- Descendant and source communities deserve respect in how such material is handled and discussed.
Who is affected
- Source communities in Egypt
- Museums and conservators
- Artists and collectors
Owners Filled
Steward
The holding museum or collector; heritage and human-remains authorities set rules for such material.
Links to other meta-models Filled
parent
- Q161179 - registry parent class
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.mummy-brown
- Wikidata: Q15981955 (https://www.wikidata.org/wiki/Q15981955)
Direct properties required Filled
- Material attribution: historical remains-derived; modern namesake; historical attribution unresolved; unidentified brown material
- Attribution confidence: label-only; documentary support; analytical support; convergent evidence; disputed
- Source-material attribution: human remains indicated; animal remains indicated; remains of unresolved origin; documented non-remains formulation; unknown
- Constituent profile: identified constituents; mass fraction in % where quantified; method, detection limit and uncertainty
- Material context: loose pigment; bound paint; paint-layer sample; reference preparation; unknown
- Colour and transparency: CIELAB coordinates; spectral reflectance or transmittance in %; film thickness in µm; stated binder and measurement conditions
- Particle-size distribution: µm; distribution, preparation method and distinction between particles and aggregates
- Paint-film condition: observed tackiness, cracking, discoloration, separation or no observed change; dated examination
- Specimen provenance: links to specimen, supplier, dated records, custody events and analytical reports
- Examination authorization: non-invasive examination permitted; sampling permitted with limits; restricted; pending review
Recognition required Filled
- Warm brown paint or powder, indistinguishable by eye from other brown pigments.
- Historical tube labels may name it; only analysis can confirm organic remains.
Capabilities and actions required Filled
- Classify a specimen as historical material, modern namesake or unresolved attribution with supporting evidence.
- Compare documentary provenance with analytical observations and flag contradictions.
- Plan authorized examination that preserves scarce reference material.
- Evaluate colour and transparency against a documented modern substitute.
- Assess treatment compatibility using specimen-specific observations and representative test materials.
- Route possible human-remains material for appropriate custodial review before destructive work.
Hazards and failure modes required Filled
- Variable composition makes colour and permanence unpredictable.
- Possible residues from embalming materials in historical stocks.
- Ethical harm from trading or displaying human remains.
Standards and interfaces required Filled
- The ICOM Code of Ethics for Museums, issued by the International Council of Museums, provides standards for museum care, research and display of sensitive material where the pigment contains human remains.
Context of use required Filled
- Mummy brown is encountered in historical artists' materials, paintings and museum collections associated with the use of mummified remains as pigment.
- Conservators and researchers examine suspected examples to investigate composition, provenance and deterioration.
- Its historical name alone does not establish the presence of human or animal remains because formulations and later substitutes varied.
Sources Filled
- Wikidata item Q15981955: mummy brown - identity and sense of the item
- Wikipedia: Mummy brown - general description of the item
Open questions
- Which authenticated reference specimens and analytical methods can distinguish remains-derived mummy brown from bituminous or earth-pigment substitutes, and with what confidence?
- How did formulations vary between suppliers and periods, and which historical names reliably denote this material in each context?
- Which reported ageing and drying problems are attributable to the pigment rather than binders, additives or treatment history?
- Which identifiers, safety records and measured physical properties apply to specific modern formulations or historical specimens without implying a universal chemical identity?
- For a given specimen, what evidence and custodial consultation are needed to settle human-remains status and permissible sampling, retention or transfer?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q15981955/spec.json