Pigments
1. Pigment name
ID and name: OP1 material_pigment_name
Provided by: data provider
Obligation: mandatory
Occurrences: 1–n
Definition: Name(s) of the pigment.
Allowed values and other constraints: controlled vocabulary
2. Pigment form
ID and name: OP2 material_pigment_archaeological_context
Provided by: data provider
Obligation: mandatory
Occurrences: 1
Definition: In which shape/form was the pigment found in the archaeological context?
Allowed values and other constraints: free text
Example: pellets; as part of a fresco
3. Pigment type
ID and name: OP3 material_pigment_type
Provided by: data provider
Obligation: mandatory
Occurrences: 1–n
Definition: Information about the pigment type.
with the two subproperties:
3.1 Type
ID and name: OP3.1 material_pigment_type_chemistry
Provided by: data provider
Obligation: mandatory
Occurrences: 1
Definition: Is it an organic or inorganic pigment?
Allowed values and other constraints: controlled vocabulary
3.2 Occurrence
ID and name: OP3.2 material_pigment_type_production
Provided by: data provider
Obligation: recommended
Occurrences: 0–1
Definition: Is it a natural or synthetic pigment?
Allowed values and other constraints: controlled vocabulary
4. Pigment composition
ID and name: OP4 material_pigment_composition
Provided by: data provider
Obligation: mandatory
Occurrences: 1
Definition: The chemical and/or mineralogical composition of the pigment. At least one of its subproperties must be provided.
with the three subproperties:
4.1 Chemical composition
ID and name: OP4.1 material_pigment_composition_chemistry
Provided by: data provider
Obligation: recommended
Occurrences: 0–n
Definition: If it is an inorganic pigment, the chemical composition of the pigment.
with the eight subproperties:
4.1.1 Analytical method
ID and name: B4.1 chemistry_method
Provided by: data provider
Obligation: mandatory
Occurrences: 1
Definition: The method used to determine the chemical composition.
Allowed values and other constraints: controlled vocabulary
4.1.2 Analysed compound
ID and name: B4.2 chemistry_compound
Provided by: data provider
Obligation: mandatory
Occurrences: 1–n
Definition: The analysed chemical compound (chemical element or oxide).
Allowed values and other constraints: controlled vocabulary, not available if a mass spectrometric-method is recorded in B4.1 Analytical method.
4.1.3 Analysed isotope
ID and name: B4.3 chemistry_icp_isotope
Provided by: data provider
Obligation: mandatory
Occurrences: 1–n
Definition: The isotope used for quantification of a chemical element.
Allowed values and other constraints: controlled vocabulary, only available if a mass spectrometric-method is recorded in B4.1 Analytical method.
4.1.4 Value
ID and name: B4.4 chemistry_value
Provided by: data provider
Obligation: mandatory
Occurrences: 1–n
Definition: The concentration of the analysed chemical compound.
Allowed values and other constraints: decimal number
Example: 15.3
4.1.5 Unit
ID and name: B4.5 chemistry_unit
Provided by: data provider
Obligation: mandatory
Occurrences: 1–n
Definition: The unit in which the concentration of the analysed chemical compound is given.
Allowed values and other constraints: controlled vocabulary
4.1.6 Uncertainty type
ID and name: B4.6 chemistry_uncertainty_type
Provided by: data provider
Obligation: recommended
Occurrences: 0–n
Definition: The type of analytical uncertainty.
Allowed values and other constraints: controlled vocabulary
4.1.7 Confidence level
ID and name: B4.7 chemistry_uncertainty_sigma
Provided by: data provider
Obligation: recommended
Occurrences: 0–n
Definition: Sigma value of the reported absolute analytical uncertainty.
Allowed values and other constraints: 1, 2, 3
Example: 2
4.1.8 Uncertainty value
ID and name: B4.8 chemistry_uncertainty_value
Provided by: data provider
Obligation: recommended
Occurrences: 0–n
Definition: Value of the absolute analytical uncertainty.
Allowed values and other constraints: decimal number
Example: 0.3
4.2 Organic compounds
ID and name: OP4.2 material_pigment_composition_compound
Provided by: data provider
Obligation: recommended
Occurrences: 0–n
Definition: The (main) organic compounds in the pigment.
Allowed values and other constraints: controlled vocabulary
4.3 Mineralogical composition
ID and name: OP4.3 material_pigment_composition_mineralogy
Provided by: data provider
Obligation: recommended
Occurrences: 0–n
Definition: If it is mineral pigment, which minerals are present?
Allowed values and other constraints: controlled vocabulary (IMA list of minerals)
5. Pigment production
ID and name: OP5 material_pigment_processing
Provided by: data provider
Obligation: mandatory
Occurrences: 1
Definition: Information about the production context and processing steps of the pigment.
with the two subproperties:
5.1 Production context
ID and name: OP5.1 material_pigment_production_context
Provided by: data provider
Obligation: mandatory
Occurrences: 1
Definition: The production context the object is related to.
Allowed values and other constraints: controlled vocabulary
5.2 Treatment
ID and name: OP5.2 material_pigment_production_treatment
Provided by: data provider
Obligation: recommended
Occurrences: 0–n
Definition: Which treatments were done to the raw material(s) to produce the pigment?
Allowed values and other constraints: controlled vocabulary
6. Colour
ID and name: OP6 material_pigment_colour
Provided by: data provider
Obligation: recommended
Occurrences: 0–1
Definition: The colour of the pigment.
with the two subproperties:
6.1 Name
ID and name: OP6.1 material_pigment_colour_name
Provided by: data provider
Obligation: mandatory
Occurrences: 1
Definition: General colour of the pigment.
Allowed values and other constraints: free text
Example: blue; 5P 5/10; L56 a26 b*3
6.2 Colour system
ID and name: OP6.2 material_pigment_colour_system
Provided by: data provider
Obligation: recommended
Occurrences: 0–1
Definition: The colour system used to determine the colour.
Allowed values and other constraints: controlled vocabulary
7. Pigment alteration
ID and name: OP7 material_pigment_alteration
Provided by: data provider
Obligation: recommended
Occurrences: 0–1
Definition: Information about the alteration of the pigment.
with the two subproperties:
7.1 Alteration type
ID and name: OP7.1 material_pigment_alteration_type
Provided by: data provider
Obligation: recommended
Occurrences: 0–n
Definition: The type of the observed alteration process.
Allowed values and other constraints: controlled vocabulary
7.2 Details
ID and name: OP7.2 material_pigment_alteration_description
Provided by: data provider
Obligation: recommended
Occurrences: 0–n
Definition: Additional information about the observed alteration or its productions.
Allowed values and other constraints: free text
Example: t.b.d.
8. Pigment recycling
ID and name: OP8 material_pigment_recycling
Provided by: data provider
Obligation: mandatory
Occurrences: 1
Definition: Information about whether the pigment was recycled or reused.
with the two subproperties:
8.1 Indicators
ID and name: OP8.1 material_pigment_recycling_indicator
Provided by: data provider
Obligation: mandatory
Occurrences: 1
Definition: Does the pigment show indicators for recycling or reuse?
Allowed values and other constraints: controlled vocabulary
8.2 Reasoning
ID and name: OP8.2 material_pigment_recycling_reason
Provided by: data provider
Obligation: recommended
Occurrences: 0–1
Definition: Observed indicators for recycling or reuse.
Allowed values and other constraints: free text
Example: presence of Sn in trace element analysis
9. Lead source
ID and name: OP9 material_pigment_lead_source
Provided by: data provider
Obligation: recommended
Occurrences: 0–1
Definition: The source of lead in the pigment
Allowed values and other constraints: controlled vocabulary
10. Provenance indicators
ID and name: OP10 material_pigment_raw_material_provenance
Provided by: data provider
Obligation: recommended
Occurrences: 0–1
Definition: Information about provenance, if known from other sources.
Allowed values and other constraints: free text
Example: t.b.d.
11. Sr isotopes
ID and name: OP11 material_pigment_isotopes_Sr
Provided by: data provider
Obligation: optional
Occurrences: 0–n
Definition: The 87Sr/86Sr ratio of the pigment.
with the two subproperties:
11.1 Value
ID and name: OP11.1 material_pigment_isotopes_Sr_value
Provided by: data provider
Obligation: optional
Occurrences: 0–1
Definition: Value of the 87Sr/86Sr ratio.
Allowed values and other constraints: decimal number
Example: 0.7856
11.2 Analytical precision
ID and name: OP11.2 material_pigment_isotopes_Sr_2SD
Provided by: data provider
Obligation: optional
Occurrences: 0–1
Definition: Absolute analytical uncertainty of the 87Sr/86Sr ratio in double standard deviation (2SD).
Allowed values and other constraints: decimal number
Example: 0.0002
12. Nd isotopes
ID and name: OP12 material_pigment_isotopes_Nd
Provided by: data provider
Obligation: optional
Occurrences: 0–n
Definition: The εNd value of the pigment.
with the two subproperties:
12.1 Value
ID and name: OP12.1 material_pigment_isotopes_Nd_value
Provided by: data provider
Obligation: optional
Occurrences: 0–1
Definition: Value of εNd.
Allowed values and other constraints: decimal number
Example: t.b.d.
12.2 Analytical precision
ID and name: OP12.2 material_pigment_isotopes_Nd_2SD
Provided by: data provider
Obligation: recommended
Occurrences: 0–1
Definition: Absolute analytical uncertainty of the εNd value in double standard deviation (2SD).
Allowed values and other constraints: decimal number
Example: t.b.d.
13. Hf isotopes
ID and name: OP13 material_pigment_isotopes_Hf
Provided by: data provider
Obligation: optional
Occurrences: 0–n
Definition: The εHf value of the pigment.
with the two subproperties:
13.1 Value
ID and name: OP13.1 material_pigment_isotopes_Hf_value
Provided by: data provider
Obligation: optional
Occurrences: 0–1
Definition: Value of εHf.
Allowed values and other constraints: decimal number
Example: t.b.d.
13.2 Analytical precision
ID and name: OP13.2 material_pigment_isotopes_Hf_2SD
Provided by: data provider
Obligation: recommended
Occurrences: 0–1
Definition: Absolute analytical uncertainty of the εHf value in double standard deviation (2SD).
Allowed values and other constraints: decimal number
Example: t.b.d.