Conservation and material studies

Nothing has been done to this sheet, and that is the record

No paper conservator has examined it. No technical imaging has been carried out. No treatment has been proposed, sought or performed. Everything below is either a statement of that absence, a plan with its risks attached, or a condition note transcribed from a sale catalogue by someone who was describing a lot rather than documenting an object.

Condition as recorded

Five observations. Four come from an auction cataloguer, at second hand. The fifth records what nobody has looked at.

Trimming

Left margin

significant

The sheet is described as roughly trimmed at the left margin. Trimming is irreversible and removes evidence: margins can carry plate marks, inscriptions, dealer codes and collector marks, and their loss narrows what can later be established about the sheet's history.

PossibleObserved by Auction cataloguer (via the working record) — Not a conservator's observationTrimmed

Dampstaining

Lower left

moderate · affects the image

Staining consistent with historic water exposure at the lower left, reported as extending partly into the printed image. Extent, tideline definition and whether the staining is active or stable have not been assessed.

PossibleObserved by Auction cataloguer (via the working record) — Not a conservator's observationDampstain

Cockling / wrinkling

Lower left

moderate · affects the image

Planar distortion of the sheet in the same area as the staining, which is what one would expect if the two share a cause. Whether the distortion is stable at current relative humidity is unknown.

PossibleObserved by Auction cataloguer (via the working record) — Not a conservator's observationCockling

Housing

Whole sheet

minor

Unmounted at purchase. An unmounted sheet is easier to examine and to image, and carries no risk from an old adhesive or an acidic backing board — but it is also less protected in handling and storage, and appropriate archival housing is the first thing a conservator will address.

ProbableObserved by Owner — Owner's observation, not a conservator'sMount

Not yet assessed

Whole sheet

minor

No assessment exists of foxing, tears, losses, abrasion, thinning, skinning, surface dirt, discolouration, media stability, or the pH of the support. Their absence from this list means nobody has looked, not that they are absent.

UnknownNo observer

The imaging sequence, and what each step costs the object

Ordered by handling risk, not by how much a researcher wants the result. Each step waits on the one before it.

Method	What it would answer	Handling cost	Status
Colour-managed recto photography	Whether the signature is present; the state features; the extent of the staining; a scale-referenced record of the whole sheet.	Low. The sheet is placed, photographed and returned.	Planned first
Verso photography	Collector marks, dealer codes, inscriptions, mounting traces — the most likely route into ownership before 2023.	Moderate. The sheet must be turned, which is the single riskiest routine movement.	Planned, same session
Raking light	Surface texture: cockling, creases, the plate mark, the relief of heavily inked passages.	Low. A lighting change, not a handling change.	Planned, same session
Transmitted light	Chain lines, laid lines and any watermark fragment — the strongest single line of evidence on when the sheet was printed.	Moderate to high depending on method. The sheet must be supported over a light source. Only by a method a paper conservator approves in writing.	Subject to conservator approval
Ultraviolet examination	The true extent of the staining, previous repairs, retouching, and any earlier treatment not visible in normal light.	Low, but exposure must be brief; UV is itself a light dose.	Subject to conservator advice
Magnification and microscopy	Whether drypoint burr survives; the character of the printed line; whether any line has been reworked by a later hand.	Low.	Subject to specialist availability

Every published derivative will have its EXIF and GPS metadata stripped before publication — checked as part of the workflow rather than trusted to a camera setting — and the archival masters will be hashed and held privately.

Treatment

The standing position, and every option that has been considered.

Stain reduction at the lower left

not proposed

Case forThe dampstaining is the most visually conspicuous feature of the sheet and extends into the printed image. Reducing it would make the impression more attractive.

RisksAqueous or bleaching treatments to reduce staining carry risks to the sizing, surface and long-term stability of a seventeenth- or eighteenth-century sheet, and can alter the paper tone unevenly. The staining is also historical evidence: it records something that happened to this sheet, and removing it removes that record.

PositionNot proposed and not sought. Improving appearance is not a reason this project will commission a treatment. If a conservator later advises that the staining is active and threatens the stability of the support, that is a different question and would be assessed on its own terms and documented here.

Flattening of the cockled area

not proposed

Case forPlanar distortion makes the sheet harder to photograph evenly and harder to mount.

RisksHumidification and flattening are routine but not risk-free, and are unnecessary if the distortion is stable.

PositionNot proposed. The question of whether the distortion is stable has not been asked yet, because no conservator has seen the sheet.

Archival housing

proposed

Case forThe sheet is unmounted and in interim storage. Appropriate archival housing is preventive conservation rather than treatment: it does not alter the object, and it reduces handling risk in every subsequent step, including imaging.

RisksMinimal, provided materials are conservation-grade and the sheet is not hinged or adhered. No adhesive should touch the sheet.

Cumulative light exposure ledger

Light damage to paper is cumulative and irreversible, so the only honest way to answer a borrowing curator's question is to have been counting.

Period	Context	Illuminance	Hours	Lux hours
2023–present	Private custody, not displayed	0 lux	0	0
Total under this stewardship				0

The sheet has not been exhibited, framed for display, or kept in ambient light since acquisition. Its recorded cumulative exposure under this project's stewardship is nil. Exposure before 2023 is unknown and unrecoverable; the visible condition suggests it was not always so well protected.

Display limit: 50 lux, with ultraviolet below 75 µW/lm — the Canadian Conservation Institute's benchmark for works on paper.
Annual limit: 50,000 lux hours a year for very light-sensitive material, followed by 3 years' rest.
Single display: No more than 13 weeks in one exhibition, consistent with published practice for the most fugitive categories.
Environment: 40–60% RH, 16–25 °C, with no more than ±10% RH in 24 hours.

These figures are taken from published conservation guidance rather than set by this project, so that a borrowing institution is reading numbers it already recognises. Sources are given on the study and loan page.

Paper fingerprint

The standard template this project will record the paper against, published empty so it is clear exactly what is not yet known.

Support type: Recorded as laid paper. Not observed.
Chain-line spacing: Not measured
Laid-line density: Not measured
Watermark: Not examined
Countermark: Not examined
Sheet thickness: Not measured
Colour / tone: Not recorded under controlled light
Fibre analysis: Not carried out — requires sampling; not proposed

Published in this form on purpose. A comparable template filled in for another impression can be laid alongside this one field by field, which is the whole value of recording paper in a standard way rather than in prose.

The questions this bears on

Terms used on this page

Laid paper: Paper made on a mould of closely spaced wires supported by widely spaced ones, leaving a visible grid when held to the light: fine laid lines and widely spaced chain lines. Standard for European paper of the seventeenth century.
Chain lines: The widely spaced lines in laid paper left by the mould's supporting wires. Their spacing is a property of the individual mould, so it can distinguish batches of paper that otherwise look identical — and unlike a watermark, chain lines run across the whole sheet, so trimming rarely removes them.
Watermark: A design worked in wire into the papermaking mould, visible as a thinner, brighter area when the sheet is held to the light. Because papermakers' moulds were in use for limited periods, an identified watermark can narrow the years in which a sheet of paper — and therefore an impression printed on it — was made.
Countermark: A smaller secondary mark, often initials, placed in the other half of the sheet from the main watermark. It can identify a particular mill or maker where the main mark is generic.
Mount: The board assembly a work on paper is housed in. A conservation-grade mount protects the sheet in handling and storage; an acidic one damages it over decades. An unmounted sheet is easier to examine and to photograph but less protected.
Transmitted light: Photography with the light source behind the sheet rather than in front of it, so the paper's own structure — laid lines, chain lines, watermarks, thinning, repairs — becomes visible. It is the standard way to record a watermark, and it requires a conservator's judgement about handling.
Raking light: Light directed across the surface at a low angle, which reveals surface texture: cockling, creases, the impression of the plate mark, embossing, and the relief of heavily inked passages.
Lux hour: The unit of cumulative light exposure: illuminance in lux multiplied by hours of exposure. Light damage to paper and to media is cumulative and irreversible, so a lender who tracks lux hours can say what a sheet has already spent rather than guessing.
Facility report: The standard document by which a borrowing institution describes its building, environment, security and staffing to a lender. In the United States the American Alliance of Museums' General Facility Report is the common form, and most lenders will not begin a serious conversation without one.
Condition report: A dated, itemised record of an object's physical condition at a point in time, written by a conservator. It is what makes it possible to tell later whether anything has changed — which is why one is made before an object travels and again when it arrives.

Imaging plan for NP-RMB-001 and its current status is on the viewer page.