Facer traceability through a board trial means preserving the link from supplier lot and individual roll to the line run, board position, retained sample and review result. A practical record can support root-cause work and repeat trials, but it should not be described as a universal legal or statutory requirement.
The buyer question is: if a trial result changes, can the team identify which facer lot and roll entered each board sample, alongside the process and core information needed to interpret the difference?
Answer first
- Assign a traceable trial reference before the roll reaches the line.
- Record lot, roll, side, line lane and time window at the point of use.
- Carry the same reference onto cut boards and retained specimens.
- Keep corrections visible so the record remains auditable.
Why roll-level identity matters
A supplier lot may contain several rolls, and a board trial may use more than one roll. If the trial record stops at product name or lot number, the team can lose the connection between a local surface or bonding observation and the roll section that produced it.
Roll-level identity is especially useful when a splice, edge condition, storage difference or changeover occurs during the run. It does not prove that the facer caused an outcome. It gives the investigation a reliable starting point.
Build the record around handoff points
| Handoff point | Record to preserve | Typical evidence |
|---|---|---|
| Receiving | Supplier reference, product route, lot, roll and receipt condition | Label readback, receiving record and photographs |
| Storage | Location, packaging status and relevant handling history | Warehouse or trial-staging record |
| Line setup | Roll identity, facer side, lane, start time and board-trial reference | Setup sheet and roll photograph |
| Changeover | End position of one roll and start position of the next | Time, board count or measured line position |
| Board sampling | Board reference, position, cut orientation and linked roll section | Durable sample label and trial map |
| Review | Observation, method, reviewer and disposition | Inspection sheet, photographs and retained sample |
Use a compact identifier
A useful trial identifier should be short enough to copy accurately and specific enough to avoid ambiguity. It may combine the trial date or project reference with a roll code and board sequence. The format belongs to the buyer’s quality system; there is no single universal code.
Keep the supplier’s original lot and roll identity alongside the internal code. Do not replace source identity with a nickname that cannot be traced back to the delivered roll.
Map the roll to the board
The record must survive the physical process. A line sheet can note the roll start and end time, but time alone may be insufficient if boards queue or the line stops. Add the board count, measured position or another stable production reference used by the plant.
At a changeover, mark the last known board from the old roll and the first known board from the new roll. If the transition cannot be identified exactly, record the uncertainty as a range rather than inventing precision.
Keep evidence layers separate
The traceability record identifies which material entered a trial specimen. It does not establish why a surface, bonding or board result occurred. Link it to the relevant process data, core or foam reference, specimen preparation and review method before drawing a conclusion.
The sample-review checklist for board manufacturers helps define what the retained specimens should answer. The guide to requesting TDS, SDS and test reports explains why documents must stay tied to the selected product route and evidence scope.
Minimum lot-and-roll trial record
- Project and board-trial reference.
- Selected facer route and supplier identity.
- Supplier lot and individual roll number.
- Internal identifier, if used.
- Fitting side, line lane, start and end reference.
- Splice or roll-change position.
- Linked board samples and retained facer samples.
- Reviewer, observation date and next disposition.
Protect the record during review
Photographs should include the sample identifier in the same frame without exposing confidential customer information. If an entry is corrected, retain the original value, the correction, the date and the responsible person. A clean overwrite can remove the history needed later.
When technical documents are attached to the trial file, record their file name, version date and product-route scope. The broader document comparison guide in the GRECHO Insights library shows how to avoid extending one report beyond its sample or method boundary. Public and request-gated resources can be planned through the Resource Center.
FAQ
Is roll-level traceability required by law for every board trial?
This article does not establish a universal legal requirement. The buyer should follow applicable contracts, regulations and its own quality system.
Can a lot number alone be enough?
Sometimes, but roll-level identity gives better resolution when several rolls from one lot enter the same trial or when a local issue is being investigated.
What if a changeover position is uncertain?
Record the affected range and the reason for uncertainty. Do not assign an exact board to a roll without evidence.
Next step
To align a lot-and-roll record with a selected facer route and board trial, contact GRECHO with the roll format, trial sequence, retained-sample plan and document needs.
