Paper surface strength testing helps buyers assess whether the printable face of a jewelry box wrap can resist material being pulled away during printing. An IGT pick test can inform material selection, but it does not approve the whole box or guarantee every printing process. Combine a traceable lab report with a representative printed and finished sample.
What surface strength means for a jewelry box
A rigid jewelry box can feel sturdy while its decorative paper wrap remains vulnerable to surface damage. The board core provides the box structure; the exposed paper face carries the color, logo, and finish the customer sees. Those components should be evaluated separately.
Picking is the removal of material from a paper or board surface under a pulling action, potentially leaving visible imperfections in print. For a buyer, the concern is not simply whether a sheet looks attractive before printing, but whether the actual printable face remains intact through the proposed production process.
Face means the specific side of the sheet being evaluated. Lot identifies the batch of material represented by a sample. Finish describes the relevant surface treatment or the planned finished appearance. Condition records how the sample was prepared and held for the test, as documented by the lab. The reported endpoint is the particular result or observation the method reports; it should be named rather than described simply as a pass.
These definitions matter because a blank wrap swatch, a sheet printed on the opposite side, and a finished box do not answer the same approval question. For Custom Printed Jewelry Boxes, specify the face that will actually receive the artwork and the finish that customers will handle.
What an IGT pick result can—and cannot—tell you
ISO 3783:2006 describes an accelerated-speed method using an IGT-type tester to assess pick velocity and pick resistance for coated and uncoated paper and board. Its scope also covers liner delamination resistance on paperboard. The standard simulates aspects of printing behavior and is particularly relevant to conditions involving tacky inks. ISO 3783:2006 scope, EVS
IGT Testing Systems describes its pick test as a measure of resistance to picking and identifies pick distance, velocity, and resistance among the reported outputs. Ask the lab which endpoint appears in your report and how it relates to the method and material submitted. IGT Testing Systems: Surface characteristics
A result is evidence about the submitted specimens under the reported test conditions. It is not a universal acceptance limit or a promise that a material will perform in every offset, flexographic, UV, digital, or foil process. Test oil and the production ink are different inputs; a lab result and an actual production print therefore answer related but distinct questions.
An under-development replacement for a standard should not be treated as a published acceptance standard. Identify the edition actually used and ask the qualified lab to explain its applicability. Let the lab set the method details; the buyer’s role is to define the material, application, and decision that the evidence must support.
Separate the defects before choosing evidence
A complaint that a box is “shedding” is too broad to guide a useful test request. Describe what came away, where it appeared, and when it was first noticed. The following distinctions help direct the investigation:
- Substrate picking: material is pulled from the paper surface. Ask whether the affected face and the relevant print conditions are represented in the evaluation.
- Coating lift: the visible coating appears to separate from the surface. Record the affected area and ask the lab or production team to identify the failure, rather than assuming every missing patch is the same defect.
- Layer delamination: layers separate from each other. A sound-looking outer face does not by itself establish that the underlying layers are secure.
- Dust or lint: loose particles appear on the material or in the print. Document their location and investigate material handling and production as well as the substrate.
- Finished-print rubbing: the visible print or finish marks, transfers, or changes during handling. Evaluate the completed surface for the intended handling scenario; a substrate pick result alone does not resolve this question.
For example, imagine a dark lid showing isolated pale specks after printing. An IGT result may help assess the submitted paper, but the standard’s scope notes that its limited test area and general character will not usually detect local imperfections such as surface debris. Keep the affected sheets and images, and investigate where the specks appeared in the process rather than closing the issue on a lab score alone. ISO 3783:2006 scope, EVS
Compare evidence according to the buying decision
Use a lab test to compare defined material samples
A lab comparison is useful when choosing between candidate wraps or investigating a suspected surface weakness. Submit identifiable samples from the relevant face and ask for the same documented method and comparable conditioning. Keep the reported endpoints and observations with each material identity.
Suppose a buyer is comparing two papers for a printed lid. One sample is the intended coated face; the other arrives without a face identified. Even if both have results, the comparison is incomplete until the buyer knows which side was tested and whether it represents the proposed production material.
Avoid converting a wax pick grade into an IGT value. IGT describes wax pick as a separate method with a critical wax strength endpoint, while its IGT pick test reports different outputs. A report using one method should remain labeled as that method, with its own endpoint and conditions. IGT Testing Systems: Surface characteristics
Use a representative print to evaluate the design
A print proof should show the artwork, substrate face, coverage, and proposed finish closely enough to support the decision being made. Ask what the proof represents and what it leaves unresolved. A visual proof can establish whether a design direction is acceptable; it may not demonstrate how the approved material behaves in the actual production process.
Consider a hypothetical white proof with a small logo for a box intended to have a solid dark lid. The proof may be useful for logo placement, yet it leaves the large printed field insufficiently represented. Request a sample that includes that field before approving its appearance.
A blank wrap sample has a different purpose again: it helps the buyer inspect the unprinted surface and feel, but it cannot establish the appearance of the actual printed side. Keep both samples if both decisions matter, and label each by its intended use.
Use a finished sample for handling and assembly
A finished box lets the buyer review the printed surface in context: the visible lid, wrapped edges, corners, closure, and areas touched during opening. If rubbing or transfer is a concern, agree on a suitable evaluation of the completed print and finish with the production team or a qualified lab.
Do not assume that a strong board core cures a weak wrap surface. In a hypothetical approval, the box may hold its shape well while the decorative paper shows localized damage around a printed logo. Record these as separate findings and resolve the surface issue before accepting the visual standard.
A numbered approval workflow
- Define the application. Identify the box component, artwork coverage, intended print process, proposed finish, and the surfaces the customer will see or touch. Note whether the priority is comparing materials, approving appearance, investigating a defect, or all three.
- Identify the material. Record the paper or board description, supplier’s material reference, lot where available, printable face, coating or surface finish, and the relationship between the wrap and the box core. Ask how the submitted sample corresponds to the proposed order.
- Agree on the evidence. Discuss whether a laboratory pick test, a representative production print, a finished sample, or additional defect investigation is appropriate. Ask a qualified lab to select and document the relevant test details; do not insert an arbitrary threshold, ink tack, or speed into the purchase specification.
- Review the report in context. Check the method and edition, specimens, face, conditioning, endpoint, observations, and any limits on interpretation. Compare like with like. If a report lacks the sample identity or the relevant face, request clarification before using it to approve the material.
- Inspect representative output. Review the actual printed side, including the most visually demanding artwork and the proposed finish. Examine a finished box where assembly and handling matter. Record the lighting and viewing approach agreed for the visual decision, and retain clear defect images where concerns arise.
- Set the approval record. Identify the accepted material and finish, the sample used as the visual reference, the evidence reviewed, and any open items. State who must approve a material, process, or finish substitution and how a replacement sample will be assessed.
- Resolve exceptions before release. If defects appear, preserve affected and unaffected examples, identify their location, and ask the relevant parties to investigate. Decide whether the evidence supports acceptance, a revised sample, further testing, or a change in material or process. Document the decision rather than relying on an informal verbal pass.
Buyer guide: what to request and how to decide
RFQ inputs and questions
A useful request for quotation connects the desired appearance to the evidence needed for approval. Provide the artwork or a clear description of the printed areas, the intended box component, the proposed surface and finish, and the handling concerns that matter to your brand.
Ask prospective partners:
- Which paper face and finish are represented by the proposed sample, and can the material and lot be identified?
- What will the visual proof show, and which production or finishing steps will it not represent?
- Can a qualified lab report be supplied or arranged for the specified material if a pick comparison is needed?
- How will the report identify the method, edition, sample condition, endpoint, and observations?
- How will the production team investigate isolated specks, missing areas, or apparent layer separation if they occur?
- What reference sample and change-approval process will be used if the paper or finish changes?
Decision criteria and red flags
Favor evidence that is traceable to the proposed material and relevant to the specific concern. A useful approval package links the lab specimens, printed sample, finished example, and agreed reference to the same identified application. Where they differ, the differences should be visible in the record.
Treat the following as reasons to pause and clarify:
- A report identifies neither the tested face nor the material represented.
- A single score is presented as proof that the box will perform in every print and finishing process.
- A wax grade is presented as interchangeable with an IGT result.
- A blank swatch is offered as approval for an unrepresented printed face or large color field.
- A sturdy core is used to dismiss damage on the decorative surface.
- Defect images are missing, or isolated specks are dismissed without investigating where they arose.
- A proposed material or finish substitution has no route for renewed review.
Compact approval checklist
Before releasing an order, check that you have:
- The box component, artwork coverage, intended print process, and finish.
- The material reference, lot where available, and actual printable face.
- A report naming its method, edition, sample condition, and endpoint, if testing was requested.
- A representative print and, where needed, a finished box for review.
- Defect images and an investigation plan for unresolved marks or particles.
- An agreed reference sample, decision owner, and change-approval route.
Frequently asked questions
Does a strong jewelry box need a paper surface strength test?
Structural strength and surface behavior are separate concerns. Consider a pick test when comparing wraps or investigating suspected surface loss, especially where the proposed printing conditions make that concern relevant. The need depends on the design, process, and evidence already available.
Can an IGT result approve a finished printed box?
No single substrate result establishes the finished box’s appearance or handling performance. Review the identified test result alongside a representative print and, when relevant, a finished sample with the proposed finish.
Is a blank wrap sample enough for approval?
It can support a decision about the unprinted material’s appearance and feel. It does not show the actual printed side, artwork coverage, or finished surface. Request the corresponding printed example before approving those features.
What should I do if only a few specks appear?
Keep the affected examples, capture their location in images, and ask the material and production teams to investigate. A limited-area pick test may not reveal localized debris, so its result should be considered alongside the defect evidence. ISO 3783:2006 scope, EVS
Can I compare a wax pick grade directly with an IGT result?
Treat them as separate methods with different reported endpoints. Ask the lab to explain each report and use a consistent, documented approach when comparing candidate materials. IGT Testing Systems: Surface characteristics
For a packaging project, discuss your project requirements with On The Way, including the printed face and the approval evidence you need.
Sources
- ISO 3783:2006 — EVS: Standard scope and limitations concerning local surface debris.
- Surface characteristics — IGT Testing Systems: Pick-test outputs and distinction between IGT and wax pick methods.