Answer: Check supported media first, then assess opacity and show-through with your actual two-sided content. Paper weight alone cannot establish readable duplex output.
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Print Use Lab editorial project · Updated October 21, 2026 · Original decision framework and illustrative example. No physical product measurement or hands-on benchmark is claimed.
Why the distinction matters
A sheet can be within the printer’s weight range yet show distracting reverse-side content. Coating, opacity, caliper, ink behavior and the design itself contribute. Distinguish show-through from ink transferring or smearing, because they may require different checks. A denser paper is not automatically suitable for the selected duplex path.
A practical sequence
- Confirm the model supports the stock in the intended automatic or manual duplex mode.
- Print a representative two-sided proof with the actual text and graphics density.
- Inspect both sides under the lighting in which the document will be read.
- Adjust the layout or choose another documented stock if readability is inadequate.
Decision record
| Check | What it means | What to verify |
|---|---|---|
| Compatibility | Type, caliper and duplex limits | Permitted stock |
| Opacity | Reverse content visible through sheet | Readability question |
| Surface result | Smear or transfer | Different from simple show-through |
Worked example
An illustrative report has a dense dark chart behind a lightly printed text page. Even if both pages individually look acceptable, the combined duplex proof can be distracting. Moving dense charts to facing positions or selecting a suitable more opaque supported paper may improve the document.
Verify the result
Record the paper product and both-page design with the successful proof. Avoid inferring photo or label suitability from an ordinary duplex test. Those tasks have different media and surface requirements.
Download the editable CSV worksheet · Print-job workbook
Question and answer
Does a heavier sheet always show less through? Do not assume it. Check the paper’s stated properties and a supported proof; GSM does not uniquely specify opacity or caliper.
Sources and scope
- Brother: paper weight and thickness — A model-family example of separate feed, weight and caliper conditions; not a specification for your printer.
The decision sequence, diagrams, worksheet and worked case are our editorial work. AI assisted research, drafting and implementation. Official references support the named technical distinctions; examples do not establish real product performance.
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