How we research and recommend
Research-based review; not hands-on tested. Every Packing Desk review carries that note because it's true: we compare products using documentation, not by using them. This page explains exactly what that means.
Sources, in order of preference
- Manufacturer manuals, spec sheets and support articles. These are the most precise and most likely to state conditions (OS versions, media limits, tolerances).
- Manufacturer product pages. Useful but sometimes inconsistent; when a maker's pages disagree, we say so and show both values.
- Manufacturer documents hosted by third parties (for example, a manual on ManualsLib). We label these as third-party hosted.
- Authorized retailer specification tables, used only when the maker's page couldn't be read. We label these too.
We read a source before citing it. Customer reviews, forum posts and seller comments are not used as evidence, and we never present anyone else's experience as our own. Every review ends with its source list and the date we checked.
Behind the scenes we keep a private source ledger: for each important field, the source, the date, the evidence type and whether the value is verified, partial, conflicting or unknown.
Compatibility statuses
| Status | What it means |
|---|---|
| Confirmed | The manufacturer documents it for this exact model. |
| Conditional | It works with a stated condition—an app, a setup method, an accessory—or the published specs match but the maker doesn't name the pairing. The condition is always shown. |
| Not supported | The maker says it isn't supported, or published specs rule it out (for example, a roll larger than the printer's maximum). |
| Unknown | Not documented. Unknown never means compatible. |
We keep a few distinctions strict: Bluetooth is not AirPrint; a maker's phone app is not native phone printing; being able to print a downloaded PDF is not the same as a marketplace integration; and a printer sold "for shipping" isn't automatically compatible with every carrier workflow.
Scales
Capacity, display increment and accuracy are three different things. A 0.1 oz display step is not a 0.1 oz accuracy. We only list a tolerance when the maker publishes one (DYMO does for the M25), and we only call a scale NTEP-approved when the maker documents it. "Legal for trade" also requires local Weights & Measures certification. No scale guarantees correct postage or prevents carrier adjustments.
Amazon listings (ASINs)
Our research tools can't open Amazon product pages, so we match listings using search-index listing titles restricted to amazon.com and the manufacturer's model or part number. Each mapping has a recorded confidence. If we can't tie a listing to the exact model or bundle, the review stays up without a buy button. Listings change: always confirm the model on Amazon before buying.
How we rank
Products are ranked within a category for a stated use (for example, "phone-first Bluetooth printer"). We use recommendation tiers rather than numeric scores, because numbers imply measurements we didn't make. Commission rates play no part; higher-priced products are not ranked higher for being higher-priced.
What we don't do
- Claim testing, measured throughput, print-quality judgments or photos we didn't take.
- Show prices, star ratings, customer-review text or stock status.
- Use scraped product images. Pages are text-first until images are properly licensed.
- Invent authors, credentials or experience.
Updates
We recheck popular pages and compatibility claims periodically, replace discontinued products, and fix broken links. A page's "updated" date changes only when its content changes substantively.