Digital Proof, White Sample, Printed Prototype or Press Proof: Which Packaging Proof Do You Need?
Quick answer
A digital proof checks artwork, text and position on the dieline. A white (blank) sample checks structure, size and fit. A printed prototype shows graphics on the real shape, but usually with a different print process. A pre-production press proof is printed on the production equipment with the real inks and finishes, so it is the only proof that fully predicts colour and finish. Most projects need a digital proof plus a white sample; add a press proof when exact colour or a special finish matters.
Quick facts: Custom Boxes
- Indicative unit price: about US$0.05–0.10 per piece. This is a guide, not a quotation: the final price depends on size, material, print colours, finish and order quantity.
- MOQ: typically from 500 pcs per size and artwork; the confirmed minimum depends on material, print method and features and is stated on the quotation.
- Lead time: Physical samples 5–7 working days after artwork is confirmed; bulk production 20–30 days after sample approval.
- Who makes it: BestPackFactory’s own factory in Longhua District, Shenzhen, China. Free dieline and artwork proof within 24 hours. See real samples and videos.
- Specifications and quote: Custom Boxes · Request a quote
The four proof types compared
| Proof type | What it is | What it proves | What it does not prove |
|---|---|---|---|
| Digital proof | PDF of the artwork placed on the dieline | Text, spelling, barcodes, positions, bleed, panel orientation | Colour on the real board, structure, fit |
| White (blank) sample | Unprinted sample cut and made from the specified material | Size, fit of the product and insert, closure, strength, feel | Graphics, colour, finish |
| Printed prototype | Sample printed on a digital printer and cut on a sample table | How the design wraps the structure, overall look for photos and approval | Exact production colour and finish, because the print process differs |
| Pre-production press proof | Printed on the production press with the real inks, board and finishes | Colour, finish, registration and full appearance of the order | Nothing major, but it costs more and takes longer |
Digital proof
The digital proof is the artwork check. The supplier places your file on the dieline and returns a PDF showing every panel, the bleed, the glue area and any print marks. Use it to confirm text, legal copy, barcodes, logos, panel orientation and which way artwork reads when the box is closed. A screen does not show colour reliably, so do not use a digital proof to approve colour. Some suppliers also offer a wet proof, printed with the real inks on the real board on a proofing press, as a step between digital and press proofs. If a colour-managed hard-copy proof is offered, ask which printing condition it simulates (for example a condition defined under ISO 12647) and on which paper; it is closer than a screen but still not the real board.
White (blank) sample
The white sample is the structure check. It is made from the specified material without print, so problems are cheap to fix. Put your actual product in it, close it, open it, stack it and ship it if you can. Use it to confirm inside dimensions, insert fit, closure strength, magnet or tuck behaviour and how the box feels. Approve the structure before artwork is finalised: changing a dimension after printing plates or tools are made adds time and cost.
Printed prototype
The printed prototype combines the structure with your design, usually printed digitally. It is good for internal approval, photography, a trade show sample or checking that graphics line up across folds. Its weakness is colour and finish: digital print, foils simulated with other methods and hand-applied finishes can look different from offset or flexo production. Treat the prototype as a design reference, not a colour standard, unless the production order will also be digitally printed.
Pre-production press proof
A pre-production press proof (often called a production sample) is printed on the same press, with the same inks, board, coating and special finishes as the order. It is the closest preview of mass production and becomes the physical reference for colour approval. It typically costs more because it uses plates and press time, so it is worth it when:
- brand colours must match an existing product or a strict colour standard;
- the design uses spot colours, metallic inks, foil, embossing or soft-touch coatings;
- the order is large or repeats regularly, so the approved sheet will guide future runs;
- the packaging is sold at retail next to earlier stock and must look the same.
If you approve a press proof, sign and keep the physical sheet, and record the agreed tolerance. See the colour tolerance approval guide for how to write that record.
Which proofs do you need?
| Situation | Recommended proofs |
|---|---|
| Repeat order, no change | Digital proof to confirm file version |
| New artwork on an existing structure | Digital proof; press proof if colour is critical |
| New structure, simple print | Digital proof + white sample |
| New structure and new brand look for retail | Digital proof + white sample + printed prototype, then press proof |
| Special finishes or exact brand colour | Digital proof + white sample + press proof |
The full sequence from mockup to approved sample is explained in the packaging sampling process guide, and the checks to run before you sign are in the sample checklist before mass production.
What to ask for in your RFQ
- Which proof types are included in the quotation and which cost extra.
- Whether the printed sample is digital or made on the production press.
- The material, coating and finishes used for each sample.
- How changes after each proof are handled and re-proofed.
- Which approved item becomes the reference for mass production.
BestPackFactory quotes custom boxes and other packaging as B2B projects with MOQ 500 PCS; the proof types, sample cost and timing for your project are confirmed in the quotation.
Common mistakes
- Approving colour from a screen or a PDF.
- Approving a printed prototype as the colour standard when production uses another print process.
- Skipping the white sample and discovering the insert does not fit after printing.
- Changing artwork after the press proof without asking for a new proof.
- Not keeping the signed physical reference for repeat orders.
Frequently asked questions
Can I approve colour from a digital proof?
No. A digital proof checks text, layout and positions. Screens do not show colour reliably on the real board, so approve colour on a press proof or an agreed physical reference.
What is a white sample in packaging?
A white or blank sample is an unprinted sample made from the specified material, used to check size, product fit, insert fit, closure and strength before printing.
Is a printed prototype the same as a press proof?
No. A printed prototype is usually digitally printed, so colour and finishes can differ from production. A press proof is printed on the production press with the real inks and finishes.
When is a pre-production press proof worth the cost?
When brand colours must match closely, when the design uses spot colours, foil, embossing or special coatings, or when the order is large or repeats.
Related pages
Prepare a quote-ready packaging brief
Send your structure, artwork status, finishes and the proofs you need, and the proof plan is confirmed in the quotation. Projects are quoted as B2B orders with MOQ 500 PCS. You can also reach Lisa on WhatsApp +86 158 8653 0985 or at lisa@colorprintingpackage.com.
Request a project quote