Proof before batch printing: don't gamble on the entire batch

Proofing is not a mere formality. This is the only step that allows you to see the final product before the printer runs the entire batch. Skipping this step to save a small amount could result in you discarding an entire print run worth many times more. Errors discovered after a large quantity has been printed often cannot be corrected.

Three proof levels, three different purposes

Many people use "proof" to refer to all forms of previews, but in reality, these three levels serve three different needs and cannot replace each other.

• Soft proof (viewing on screen, usually a PDF file): suitable for reviewing layout, checking spelling, and content in the early stages when quick editing loops are needed. Screens display brighter and more vibrant colors than paper, and do not replicate how ink absorbs into the material surface, so soft proof is not used to finalize color.
• Hard proof (standard color physical print sample): printed on the correct type of paper or material of the actual batch. This is the most convincing form of proof to evaluate color and surface feel. Contract proof is a type of hard proof that has signatures from both parties, used as a benchmark for the machine setup before running the batch. For packaging, it is advisable to add a white die-cut sample on real paper, as the test print does not show the actual paper, lamination, foil stamping, or die-cutting.
• Press check (sample setup at the start of the print run): conducted as soon as the machine starts running, on the correct paper and ink of the batch. It provides the closest result to the final product. However, this is not the time to correct content or layout, as the machine is ready to run. Any adjustments at this stage can be costly.

When to create which type of proof

Not every project requires all three levels. You can choose based on the risk level and requirements of each print run.

• Use soft proof during the design review stage, requiring quick feedback on layout and text.
• Create hard proof when color is important (logo, brand's primary color), when there are major design changes, or when switching to new printing conditions such as changing paper, ink, or factory.
• Request press check for large batches or products that require high color accuracy, such as cosmetics or premium goods. It is also advisable to request it when you want to review directly on the machine before running.
• Create new proof whenever changing printing houses, paper, or ink, even if the design file remains unchanged, as different printing conditions yield different results.

Common errors when approving samples

• Approving colors through soft proof and then printing a batch. When you receive the final product, you may discover color discrepancies, and at that point, there is nothing left to fix.
• Creating hard proof on paper is different from printing real samples. The mock-up does not accurately reflect the results, and even after approval, there is no solid basis.
• Wait until the press check to want to adjust text or layout. At this stage, the machine is ready to run, and any content changes will incur significant costs and time.
• There is no signatory on the approved sample. When the final product color is disputed, there is no reference point to compare between the client and the printing house. Therefore, sign off on the approved sample, record the name of the reviewer and the date, with each party keeping a copy, then accept the batch by comparing it to that sample.

The true cost of printing is not in the design fee but in the batch of defective prints that must be discarded.

Practical experience.

Sinh Vũ does not guarantee printing prices and does not represent the printing house.

This article is for reference. The scope, pricing, and specific commitments of Sinh Vũ are detailed in the proposal and signed contract.