Soft proof or hard proof before a bulk print run: which one answers your colour question

Soft proofing is the simulation of the print-out of a picture on the monitor, and it needs the appropriate ICC printer profile [3]. A hard proof, as known in offset printing, is a pre-print made on paper [3]. One is a simulation on a screen. The other is a physical piece you can hold. In this guide, a hard proof also covers a physical sample made on the run material. That wider use is our own usage, not a claim from the sources.

For profile and file-format detail, see our colour management guide. This article stays on the soft versus hard decision.

A calibrated monitor and a matching printer profile give a prediction, not a certain result. Datacolor says the soft-proof view and the printout match depending on the quality of the profile and the light source [3]. It also says no printer can reproduce all the visible colours a monitor can show, and that CMYK inks cannot do it even with six or more colours [3]. A soft proof shows which colours the printer cannot display [3].

A soft proof is only as trustworthy as the screen it appears on. The ICC FAQ says that to get consistent quality across monitors, they should be calibrated for brightness, contrast and colour balance and then profiled, and that a monitor colour measuring instrument is needed to calibrate properly [2]. Datacolor advises calibrating at regular intervals, about twice a month, because monitor colour shifts over time [3]. Datacolor's guide is a 2009 vendor how-to written around Photoshop, so treat its steps as one vendor's workflow and confirm with your own printer.

You also need the printer profile for your paper and ink, or the one from the printing service. If a printer answers a profile request with "sRGB", Datacolor says to reconsider the provider [3]. The ICC FAQ also notes that production of profiles is not an exact science and a monitor profile may need visual tweaking [2].

The paper or material changes the result. Datacolor says a printer profile describes the colour reproduction of the printer's ink and paper, and that different paper or ink needs a new custom profile [3].

The ICC FAQ notes that in a proof-matching situation there is always a potential risk if the papers used for proofing and printing have radically different fluorescence [2]. The same ICC FAQ answer reports that a number of people argue most viewing booths have a lower UV content than the daylight they are supposed to simulate, so the viewing light can change how a fluorescent paper looks [2].

Light matters too. Datacolor describes using a standard light box with a fixed colour temperature of 5000/6500 Kelvin to judge a printout, and warns that a different source such as halogen can cause a colorcast [3].

Proofs have limits of their own. Inkjet proofers can produce saturated colours that exceed the capabilities of a press, so the profile has to keep them from showing colours the press cannot reproduce [1]. Approving a physical piece made on the same material and condition as the run reduces this mismatch, because you are judging the real item, though the viewing light still matters. This is our own practice-based advice.

• "Which colours can the printer not display?" A soft proof can show this, if the screen is calibrated and the profile is right [3].
• "Can I fix those colours?" You can adjust the image in the soft-proof view, but keep a backup of the original file [3].
• "Will this match my brand colour on the finished product?" Ask for a physical piece, because in our view a soft proof is a prediction of the printed picture, not of the finished item.
• "Can we approve the bulk run?" Approve a physical reference, in writing, made on the real material, with the viewing light and the material noted in the approval.

The table below sets the two side by side. For file settings, see our canvas resolution and colour guide.

1. Ask for the printer's ICC profile for your paper or material, not a general working space such as sRGB [3].
2. Ask how the printer handles colours outside its gamut. Datacolor notes the rendering intent decides how out-of-gamut colours are converted into the printer's smaller colour space [3].
3. Ask for the sample on the same material and finish as your order. For canvas, wallpaper or fabric, do not accept a paper stand-in (our own advice).
4. Judge the physical sample under a standard light source such as a light box [3]. See our sampling guide.
5. Write the approval down, as described in the next section.

This guide is general information. Confirm the exact steps with your printer.

This checklist is our own practice-based advice, not taken from the sources. A written approval note is easier to check later than a verbal yes. Include these points:

• The product and the material it is made on.
• The colour reference you are matching, such as a swatch name or a physical reference piece.
• The viewing light the piece was judged under.
• Who approved it.
• The date of approval.
• A request that the approved piece is kept as the reference for the run, so later pieces can be compared against it.

Judge the finished product, not only a flat colour patch, because the colour you care about is the one on the item you will sell.

ArtzFolio is a private-label and OEM/ODM manufacturer in Noida, serving businesses and brands only. Samples are paid, and the cost may be reimbursed or adjusted in your final order by agreement. Tell us in your enquiry which colour you need to match and how you want to approve it. For payment and shipping terms, minimums and lead times, see pricing, minimums and lead times, or contact us; we reply within 1 business day.

1. Proof-to-Press Match, Part 2: The Role of the Profile, Printing United Alliance. printing.org (read 2026-11-08)
2. ICC Frequently Asked Questions, International Color Consortium (ICC). archive.color.org (read 2026-11-08)
3. How to print correctly using an ICC-Printer-Profile under Adobe Photoshop (vendor how-to, copyright 2009, Photoshop-specific), Datacolor. datacolor.com (read 2026-11-08)