印大相、油畫相製作 FAQ
Professional Photo Printing/ Fine Art Printing - FAQ
We are the experienced specialist who can turn your file into wonderful art pieces, but we can't always solve file problems for you. This FAQ can help you avoid common mis-conceptions & problems to get the most out of our quality productions.
Of course, we always carefully check the files & info, so you may just need some basic understandings & be confident to our suggestions when problems are found.
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What should I pay attention to, when choosing a file? |
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Image resolution has to be sufficient. Attention: many mobile apps (e.g. whatsapp/email) will auto downsize photos, making them inadequate for quality printing. |
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Print & file aspect-ratio must be the same. |
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Whether the subject/ logo/ signature is placed too close to the image-border (which falls into the bleeding area). |
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Enlarge the image to “100% crop” to check for defects, such as blurring, excessive noise, sensor-dust or undesired facial expressions. |
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How to know if a file has sufficient resolution? |
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Unit of resolution is dpi(ppi) – dot(pixel) per inch. Resolution isn't always in direct proportion with file size, but a less than 2MB jpg is likely inadequate for quality printing. |
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E.g., if the length of your file is 4500px, and if you want to print it at 30”, 4500/30=150dpi print-resolution. |
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In most cases, we'll rate 200dpi as very good, 150dpi as good, 120dpi as decent, and 72dpi as an acceptable bottom-line. |
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Different from book-reading texts which requires very high-resolution, wall decorations are viewed at some distances, the proportion of the photo and the wall is of higher priority because it affects the overall presentation/aesthetics, as long as resolution is still decent. |
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A high-res image can be blurry because of digital zoom/ enlargement, camera-shake, subject out-of-focus, or poor lens performance etc. |
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We will interpolate-enlarge and sharpen the file in a subtle & natural manner if needed. We don't recommend customers to do so before submitting the file to us. |
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It is length:height proportion of the image. |
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E.g., if long-side / 3 x 2 = short-side, it is 3:2; if long-side / 4 x 3 = short-side, it is 4:3 |
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It is 3:2 for 135-format, APS-C cameras; 4:3 for 120-format, 4/3 and most smartphone cameras. |
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Print & file aspect-ratio must be the same, otherwise part of the image will disappear in the printout (red area shown below) |
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If there's aspect-ratio mis-match we will suggest the correct print size, but we can't crop photos for customers because it's a matter of preference, or aesthetically uncroppable |
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In most types of printing including some common photo printing, a few mm of the file-border can't be printed on the paper, this disappeared area is called "bleeding-area". Every truely professional designers & photographers know this limitation and avoid placing important subjects too close to the border. |
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Our giclee-printing can print everything without bleeding. But during framing, image-border will still be lost/not viewable because it is covered by the frame rabbet or passe-partout (or trimmed/folded away in some frameless-style products), we call it "frame-bleeding". |
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Therefore, the viewable-size of a framed image is usually smaller than the original print-size. |
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Avoid placing important subject/ logo/ signature too close to the border (lower-left) otherwise part of them may disappear because of frame-bleeding (orange border of the lower right). |
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Is the color of the print accurate? |
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Giclee-printing is well-known for its wide color gamut and high color accuracy when the print-operator is an expert, and high-quality print-media is used, which is our case. |
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But oversimplified speaking, most monitors aren't accurate (brightness/ colors are free to tune), so that a color-accurate print-out may look different from a monitor. Since monitors emit light but print-outs don't, photos mostly look brighter when viewing with a monitor than on a color-accurate printout. |
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Monitor accuracy can be achieved by using a high-quality monitor AND calibrating with a spectrophotometer in a professional way. |
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Color-management is very complicated knowledge, overlooking just one keypoint or without actual experiences can cause serious misconception. Trust that we are PROFESSIONAL when we raise a problem. |
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If we judge that the brightness of your image isn’t good enough, we will provide suggestions/ solutions. |
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Special note for B&W photos: the grey colors of B&W photos from different era/companies/printing machines/photo papers are likely different, this can be apparent if displayed side-by-side. |
This is an oversimplified version of our FAQ, please find the more detailed versions HERE. |
