59

The first photographic images printed in newspapers were actually wood engravings meticulously hand-copied from a photograph printed in the normal way. By the 1890s, however, prints were made in essentially the same way they are today: through halftoning — printing different tones as patterns of small dots varied in size and spacing. By the 1929s, this ...


33

According to Ken Rockwell: Fuji Velvia 50 is rated to resolve 160 lines per millimeter. This is the finest level of detail it can resolve, at which point its MTF just about hits zero. Each line will require one light and one dark pixel, or two pixels. Thus it will take about 320 pixels per millimeter to represent what's on Velvia 50. 320 pixels x 320 pixels ...


16

Strange question... You don't want to crop, you don't want borders, you don't want to stretch the image...but you want to somehow put one rectangle into another rectangle of a different aspect ratio. Those are the only options. What other options could there be? It's like putting a round peg in a square hole. Well, a rectangular peg in a rectangular hole. ...


15

Yes. And it usually depends how much you are paying. The more you pay per print, the more likely there will be a human factor. The big processors(wallmart etc) are unlikely to have the time or skill to go over files before print, its usually a plug-n-go system. I used to run a print shop - and I specialised in 2 things, Bulk prints, and high end art / ...


15

3840 x 2160 px means an aspect ratio of 16:9 - it is the reduced fraction of the pixel values: 3840:2160 -> (:20) -> 192:108 -> (:6) -> 32:18 -> (:2) -> 16:9 Since your images have an aspect ratio of 16:9 and 6" x 4" prints have an aspect ratio of 3:2, something will have to give: Either you live with the white space, or something needs ...


14

Interesting question. Please google "ISO test charts", or "test charts targets" To my knowledge that one is ISO-12233 "Digital Resolution Still Camera Test Chart". It is a bit expensive though, so you can find some other camera test chart options on Amazon, or perhaps find some second-hand on eBay. But as you want to use them in ...


12

I have found the free waifu2x very good for upsizing images. You can try an online demo. It uses "Deep Convolutional Neural Networks" to predict what the missing image data should be. It works better for line art, but is definitely acceptable for photos.


12

I was apprenticed to a photoengraving company in 1946. We used the Colodion or Wet plate process to make halftone negatives and a glass cross line screen. Newspapers used a coarse screen with 55 to 75 lines per inch. Magazines used from 100 lpi to 150 lpi depending paper and press used by the printer. The glass plates were hand coated with iodised colodion ...


11

It's not the size; it's the shape. Specifically, it's the aspect ratio. That's the relative "squareness" of a photo format. For various historical reasons, there are a lot of different ones, and, as you've noticed, they don't line up. See What historic reasons are there for common aspect ratios? if you're interested in exactly why we ended up in this ...


10

The answer to this depends on the viewing distance. The usual rule of 300 PPI works well for close-up viewing, but even that isn't a hard-and-fast rule. What's more important is Pixels-Per-Degree (PPD), which is more representative of our eye's ability to resolve detail, and is dependent on a specific/typical viewing distance. Apple's Retina displays (...


10

Image resolution/pixel dimensions are the attributes you should probably be looking for. To find out what numbers you should specify in your requirements, you'll need to decide on the maximum size that you'll want to print an image from the archive, then from that you can derive the minimum resolution that images in the archive should have. For example, if ...


9

Lab employee here. I can't speak for all labs but here's how it works at mine (note that we do both photographic and press printing as well as a few other methods). It all depends on the type of equipment that is going to be printing your product. Traditionally photographic prints are done on a minilab or equivalent piece of equipment which prints in RGB. ...


8

I find that the Wikipedia article on Photogravure gives a good detailed overview of the subject. An easier to follow and shorter version can be found in this description of the process. Here's the summary of the technique: Contact-print a positive onto a layer of gelatine sensitized in potassium dichromate. This hardens the exposed parts of the gelatine. ...


8

TLDR: Choose a print shop that provides ICC profiles. Soft proofing is an important step for optimal results. If a shop doesn't share its profiles there are two reasons that come to my mind: lack of knowledge (very bad), or different printer types for the same printing product, meaning multiple orders could give different results even with the same ...


8

When I got the print back it was so dark as to be unsellable. Rather disappointed I contacted the printers and they said I should have used an ND filter. An ND (neutral density) filter would have made your image even darker, so it's hard to see how that would've solved your problem. Perhaps they meant a graduated ND filter, which could reduce the brightness ...


8

Yes, PNG is theoretically better than JPEG in preserving the ultimate image quality, but in practice this is the kind of exactness we don't really see, especially in print, where the physical properties of the paper and ink technology limits what can be achieved. For convenience, just stick with the universally accepted JPEG and be happy with smaller file ...


8

See here. Of course it has to be printed correctly to be of any value.


7

True contact sheets were made with the film in contact with the paper, so the images were exactly the size of the negative. With digital you can choose whatever size you want. If you are using it to select images, then it depends on how similar the images are. If they are very similar and you print them small, it's going to be hard to choose which ones ...


7

First, one need not spend $10,000 on a printer to get a wide gamut. To be specific, to PRINT wide gamut, you don't need to spend a lot of money. There is often an implicit association between managing color and printing wide gamut, however the two are actually separate activities. These days, the actual process of managing color is automated by ICM, which ...


7

This turns out to have a simple, non-technical, amusing answer: I was loading the paper upside down. The glossy side should be face down, but I'd loaded it face up. Once I fixed that, it started working.


7

The idea that you will get better prints at exactly 300dpi — where one dot is also one pixel — is a misconception. There may have been a limited time and certain circumstances where it was true, but that's not the case now. There is no harm in having more pixels. You should be able to find 12×9" prints and frames relatively easily, and print at around ...


7

It wasn't at all unusual for small, local portrait studios to print using the direct contact method during the time in which Disfarmer worked from about 1915 until his death in 1959. Most small studios that concentrated on producing family portraits for the people living in the immediate area around the studio probably did not even have the needed enlarger ...


7

Since they don't print very frequently, they often have the ink-drying-up problem that leads to clogs/poor print quality, which means more maintenance routines that use up even more ink and cost them a lot of money in the long run. So I'm planning on getting them a new printer for Christmas. Given this, I'd suggest a gift card to an online printing service. ...


7

The Canon EOS 5D Mark III has a resolution of 5760 x 3840 pixels, or 22.1 MP. It has a 3:2 (1.5:1) aspect ratio. A2 sized paper is 16.5 x 23.4 inches (420 x 594 mm). It has a 1.414:1 aspect ratio. This means we must either: Leave blank spaces at the top and bottom of the paper to use the full image width on the width of the A2 paper. This would leave us ...


7

I am basing my answer on this I envision as a book in the end. So my first recommendation is beyond the technical elements you are asking for. 1. Frame a bit wider than the frame you like. A printed book normally has a different proportion than a 3:2 sensor. A designer could choose to maintain the proportion of the photo if showing the full image is ...


6

Imposing a minimum DPI value is meaningless as images do not have any intrinsic physical dimension. A better approach is to work out the maximum size you want to guarantee to be able to print, work out the image size in pixels necessary to achieve 300 PPI at this size, and then impose a minimum on the image dimensions in pixels.


6

Hope this helps - Asked my Canon Rep as I was also interested and this is what he sent me; The ICC profiles installed for your printer and Canon photo paper appear as follows. CANON - PRINTER MODEL < PAPER TYPE> PRINT QUALITY (For example: Canon Pro9000 PR1) (1) Printer model name (2) Media type Each letter pair represents its respective Media ...


6

Wet silver color printing is slow, tedious, and requires trial and error to get the color balance right. I don't miss those days. Even if you want to cling to film for some reason, scanning the film then printing digitally is much easier, repeatable, and faster. My process went something like this (it's been 20 years or so): Turn off all the filters to ...


6

You understand the situation (that dpi number does not affect the pixels), and in this situation (before considering actually printing the image), always setting 300 dpi is a good politically correct action that will please those that don't understand what it means (or doesn't mean). Digital image size is specified by dimensions in pixels, not by inches. ...


6

I'm not sure this question really belongs here, but will try to help as there isn't a printing stack.... As an ex Epson engineer, I can say that you (quite clearly) have no matte black feeding. Remove the cartridge, shake it, is it empty? If not Have you left the vacuum seal tab on the cartridge?


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