Hardcopy printing dots per inch, including of jpg files of photographs

[William Overington]

Is printing ever done at more than 300 dots per inch please?

Is photographic printing from a jpg file ever done at more than 300 dots per inch?

I am trying to produce artwork to get a couple of these two-sided keyrings.

https://www.tescophoto.com/personalised-gifts/photo-keyrings-fridge-magnets/acrylic-photo-key-ring.html

I have the size worked out, the story is in the following thread, but is not essential reading for this question.

https://forum.affinity.serif.com/index.php?/topic/145559-hardcopy-output/

It is just that the dots per inch is the final bit of the puzzle. I am wondering if using 300 dots per inch is likely to be too low resolution.

William

 

[Old Bruce]

Look at an actual hard copy of a magazine you admire. Are the pictures good enough? They are going to be 300 or fewer dpi.

[William Overington]

Thank you.

So I am thinking of making the artwork 35 millimetres wide by 45 millimetres high at 300 dots per inch.

William

 

[BofG]

There's a common misconception that an image's pixels per inch is the same as a printer's dots per inch.

I regularly print at 1200 x 600 dpi. I never go above 300 ppi for the source image.

[William Overington]

20 minutes ago, BofG said:

There's a common misconception that an image's pixels per inch is the same as a printer's dots per inch.

I regularly print at 1200 x 600 dpi. I never go above 300 ppi for the source image.

Does that mean that regardless of what they do at the print facility that 300 dots per inch is fine for what I export from Affinity Designer?

William

 

[BofG]

15 minutes ago, William Overington said:

Does that mean that regardless of what they do at the print facility that 300 dots per inch is fine for what I export from Affinity Designer?

William

 

35 x 45 mm is obviously a small print, and the resolution is normally inverse to size (a billboard is very low dpi), hopefully they will be printing at a high dpi on that. I don't imagine you would notice much if any difference going about 300ppi for the source image though.

As with all of these things though it really is a question for the printers. For example, maybe they will downscale anything above 300 ppi (aka dpi), and if that is the case how well do they handle it?

[Alfred]

5 minutes ago, BofG said:

35 x 45 mm is obviously a small print, and the resolution is normally inverse to size (a billboard is very low dpi), hopefully they will be printing at a high dpi on that.

I can’t imagine they would go very high for photos on a keyring! It isn’t as though anyone is going to examine it with a magnifying glass (as you might do, for example, with an ordnance survey map).

[BofG]

3 minutes ago, Alfred said:

I can’t imagine they would go very high for photos on a keyring!

I guess neither of us know the price of this keyring so who's to know what quality to expect

[Alfred]

23 minutes ago, BofG said:

I guess neither of us know the price of this keyring so who's to know what quality to expect

There’s a link in William’s OP. £2.50 each, plus a delivery charge of £4 if you’re unwilling or unable to collect them from your local store.

[BofG]

10 minutes ago, Alfred said:

There’s a link in William’s OP. £2.50 each, plus a delivery charge of £4 if you’re unwilling or unable to collect them from your local store.

Not sure how I missed that it was Tesco. For the price I wouldn't expect miracles.

 

[William Overington]

2 hours ago, BofG said:

Not sure how I missed that it was Tesco. For the price I wouldn't expect miracles.

 

Here is the link.

https://www.tescophoto.com/personalised-gifts/photo-keyrings-fridge-magnets/acrylic-photo-key-ring.html

I am thinking of getting two (not the same as each other) as the £4 charge for delivery is fixed for the order, not the item, so £9 for the two including delivery.

The reason I am getting it is because it is because the two-sided keyring is the closest that I can get on a low budget to something like my design for a Hi! and Bye! two-sided tote bag that communicates through the language barrier.

Hi!

 

Bye!

 

 

Actually, I find that a lot of Tesco own label food items are excellent, they get them made under contract, a lot depends on the supplier.

Tesco has been magnificent in getting grocery to me in the pandemic, unlike some businesses they put their existing customers first, never any "new customers only" offers.

 

William