Archived from groups: comp.periphs.printers (
More info?)
In this case, they are really one in the same.
If, for example, Satoshi is using Photoshop, when he sets the image to
300 ppi, that is the resolution that will be used as the source for the
printer driver to create the raster image. Although in fact, the
printer will sample it at a higher resolution and use many more dots to
reproduce each "pixel" when printed, the end result in terms of the
image resolution will be based upon the ppi resolution selected in the
image software.
There is no need to confuse matters with the fact that Epson, for
instance uses 720 ppi/dpi with their consumer printer drivers to
"sample" the image and then may print in individual color dots of 2880
dpi on the paper to create those colors.
Basically, each ppi is translated into a ppi on the paper via the
printer's drivers.
When I spoke about drug store prints and custom lab prints, those are
really an abstraction, since they are usually not printed in a digital
or dot manner, but instead photographically on silver halide papers, so
we are referring to an apparent resolution if the print were to be tested.
Art
John McWilliams wrote:
> Arthur Entlich wrote:
>
>> Standard 4 x 6 "drug store" quality prints are about 200 dpi. A good
>> lab uses an equivalent to about 300-360 dpi. However, each inkjet
>> printer uses differing methods and driver software to distribute the
>> dots, so it is best for you to test and see what looks best to you.
>>
>> The type of printer, brand, model how many ink colors the printer
>> uses, all enter into this picture. You are best off to try the same
>> print with differing resolution and see which ones most appeal to you.
>>
>> In general, 300 dpi will supply quality results.
>>
>> Art
>>
>> Satoshi wrote:
>>
>>> I am trying to learn good photo printing technique with ink jet printer.
>>> I am wondering what PPI do you set to get good pictures.
>>> I currently resize images at 250 ppi for ip4000 printer.
>>> I would like to have your comment.
>>> Satoshi
>>>
>
> Except Satoshi was inquiring about ppi settings. Unless he wasn't.
>