questions

Canvas type and lacquering

In our leinwanddruckshop we offer you only one well approved and economically priced type of canvas, a canvas called Poly. It has a fine and even structure and colours come out very brilliant and well defined, among other things because of its nano-coating. Canvas Poly's thickness is 550 um.

The printing quality is easy to characterize: blameless photo quality. Even yellow writing size 6 point on a black background is well readable. A photo still looks like a photo even while printed on canvas!

If you wish other types of canvas, other sizes not mentioned here or impair units: please visit our main web-side.

All our canvas/ fine art prints are lacquered with a double coating to protect it from uv-radiation - always and without exception!

Printer and light fastness

We print on the ink-jet 12 colour printer Canon IPF 9000 with original Canon Lucia pigmented ink. We assume that our prints are lightfast for many years. However you should avoid an exposure to direct insolation if avoidable. We print sizes between 18 x 18 cm (minimum`) and 145 x 300 cm (maximum).

Short Information about Colour and Resolution of Prints

Actually, it is very easy to print. If there is no differing colour profile in your data we take the usual profile: Standard-RGB. Some cameras use Adobe-RGB 1988. Please check your digital camera and your photo program.

Please fix the colour profile of your working space profile while saving your data if possible.

Printing very colourful pictures may cause colour changes in the print because there are RGB-colours which cannot be printed, but we will take care to keep these changes as slight as possible.

Necessary Photo Resolution - Pixels and Photo Quality

You know your photo's number of pixel, size and resolution or your photo program will tell you. Using this information, you are able to calculate immediately in which size the photo can be printed.

The easiest rule is to take a picture with 72 dpi* = 28 pixel/ centimetre. After extrapolating the photo, it will be possible to print it in a very good quality. The more pixel you have, the better the photo will be, of course.

Even sizes of 45 dpi = 17 pixel/ centimetre can still be printed satisfactorily, but it depends on the details of the photo and which quality is desired by the customer.

We would like to check this for you, please send us your photo.

size of picture	pixel	= print possible up to
100 cm with 72 dpi =	2835	100 cm, print in good quality or 165 cm, print in fair quality
100 cm with 45 dpi =	1770	100 cm, print in fair quality after some extra preparation
good quality:		number of pixel : 28 = size of print (cm)
still fair quality:		number of pixel : 17 = size of print (cm)

Example:

digital photo 2000 x 3000 pixels = 6 mega-pixels => relation between sides = 2:3

2000 : 28 = 71.4 and 3000 : 28 = 107 => print is possible up to 71.4 x 107 cm (70 x 105 cm) with good quality

2000 : 17 = 117.6 and 3000 : 17 = 176 => print is possible up to 117.6 x 176 cm (115 x 175 cm) with fair quality, depending on the motif even a little bigger

Advise: You will find the number of pixels, resolution and size of the picture in your photo program, usually under "size of picture" oder "rebuild picture". If you chose "calculate newly" or "keep original size" you will see it putting 72 dpi for good quality and 45 dpi for fair quality.

Photos with a low resolution can be prepared with special filters for a little extra charge and with a certain painting effect we will be able to print them meterhigh. These effects look really interesting, but it will not be "photo quality" any more.

*1 dpi = 1 dot = pixel per inch = 2.54 cm => 72 dpi = 72 pixel per 2.54 cm = 28 pixel/ cm

Attention: JPG

Many digital cameras provide different photo formats, e.g. JPG, TIF or RAW, sometimes even RAW and JPG. The last one is perfect for our purpose! JPG allows a quick first impression, while RAW-photos are needed for high-quality TIF-pictures. Please do not send us RAW-data because it is like raw diamonds. You have to do the extraction to TIF with LZW-compression (good) or JPG (preferably not) yourself, because there are too many possiblities for changes, which are a question of taste mostly.

Photos which will be printed big should not be saved as JPG or if so, at least in "best quality" once in the camera or after the extraction out of a RAW-photo.

You should avoid repeated saving as JPG because the picture will become bader after each saving, especially if colours were changed. Similar colours will be extrapolated to "blocks" by the photo program to save memory capacity. Our example shows how ugly this can look. The picture is destroyed for ever. We use a special preparation system against this phenomenon and try to repair it but normally it still will not be perfect.

This mistake has nothing to do with a low resolution!

Important: the LZW-compression of TIF-photos will provide a larger data file, but no losses are risked and it can be used as often as necessary without damaging the photo.

Extensive and repeated compression can cause "JPG block mistakes"

You want to calculate your resolution yourself? See here:

Information concerning the printing size of canvas prints/ fine art prints

print resolution for inkjet prints up to 1200 x 2400 dpi photo quality We extrapolate the number of pixel for photo prints to the following numbers:
up to DIN A3 (297 x 420 mm)	300 dpi
DIN A3 - A2 (297 x 420 mm - 420 x 594 mm)	200 dpi
DIN A2 (420 x 594 mm up to 100 cm (longer side)	150 - 200 dpi
from 100 cm	100 - 150 dpi
Please do not chose your resolution higher than the resolution referring to the final size of the print. We print with 1200 x 2400 dpi photo print quality. To extrapolate the pictures we use a special program called S-Spline 2.2, which is better than the usual photo program. That's why we look forward doing it for you!

Attention: JPG

Photos which will be printed big should not be saved as JPG or if so, at least in "best quality" once in the camera or after the extraction out of a RAW-photo.

print resolution for inkjet prints up to 1200 x 2400 dpi photo quality