Announcement

**UtwigMU** · 11 May 2003, 13:55

If your image is RGB, ask your service burau which CMYK settings they need when converting colours.

CMY channels look the same as RGB channels, however black is introduced to accentuate midtones and especially shades. Thus total black is generally 360-400% (sum of C, M, Y and K inks).

approximately (of Euro POS)
C M Y K

5 3 4 0 white point
55 45 50 X midpoint
95 90 90 85 dark point

Generally noncoated papers have higher dotgains, so ink saturation at different points is lower.

You can correct your colours using colour sampler tool (next to eyedropper), placing samples at appropriate spots and using Image->Adjust->Selective color (absolute).

This applies if your picture is of natural objects (nature, people, etc...)

If your image is rasterized vector image (logo, graphic, illustration,....) then draw in CMYK in your illustrating app, rasterize (it's better to leave it in vectors or even vectorize by hand or by using application such as Corel Trace) and leave colours alone.

**Helevitia** · 11 May 2003, 17:56

Holy sheep dip! This is more information than I ever hoped for! This is why I love MURC! You guys rule!

UtwigMU, thanks a bunch for the rather in depth info. This will go a long way in helping me out. As far as the image is concerned, it is made up of one scanned image and 5 jpg images. The rest is text or insignifcant. I guess I could post it but then I would have to explain what I am doing

And I feel kind of

about it.

OK, **** it, I will just explain what I am doing, maybe it will help more. I am making a banner for a concert that I am going to, but this isn't just any concert, it is a concert given by the group for club members only. In other words, you can't buy tickets to the show, only get them through the club. Well, this is a dream of mine to see Metallica in a small club and the FREE part is a bonus. Well, I want to show them how much I appreciate it so I am making this 'thank you' banner for them and then all of the club members will sign it. Now, keep in mind that I am no artist so don't laugh too hard. This is just a banner for people to sign. And I suck at photoshop

Here it is:

**Jon P. Inghram** · 11 May 2003, 19:30

Hehe, that's more than big enough to look decent on a 4'x6' poster. Just make sure there's no confusion about file formats and what size the final print will be and it should work out great.

**Helevitia** · 11 May 2003, 20:13

Originally posted by Jon P. Inghram
Hehe, that's more than big enough to look decent on a 6'x9' poster. Just make sure there's no confusion about file formats and what size the final print will be and it should work out great.

Cool thanks, that what I was hoping to hear

Dave

**Jon P. Inghram** · 11 May 2003, 21:09

If your original was 6"x9", that worked out to 200 dpi. Blowing it up to 4'x6' raised the resolution from 1800x1200 to a whopping 14400x9600 at the same dpi, and it still looks pretty good.

**Helevitia** · 11 May 2003, 21:14

hehe, Wow! I guess I could have tried that. The only part I am worried about now is the picture of the band. I scanned that in from a magazine cover so if you zoom in close you can see the discrepencies. Hmmm...maybe i can find the picture online somewhere. The online pic would definitely have better quality.

Thanks again!f

Dave

**Jon P. Inghram** · 11 May 2003, 21:46

Yeah, you can see the halftoning when blown up 8x. I thought it gave it a interesting look.

**Helevitia** · 11 May 2003, 22:58

Originally posted by Jon P. Inghram
Yeah, you can see the halftoning when blown up 8x. I thought it gave it a interesting look.

"Halftoning", the word I didn't know but was searching for

I thought "discrepency" would work. BTW, did you change your image in the previous post?

Dave

**Jon P. Inghram** · 12 May 2003, 00:08

Yeah, the previous one was zoomed to only 50% by mistake. The new one is zoomed to 110%... I need to go to bed, was aiming at 100%.

az · 12 May 2003, 01:33

You could do the noise trick to the photo (shouldn't do it to the rest of the banner, though).

BTW, is it supposed to be "From The HEART The REAL ****ing Fans" and not "From The Heart of The REAL ****ing Fans"?

AZ

**Maggi** · 12 May 2003, 02:39

Photoshop sux rox for blowing up images ...

seriously, send it over to me ( maggi at opticalart dot de ) and I'll send it back at your desired size.

Reason behind this are the comparable lousy filtering algorhythms that PS offers.

Further for enhanced print quality, you should use for example Freehand and print from there, ie. setup a document that has your banner size, setup apropriate DPIs and position your photoshop picture. Take both docs (Freehand doc and Photshop picture) to your print studio and see how much better it looks then printing directly from Photoshop.

**UtwigMU** · 12 May 2003, 17:22

You could vectorize text and fist graphics (it's about two hours in corel draw/freehand/illustrator) and create shade in desired size.

I recommend adding noise to drop shadow since it has small transition and 8-bit introduces banding (read the 10-bit colour parhelia stuff to know more).

WRT to image, you could inflate it to appropriate size, it's banner anyway.

Maggi, what do you use for upsampling images?