Hello I have this problem in CS5 that any type of image or line art are always blurry. All my work is for print and perhaps just the preview is blurry but I am afraid that printing will be bad.
Most graphics I bring in are from Photoshop CS5. I make sure they are 300DPI to start and recently learned they should not be in RGB mode but CMYK.
The images I should also mention when placed are very small and I have to scale them to be the correct size. I do not know why they do not place as their original size. So basically it is small size and blurriness.
Any help regarding this matter is appreciative. I am new at Illustrator and want to learn more from it since it seems like a great tool to use for printing.
I believe the solution to your problem starts in photoshop. Most printers require resolution to be 2X the lpi (lines per inch) and the most common line screen is 150 lpi (133 or 175 are the next most common), so hence 300 dpi (dots per inch) standard resolution requirement. Open your image in photoshop >> Image >> image size >> uncheck resample image >> change your resolution to 300 dpi if it is not and save. I bolded that cause thath setting is very important, and you will need to become intimately familiar with hwo everthing in image size works. This unchecking will not add or remove pixels, but will adjust the size of your image if you change to 300 dpi.
Now when you place the imahe in ilustrator, you will know that your image is exactly 300 dpi. If you scale your image smaller, no problem your effective resolution will be >300dpi adn that never hurts. If you scale your image larger in Illustrator, then you know that your resolution will be less than 300 dpi. You can now better assess the quality of your image reproduction.
Yes ofcourse, just make sure you uncheck resample image before clicking on OK. You will notice no delay when you hit ok, because this is a very easy task for Photohsop and pixels are not being resampled.
There are times when you will may want to resample(but that is antoher topic), and you will notice some processing time after hitting ok, the higher res image the more processing.
Thanks for all your help. Did not know about the control bar. I just looked and all images are under 300 PPI. Some high 200's and others low 100's. Does this mean these images are not at 300DPI?
It means that the images will print with the ppi reported on the control bar. The original images themselves outside of Illustrator may be different ppi if you scale them in Illustrator. To understand this, just experiment with scaling an image up or down and check how the ppi on the control bar are affected. Think of the resolution as number of pixels per side divided by the unit of measure (it is inches when reported as ppi (pixels per inch). Scaling the image smaller in Illustrator, lets more pixels from the original image to fit in a physical unit of measure (inch in this case) resulting in more detailed and sharper images and vice versa.
Basically scaling in Illustrator is the same as changing the image size or resolution (ppi) in Photoshop with the "Resample Image" option unchecked. This doesn't change the number of pixels in the image at all but just its physical dimensions. In Photoshop the only difference will be in the ruler showing new physical size.
I have saved all the suggestions and advice and again thanks to all of you. I got the file to be clear and sharp this time. It took a few days but finally it worked!
I do have another question in regards to transparency. It seems illustrator does not like it because I can see an ugly black outline on transparent items I place in the file and then print to a PDF.
The way I resolved this issue was with the guidance above and making the bakground of these pictures the same color of the background in the art board. Now I have the back side I am working on which has a two tone color and I cannot do the background color. I have been trying to match it up but never aligns right. Is there a way to have transparent items work correctly in Ilustrator?
I should mention one final thing. Maybe I am wrong but it seems that in Illustrator you may see things blurry but when it comes to save for printing output everything is clear. I do know that inside InDesign you can change the view to be higher quality.