FILE FORMAT GUIDELINE     #     GUIDE TO IMAGE RESOLUTION     #     FILE PREPARATION CHECKLIST     #   

STANDARD POSTER SIZES   #

Design

When presenting your company's logo to potential customers, you can't afford to have it reproduced incorrectly. Faulty reproduction of your logo could cost you time, money, potential customers, even your reputation.

At DPI Signs we understand the time it takes to build your company's image and profile. With the utmost attention to detail, we will reproduce your corporate logo or graphic. Allow us the opportunity to transform your logo into an eye catching, custom graphic and signage to professionally communicate your message to the world.

We also offer the service of doing the graphic design for you. We charge R250/hour for design time. We have the experience in doing the design of thousands of posters, signs, and trade show displays. We also have the ability to scan photos at high resolution.

Consult with DPI Signs to learn how to best prepare your own files for precise reproduction.

FILE FORMAT GUIDE

 Print-ready files are accepted in the following formats:

.ai, - Adobe Illustrator drawing or vector graphics file

.eps - Encapsulated postscript image file created using Adobe Illustrator; designed for high resolution printing of illustrations; standard file format for importing and exporting PostScript files

.cdr - Corel Draw Vector drawing file

.tiff - Tag Image File Format; preferred bitmap graphics format for high-resolution postscript printing

.jpg or .jpeg - standard format for photographic image compression developed by the Joint Photographic Experts Group

.psd - Bitmap file created using Adobe Photoshop

.pdf - Portable Document File from Adobe Acrobat

.fh11 – Macromedia Freehand

Quick Facts about Bitmap Images

Bitmap images are made up of colored dots (pixels) in a grid

Also known as raster images

Resolution dependent – resizing affects image quality

Scanned images and digital photos are bitmaps

Quick Facts about Vector Images

Vector Images are made up of individual objects composed of lines and shapes with different attributes such as color.

Resolution Independent – scaling images does not affect quality

Smaller file size

Not suitable for photo-realistic reproduction

Fonts are vector objects

GUIDE TO IMAGE RESOLUTION

Resolution refers to the number of colored dots or pixels that make up an image. 
It is commonly expressed in dpi or dots per inch.

Resolution Rules:

·         The higher the dpi, the greater the resolution, the better the image quality. But don’t go overboard. Higher resolution images create larger file size.

·         Image resolution is directly and inversely proportional to an image’s physical size. When you increase the resolution of an image, reduce its size. When you enlarge an image, lower the resolution. Otherwise, the image will print poorly.

  • For printed images, the ideal resolution is 300 dpi for images and 400 dpi for text at the final printed size.

More Helpful Tips:

·         Your screen resolution doesn’t accurately reflect your image resolution because monitor displays usually have about 72 to 116 ppi. To view print resolution of your image, zoom in up to 300-400%.

·         When taking pictures from a digital camera for your print project, it’s best to set your camera to the highest resolution setting.

·         Four-Color Process Printing uses the CMYK color mode. Convert RGB images to CMYK using graphics editing software such as Adobe Photoshop.

  • Save your images in a lossless file format such as .tif and .eps to maintain accuracy and quality.

 

FILE PREPARATION CHECKLIST

Please follow this guide to reduce potential problems, avoid additional costs and speed up production and delivery 

1. SCAN/SAVE

Scanning resolution is usually twice the output line screen. A resolution of 300 dpi or close is ideal when scanning color and grey scale materials. B/W art should be scanned not higher than 600 dpi. Text should be at 400 dpi.  Always scan at 100% of the final size of your document.

2. COLOR MODES

No RGB images. RGB is used for viewing images on a monitor. Please convert to and save all your images in CMYK mode. Your images will not output properly if your files are not set up in CMYK.

3. PROOFREAD

Please spell-check your document and review all other information carefully before submitting your files to us to ensure accuracy.

4. IMAGE FILES

·         Please submit all image and graphic files used in your document

·         Include the original copies of each graphic file.

·         Include all supporting files used in the document

·         Send the linked file of “placed images” in Macromedia Freehand

·         Do not embed image files into your layout

5. FONTS

Please submit your files with all the necessary fonts included – both screen & printer fonts used in your document.

6. PRINT GUIDE

Please send us a mock-up or dummy of your job to serve as a guide.

7.  CONTACT INFORMATION

All files and medium sent to us should have client’s complete name and contact information.

 

STANDARD POSTER SIZES

A4 – 210x297mm

A3 – 297x420mm

A2 – 420x594mm

A1 – 594x841mm

A0 – 841x1189mm

                

 

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