Bitmaps only contain black and white pixels to make up an image with no shades of grey. Bitmaps are very compact but can still contain very high resolution. For our projects, our bitmaps are to be saved as EPS, and they must be strictly line art and no shading.
Image source: http://www.clipartlab.com/flowers.php
A reverse is when you create art that allows the color of the paper to show through.
Vector art is art that is not resolution dependent. You can scale vectors up or down to whatever size you want without affecting the image quality. The file format for vectors are AI files, created in Adobe Illustrator.
A grayscale raster is a raster image in grayscale mode. You can change the mode in Photoshop. It should be saved as a tif or an eps.
A duotone raster can only be saved as an eps. To create a duotone, you must first convert your image to grayscale to get right of all color information. Then under the same Image>Mode menu, select duotone. You will then be prompted to choose two spot colors to create the duotone. Black plus another color are typically used for duotones.
The colors I used are Black and PANTONE 1645 C.
A silhouette raster is a raster image created using a clipping path. It cannot bleed on all four sides, and it can be saved in grayscale, CMYK, or duotone. You must save this file as an EPS. To create a silhouette/COB image, select the pen tool in Photoshop with your image opened. Draw a path around what you want to "cut out" of the image. Making sure that your path is still selected, save the path in the Paths panel. After you had completed that step, select Create Clipping Path in the same panel and save it as an eps.
A full bleed raster is a raster image with a bleed on all four sides. To create it, you would make it in Photoshop and file formats can include EPS or TIFF. You can have a full bleed raster in any color mode, including duotone, grayscale or CMYK.
A four color raster is a raster image that is saved as a flattened TIFF or EPS, with a color mode of CMYK.
A screen tint is a pattern on the screen that consists of dots that are evenly spaced and the same color to create an even tone.
Sources:
http://www.forbesproducts.com/artworkfaq.aspx
https://pittstate.angellearning.com/section/default.asp?id=12SP-TE-GIT-341-02
McCue, Claudia. Real World Print Production with Adobe Creative Suite Applications. Berkeley, CA: Peachpit, 2009. Print.
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