Photoshop CS3 for Screen Printers- P15

Photoshop CS3 for Screen Printers- P15: The toolbox is the heart of Photoshop CS3, and where you’ll find thetools you need to create your artwork and perform editing tasks. Fromthe toolbox you can access the selection tools, shape tools, type tools,Crop tool, and eraser tools. These are basic tools that any screen printeror graphic artist needs.
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Photoshop CS3 for Screen Printers- P15396 Part IV / More Tools 2. Choose Layer>Add Layer Mask>Reveal All to reveal the entire layer or Layer>Add Layer Mask>Hide All to hide the entire layer. To create a layer mask that hides or reveals a selection only: 1. Select the layer to which you want to add the mask in the Layers palette. 2. Make the selection for the mask using a selection tool. 3. Choose Layer>Add Layer Mask and either Reveal Selection or Hide Selection. Only the selection will be hidden or shown, and this selection can be edited independently of the other parts of the image. To work with layer masks that have been created: 1. Select the layer in the Layers palette that contains the mask you wish to edit. Click once on the layer mask thumbnail to make it active. 2. Select an editing or painting tool. 3. Paint with white to subtract from the image, black to add to it, and gray to partially hide the layer. You can switch to using the fore- ground and background colors in the toolbox and revert to the original black and white there too. 4. When complete, you can either apply or discard the mask by holding down the Shift key and clicking once on the mask in the Layers pal- ette. A red X indicates that the mask is discarded. Using layer masks allows you to separate and control specific parts of an image by producing a stencil of a selection. This stencil can be altered but the area around it is protected from change. These selections can then be saved for later use by saving the mask in an alpha channel. This is briefly detailed next. A Little about Alpha Channels You can save a selection as an alpha channel mask. Saving the selection as a mask will allow you to keep your work for later use. Alpha channels are storage areas for data, like selections. When a selection is saved as a mask, this channel is created automatically. Chapter 21 / Pens, Paths, and Masks 397 You can also save a selection manually. First, open the Channels palette using Window>Channels. With the selection active in the image, choose the Save selection as channel icon at the bottom of the Channels palette. A new channel called Alpha 1 appears, which can be renamed. These alpha channels can be deleted, added, and edited using the painting and editing tools, and opacity and other mask options can be set. Alpha channels can also be converted to spot color channels for spot color separations. Once the mask has been saved as a channel, you can paint with white to erase part of the mask, black to add to the mask, or gray to apply opac- ity to the mask. There is more on alpha channels in the next chapter, “Spot Color Separations.”Summary In this chapter you learned a little about paths and how to draw curves as well as straight lines. To create paths, you used the pen tools. You learned to fill and stroke paths and how to save them for later use. You learned that paths can be useful for tracing around objects that would be harder to deal with using other tools, and that paths can be saved as selections for various other applications and purposes. Vector masks and layer masks were also introduced. These can be used to control what parts of a layer will be hidden or revealed. The masks can have special effects applied or they can be inverted for more effect and usefulness. Paths, layer masks, and vector masks are a quite powerful and complex feature of Photoshop. This chapter introduced only the basics, but with this knowledge you are well on your way to uncover- ing the magnificent power of these tools.This page intentionally left blank.Part V Color Separations 399This page intentionally left blank.Chapter 22 Spot Color Separations Of all of the types of color separations that you can perform in Photoshop, spot color separations are the easiest. You’ll use spot color separations when there are only a few colors in the artwork and those colors are distinct. Spot color artwork usually contains 12 or fewer dis- tinct colors. The fewer the better though, since each color must be chosen and separated manually. Spot color separations where the colors fade into one another or have highlights or shading must be printed with halftones output by a PostScript printer. True spot color images, those whose colors are few and distinct and do not fade into one another or have highlights, can be printed using an inkjet or laser printer and film or vellum without half- tones. If you print T-shirts using a four- or six-station press to print true spot color, remember that you can print only as many colors as you have stations on the press. Besides allowing you to color separate different types of spot color images, Photoshop also makes it easy to create spot color artwork, thus allowing you more options when creating artwork for clients. Creating your own artwork for clients can be both profitable and rewarding and can help you expand your business by allowing you the ability to offer art services. 401402 Part V / Color SeparationsBuilding Your Own Design Photoshop makes it easy to create your own design from hand-drawn line art. If you have line art that you’ve drawn or artwork that a client has drawn, you can scan an image as line art at 600 dpi and fill the areas of the image with the color. As detailed in previous chapters, the Paint Bucket can be used to fill any area with color, brushes can be used to add ...