1. Chapter 4 Drafting Media and Reproduction Methods

2. Introduction Manual drawings –Prepared on precut drafting sheets Contain printed graphic designs for company logo and information, borders, and title blocks Computer-aided drawings –Created using a template Contains a border, title block, and graphic designs for the company Stored in files and reproduced on media

3. Paper and Films Factors influencing choice and use of manual drafting media: –Durability –Smoothness –Erasability –Dimensional stability –Transparency –Cost

4. Paper and Films (cont’d.) Vellum –Drafting paper specially designed to accept pencil or ink Lead on vellum is the most common combination –Least expensive –Good smoothness and durability Not as durable or stable as some materials

5. Paper and Films (cont’d.) Polyester film (trade name Mylar) –Plastic manual drafting material –More expensive than vellum –Excellent durability, erasability, dimensional stability, and transparency –Drawing is best accomplished using ink or special polyester leads

6. Paper and Films (cont’d.) Polyester film (cont’d.) –Single- or double-matte surface Matte is a surface texture that is not glossy Manual drafting is done on a matte surface Double-matte has texture on both sides Single-matte has a matte surface on one side and a slick surface on the other

7. Title Blocks and Borders Identifies the company that has made the drawings Placed along the right side of the sheet Borders are thick lines that surround the entire drawing Zoning

8. Title Block Information Sheet Number Company Information Project or Client Drawing Name Address Scale Date Drawn by Checked by Architect or Designer Revisions

9. Sheet Sizes, Sheet Format, Title Blocks, and Borders

10. Media Types & Sizes Grid Paper Vellum Bond Roll Sheet sizes recommended by ANSI for Printers A8 1/2 X 11 B17 X 11 C22 X 17 D34 X 22 E44 X 34 F40 X 28 Architectural Sheet sizes for plotters Arch A 9 × 12 Arch B 12 × 18 Arch C 18 × 24 Arch D 24 × 36 Arch E 36 × 48

11. How to Fold Prints

12. Reprographics Diazo commonly known as “blue-prints” (Demo) Ultraviolet light passes through a translucent drawing to expose chemically coated paper Less expensive and less time-consuming No longer cost effective –Red stamped plans from engineer –Electronic submission in Salt Lake County