數位印刷 0924

0924
近代印刷工業革命
第一次 DTP Printert, editing S/W, and Personal Computer
第二次 CTP (Computer-to-Film), CTP (Computer-to-Plate and Computer-to-Press)
第三次 Digital Printing (Technologies up Dramatically)

[[Major Component in CTP -RIP]] 光札影像處理器.....XD 解譯器啦
1. RIP (Raster Image Processor)
Software RIP
Hardware RIP
2. Computer (CPU)
3. RAM
4. Platforms(OS)
5. Laser Heads
6. Ethernet (Networking)對內的封閉式網路
7. Ripping and Imaging

postscript程式語言....

[[CTF (Computer-to-Film)]]
1. Also called: Imagesetter 底片輸出機
2. Size A3 -> A2 -> A1
3. Resolution 解析度
4. Imposition 拼大版
5. Automation 自動化
6. Screening 網點 (AM網點大小一樣, FM網點大小不一樣random落點 , Hybrid折衷)
7. LPI (Line-Per-Inch)

階調層次＝(dpi/lpi)^2

報紙用100、120線
比較高階的印刷品用200線
雜誌用175線

CTF2
1. On-Line or Off-Line Processing (Film Processor暗房作業)
2. Laser Headers (One or More)
3. Internal Drum 內滾式滾筒 vs. External Drum 外滾式滾筒
4. Computer-to-Paper Plate (Line Art Only) 線條稿
5. Negative vs. Positive Images on Film 陰/陽片型晒版
6. Precision 精準度

Avanxis IV 美式紙張，比A4大一點點
1. 4-up, imagesetter with visible red laser diode (635mm)
2. Handle sized: up to 254x609 mm or 10" x24"
3. Resolutions: from 1,000 to 3,000 dpi
4. Exposure size: up to 556 mm or 21.8“

Avanxis VIII
1. 8-up, external drum imagesetter with LED (660 nm)
2. Handles sizes: up to 838 x 1,145 mm or 33 " x 45"
3. Resolutions: from 1,200 to 4,000 dpi
4. Exposure size: up to 810 x 1120 mm or 31.9" x 44"
5. Example: Agfa's CTF

Copy dot 專門掃描底片，把CMYK四種底片掃描起來還原成數位檔案
also 轉換 screen angel

CTP (Computer-to-Plate) 留版比較容易，壽命比較長
1. Also called: Platesetter 印版輸出機、電腦直接出版機
2. Same as CTF
3. Laser Heads
4. Laser Frequency (Energy) with Different Laser Technology
5. Automation vs. Manual