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The 10 notes for film checking
1. Check the completeness of required information
A. Information of layout/word/color/dimension(drawing)
B. Design/plate making(modifying)
C. Film test table
D. Carton box/ trademark card
2. Whether each film is clean
3. Whether the film has scratches
4. Whether there is a lack of Corner mark
5. Whether the page and word are correct
6. Corner marks and accuracy of overprint of the color plate
7. Whether the figure is complete
8. Correctness of the dimension
9. Whether it bleeds
10. Whether there is color separation error in each color plate
11. Whether the grip position and places around film have: Product name (and output lot number), dimension, color batch, output date, producer code, color correction stripe.
Large printed sheets are first folded to form signatures. A signature is a single sheet of paper folded to a certain number of pages. For example, one signature may yield 8, 16, or 32 individual pages when it is trimmed on three sides later in the binding process.
Two endsheets musts also be folded for each book. An endsheet is a strong piece of paper that has been folded in half to make four pages. The size of each folded endsheet is the same as the book's signatures.
Endsheets are glued to the front of the first signature and to the back of the last signature. This process is called tipping and should be done after the signatures have been gathered and sewn.
GATHERING SIGNATURES. Assembling signatures in proper sequence for binding is called gathering. Gathering signatures can be done by hand or with a gathering machine. The basic operation of a swing arm gathering machine is shown in Fingure 10-20.
