Quality Control Devices. P274-291 Insert 7-8. Pro.Dr.Cao Congjun Xi’an university of Technology. 测控条的测控原理. 测控条 (Quality control strip/target) ：由网点、实地、线条等测标组成的用于判断和控制拷贝、晒版、打样和印刷时信息转移状况的软片条。. 1. 网点面积的扩大与网点边缘长度总和成正比。. 线数高时，总边长大，网点扩大值越大。 用于检测网点扩大值。 e.g. Brunner 50% 粗网和 50% 细网 / GATF 字码信号条.
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Quality Control Devices
Xi’an university of Technology
e.g. Brunner 50%粗网和50%细网/ GATF字码信号条
e.g. Brunner 50%细网段的折线
GATF-the Graphic Arts Technical Foundation
The GATF T-Mark consists of a configuration of thin, accurately ruled lines that are used to identify image centers, folds, trims, and bleeds during printing production (figure 12.16).
The GATF Star Target is a small, circular pattern of solid and clear pie-shaped wedges (figure 12.17).
When printed on a press sheet,the Star Target gives the press operator a quick and effective measure of ink spread,slur,and doubling (figure 12.18).
Doubling:Printing of a double image, which consists of a full solid and a weak second image slightly out of register with the full solid.
The GATF Dot Gain Scale is designed to give numerical values to any dot sharpening or dot gain,The scale is made up of ten 200-line screen tint steps which are graduated in density. These steps form numbers from 0 to 9 on a uniform background of 65-line tint density.
Color Control Bar
Color Reproduction Guides
Gray Balance Chart
Ink Coverage Chart
Print test form
Print test form
Ink Trapping Target
Gray balance Target
Color Bar & Solid Strip