Transcription of Printed Circuit Materials Riston and Stouffer …
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Printed Circuit Materials Riston and Stouffer …
Technical Data m DuPont Photopolymer & Electronic Materials Printed Circuit Materials Riston and Stouffer Density Tablets Photopolymer Film Technical Bulletin TB-9526. DESCRIPTION. The Riston 25-Step Density Tablet (step tablet) is a strip of MYLAR polyester film containing 25 OPTICAL DENSITY: numbered blocks (steps) of increasing optical den- PERCENT LIGHT TRANSMITTED. sity. It is used to measure the degree of polymeriza- tion of DuPont Riston photopolymer films from 90%. exposure to ultraviolet (UV) light in the imaging step 80%.
1 TB-9526 (07/98) Rev. 2.0 Step tablets are made so that each step increases in optical density by a specific amount. As the step number increases, the …
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