Meters -30cmx5m Photosensitive Dry Film For PCB Circuit Board Production Photoresist Sheet Highlights Generic Brand 30cmx5m Photosensitive Dry Film For PCB Circuit Board Production Photoresist Sheet Description: Photographic film, also known as dry film, is used to make circuit boards; stick it on the PCB, it will become a sensitive circuit board. Suitable for plating, hole covering and engraving process. Excellent ability to cover holes High resolution Excellent adhesion to almost any surface Image clarity after exposure Front panel is very clean after developed Size: approx. 0.3x 5m / 11.81x 196.85inch Color: As pictures show Specification: How to use: 1. Clean your board. Cut the dry film a little larger than your board. 2. Apply Resist: This photosensitive varnish is composed of 3 layers. The upper and lower layers constitute a transparent protective layer. Therefore, at first you need to remove a protective layer. For this, just use two small pieces of . Then apply the middle coat on edge. 3. Expose: Place your negative artwork over the remaining protective layer. 4. Develop: Remember: you need a NEGATIVE film developer. Remove the remaining protective layer from the film. After 3 minutes, remove the card from the developer and hold it under running water to check. You can always put it back in the developer if you need more time. Etching: Dry film is resistant to most acid etching solution, PH value can be resistant to most alkaline etching solution between PH8.0-8.5. Cover Hole: A 1.5 mil dry film can completely cover a 0.25 inch thick hole. Plating: Dry film is available in the most common use of plating bath, no wrinkles, no color. Package Include: 1 Roll Photosensitive Dry Film Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.