浅谈ps版显影（Brief discussion on PS version development）.docVIP

浅谈ps版显影（Brief discussion on PS version development） Brief discussion on PS version development PS version development Development is the key to plate making, affecting the quality and stability of final plate making. Many plate making problems often appear here. Developing principle The developing process is used to dissolve the photosensitive layer (positive image, PS plate) that has been exposed and decomposed, so that the printing plate forms two parts of image and non image, and is called developing. The developing principle: PS version after exposure of photosensitive resin decomposition, nitrogen release, caused by ring cracking, molecular structure rearrangement, generating indone compounds, water generation indene acid compound, the compound alkali is generated and salt soluble in water, bare aluminum base, formed without a blank area of the image, these the formation of regional natural hydrophilic, but not sensitive parts retained the original characteristics of the lipophilic photosensitive resin, naturally formed part of the image printing plate, printing ink can be accepted. Developer solution The developer is an alkaline aqueous solution consisting of developer, protective agent, wetting agent, and water. Developer Is used to dissolve the light has been part of the photosensitive layer of substances, mainly alkaline substances, commonly used drugs are sodium hydroxide, potassium hydroxide, sodium silicate, sodium phosphate and so on. A. sodium hydroxide Belong to alkali, has the characteristics of strong ability of developing, developing fast, cheap price, but it does not have the photosensitive coating on certain erosion, thismakes film remaining rate, also can make the blank aluminum base film after developing the infringement. Therefore, the use of sodium hydroxide as a developer should pay attention to the following principles: PS version commonly used for thicker film and for sealing treatment. Commonly used in photosensitive layer, alkali resista