Increased Sensitivity of the PS Plate - Chemical Increase Method

Since the concept of chemically amplified photoresists was proposed by IBM’s Itengyang in the early 1980’s, photoresists have been widely used to increase the sensitivity, resolution, and film of photoresists. The corrosion resistance of the layer. The negative thermal cross-linked thermal CTP plate proposed by Kodak Company was based on the principle of chemical amplification.

Drawing on the basic principles of chemically amplified resists and the successful experience of Kodak's development of negative thermal cross-linked thermal CTP plates, in recent years, chemically amplified negative plates PS plates have been developed. In the laboratory, Kodak's 2*21 gray ladder ruler is used to expose the black light (output wavelength value is 365 nm). After developing for a specified period of time in the domestic common positive-acting PS plate developer, it is necessary to observe the complete curing section. Exposure time, according to E = IT formula to calculate the exposure as the negative PS version of the sensitivity, found that the sensitivity of this plate is very high, between 20-50mJ/cm2, is a commercial negative PS version so far Rarely reached sensitivity.

Chemical amplification negative PS version PS-N1 and thermal photosensitive dual-use plate CTP-N1, plate material size is 790mm x 586mm, the sensitivity of this type of chemical amplification negative PS plate with different pre-bake temperature after exposure different. Its pre-bake temperature range is between 120-140C. The higher the pre-bake temperature, the higher the sensitivity, and it can reach 20mJ/cm2 at 140C. In addition to the pre-baking temperature, the length of the pre-baking time can also regulate the sensitivity of the PS plate. However, in order to control the plate making speed of 1 plate for 1 minute, the pre-baking time is the longest position of 1 minute, and the shortest position is about 30 seconds. The plate-making speed of newspapers should be as high as possible. The use of chemically-enhanced negative PS plates is undoubtedly an ideal choice.

Non-chemical amplification negative PS version, some well-known PS manufacturers and research institutes around the world have spent a lot of effort on the high-sensitivity of the PS version to carry out research and development, the current highest level can only reach Agfa. N81, domestic research and commercialization of this level of non-chemical amplification negative PS version and commercialization, at least 2 to 3 years. The route of chemical growth was chosen to achieve industrialization and commercialization. CTP-N1 has reached the sensitivity of N81, and the sensitivity of PS-N2 is double that of PS-N1, and it can be industrialized and commercialized at any time.

Formula: E=IT
I is the illuminance (mJ/cm2), measured by an ORC M-01 type illuminance meter; the black light wavelength range is 320-420 nm, the high pressure mercury lamp output wavelength range is 350-450 nm, and T is the exposure time (s).
CTP-N 2 sensitivity may be higher, PS-N1 sensitivity has reached the level of Agfa's N550 and Kodak DirectPrint, the sensitivity of this plate may be further improved, visible, using chemical amplification Negative PS version and negative heat cross-link version are effective ways to improve the plate material, and it is also an important measure for the application of these plates in commercial printing and newspaper printing.

Source: Printing Technology

Eye Shape Lotion Bottle

Eye Shape Lotion Bottle, Glass Lotion Bottle, Plastic Lotion Bottles

SHANGYU SUNRISE PACKAGING CO.,LTD , http://www.cosmetic-package.com