Specific operations, they should first make a positive bottom plate, Custom Flags For Boats
proofing will seal sensitive adhesive (film), the graphical part of the shading,Mini Flags Wholesale exposure sensitive adhesive (film) does not undergo chemical changes, the light transmission part of the sensitive adhesive ( film) crosslinked hardening, and then rinse with developer, not fat light-sensitive adhesive part (membrane) was washed away by the light sensitive adhesive (film) survived to form a stencil film.
Positive bottom plate and the original black and white, shades of light and shade is the same, if the opposite is called Negative. In principle a positive image plate, also sometimes use the Negative.
Plate studio semi-anechoic chamber, and therefore can be used to brownish yellow or red light as a light source, the brightness of light can clearly see objects is appropriate.
Photosensitive plate method over the direct method, Small Flags Wholesale indirect method, Custom Flags For Boats between the direct method three kinds Essentially, the technical requirements of the three plate method is the same, just different sensitive adhesive coating or film process, because these three ways is the most commonly used light-sensitive plate method, for these three methods, respectively, to be introduced (Figure 2-109).
Figure 2-109 photosensitive plate type of law
(a) characteristics. Is a most widely used method, the plate method is the direct coating of photosensitive liquid formed on the photosensitive film, the photosensitive material of low-cost and simple process. Antenna Flags Wholesale This coating operations have been replaced by recent automatic coating, but in order to smooth and uniform coating photographic emulsions are still inseparable from the technology of the operating personnel. In addition, the disadvantages of this method is coated, dry and need to be repeated to get the required thickness, coating, drying time, direct legal version of process shown in Figure 2-110.
Figure 2-110 direct legal version process
Direct method of photographic film coating
a) pre-treatment. In order to prevent dirt, dust, grease, etc. Custom Flags For Boats to bring the photographic film shrinkage, trachoma, and image break phenomena during the coating of the photosensitive liquid before it is necessary to use dishwashing liquid, washing their nets full. Used in cleaning agents commonly used neutral or weak alkaline detergent to the family, but the market for the sale of dishwashing liquid, commonly used such as 20% caustic soda aqueous solution, degreasing effect and can improve the light-sensitive liquid on the wettability, can be very uniform coating film, so the effect of such cleaning agents very well. Wash operation from manual to automatic washing machine (the most commonly used gun, ultrasonic wash), Custom Flags For Boats the way are many and varied. Bicycle Flag Holder Whatever the method, go through the wash liquid degreasing wash, washing, dewatering, drying and other processes.