Details:
Summary:
Quality control of paper printing is expensive, and it is exceeded in cost by the process of origination, platemaking, make-ready and materials. All too often the first sign of a problem occurs when the press begins to produce printed copies and a condition of misregister or even creasing is encountered. Measurement, communication, and understanding have been successful in dramatically reducing these problems. The theory of E.R.H. and moisture condition in paper will be covered with the aid of slides and diagrams and it will be shown that moisture content, while being a valuable economic factor of paper making, has little bearing as a performance specification for printers and convertors. Some reasons given for not applying R.H. techniques to paper and printing have been the near absence of definitive standards for R.H. While your own National Bureau of Standards have operated for many years and continue the only traceable standard for R.H., there are many tables giving different results to the salt secondary standards. Some reasons given for not applying R.H. techniques to paper and printing have been the near absence of definitive standards for R.H. While your own National Bureau of Standards have operated for many years and continue the only traceable standard for R.H., there are many tables giving different results to the salt secondary standards. The National Physical Laboratory, Teddington will launch at the Moisture and Humidity symposium in Washington, DC, on April 14, 1985, the new National Standard for the United Kingdom. Brief details of the new Standard will be given together with its relevance to the user. A range of measurement equipment will be described together with application details and measurement techniques. Slides will be used to support the presentation.