Calculation for Figure Distribution
In this type of figuring, calculation must be made to distribute the figure uniformly so as to get a well balanced flat effect of the web. As already stated, wherever the filling is shown, all the face stock at these points is buried between the upper and the lower cloths, and is acting as filler or gut in these places, preventing contraction. Should heavy blocks be thus designed, the web would pucker up in an unseemly manner. The filling used should be soft and uniformly spun, so that it will mass well together and in a great measure prevent the buried face stock from pricking through.
In designing webs of this character, calculations have to be made from the web after it is woven and finished, otherwise the design may be out of the desired proportion. A web may have 60 picks per inch on the breast plate while weaving, but when contraction has taken place after going through the press, it may have shrunk as much as 50 per cent. The steaming and finishing process may further contract it another 10 per cent. which might make the picks about 100 per inch. Of these only one-half appear on the face and the other half on the back. Therefore 50 picks per inch will be the proportion in which the design should be made, and paper scaled according must be used.