Use of Different Stocks and Colors
The use of upper and lower fillings also allows for the use of different grades of stock in either shuttle. Colors may be used to match the face warps while white may be carried in the lower shuttle to match the back. Silk or other expensive stock may be used for the face without changing the character of the stock used for the back of the goods, which is not practicable in single shuttle work.
All this of course makes it possible to reduce the cost, making this the most economical web produced. In the making of shoe goring, a considerable quantity of which is still used for inserts for house slippers, this is a very popular form of weaving, allowing for the production of a face having a velvet-like pile of the color to match the shoe leather, while the back may be perfectly plain and white.
It is a method employed in combination with the jacquard, where fancy figures may be obtained on the face, using the cam movement for the back, binder and edge, the weave of which is the same for all of these warps, being simply a one up and one down. In such a combination the labor on the jacquard movement is much reduced, inasmuch as the travel of the lingo is much shorter than is required when made in connection with single shuttle.