Selection of Designing Paper for Two-ply Ingrain Carpets.
Always observe the proportion existing between the number of warp and filling-threads. For instance, take a carpet having 1072 ends warp (536 ground and 536 filling) per yard, with 30 picks per inch (1 pick ground and 1 pick filling, or 15 pair). Then, 1072 ÷ 36 = 29-28/36 ends of warp per inch. The proposition is as 29-28/36: 30; or, what is practically the same, 30: 30, showing that the paper must be equally divided, and 8 × 8 may be used, as is usually done.
Again, take a carpet having 832 ends warp (416 ground, 416 figure) per yard with 20 picks per inch (1 pick ground, 1 pick figure, or 10 pair). Then 832 ÷ 36 = 23-4/36, and the proportion is as 23-1/9: 20, or as 7-19/27: 6-2/3, practically 8: 7; and 8 × 7 paper may be used.
Note.—It will always be advantageous for the card stamping if the designing paper be selected so that the number of warp-ends in one square equals the number of griffe-bars used in the Jacquard machine.
Selection of the Proper Brush for the Different □ Designing Papers.
The brush used by the designer must be clipped according to the size of the rectangles of the paper. It should cover the rectangle in warp direction at one sweep of the hand; hence each size of the squared paper requires a specially prepared brush for quick, good, and perfect work.
Colors used For Painting Textile Designs.
For this purpose take common colors (in powder), and mix with water and mucilage to avoid rubbing off after application. Use no more mucilage than necessary, as too much will be followed by slow and imperfect work. Colors mixed in this manner must be kept moist by adding a few drops of water daily. The colors most generally used for painting textile designs are:
Vermilion.
Lamp Black.
White Lead.
Emerald Green.
Chrome Yellow.
Burnt Umber.
Cobalt Blue.
Carmine, etc.
A few drops of alcohol will greatly assist the mixing of vermilion, umber, and similar colors which have no affinity for water. Chloride of lime is used on colors having a vegetable basis (as carmine, etc.,) for correcting imperfections, applying weaves or changes in the colored part of a design.