Substituting as in formula 12—
| 28 × 48 × 200 × 1·75 | |
| = 42 lb. weight. | |
| 20 × 560 |
Example 15.—Calculate the weight of fleecy fabric worked one thread 2/30's worsted yarn on face with 12 skeins yarn on back; the worsted has a take-up of 1·75, whilst the back yarn take-up is 2. There are 24 courses per inch of each thread, the length is 150 yd. and the width equivalent to 60 in.
For this example it is most expeditious to work out each yarn separately according to formula 12. For the face yarn the items will be stated thus—
| 24 × 60 × 150 × 1·75 | |
| = 45 lb. weight, | |
| 15 × 560 |
for the woollen—
| 24 × 60 × 150 × 2 | |
| = 140·6 lb. woollen. | |
| 12 × 256 |
These added give 45 + 140·6 = 185·6 for the total weight in pounds.
Example 16.—Find the weight of a fabric plated as follows—
1-40/2 spun silk with take-up of 1·75