Shake out each piece thoroughly; fasten to a clothes-line or hang on a rack to allow the moisture to evaporate. This should be out-of-doors in the sunlight if possible.
REMOVAL OF STAINS
Foreign matter which is difficult or impossible to remove by the ordinary washing process is called a stain. Such matter is not dissolved by the usual cleansing agents used in laundry work, such as water and soap, but requires some special solvent to act on it. The choice of the agent to be used will depend on the nature of the foreign matter to be removed. In some cases it is difficult to find an agent which will not act also on the colour of the fabric; in other cases to find one which does not injure the fibre of the goods.
The pupils should be asked to give instances from their own experience where special solvents were used to remove stains, and be required to make a list of these. If necessary, the teacher should supplement this list with the names of other agents and the methods of using them.
OUTLINE OF LESSONS ON THE WASHING OF WOOLLENS
The washing of woollen materials is part of the Course for the work of the Senior Grade of Form IV, but, for the sake of convenience, the laundry lessons of both Grades of Form IV are outlined in one section of this Manual.
Before allowing the class any practice in this branch of laundry work, it will be necessary for the teacher to make certain principles very clear:
1. That wool is an animal product. As such it tends to be shrunken and hardened by (1) heat, (2) alkalies.
2. That the surface of each wool fibre woven into woollen materials is seen under the microscope to be covered with notches, or scales. If these notches in any way become entangled, the material is thereby drawn up, or "shrunken".
3. That these notches may be entangled by: