To Renovate Straw Hats.
II.—Sponge the straw with a solution of
| By weight | |
|---|---|
| Sodium hyposulphite | 10 parts |
| Glycerine | 5 parts |
| Alcohol | 10 parts |
| Water | 75 parts |
Lay aside in a damp place for 24 hours and then apply
| By weight | |
|---|---|
| Citric acid | 2 parts |
| Alcohol | 10 parts |
| Water | 90 parts |
Press with a moderately hot iron, after stiffening with weak gum water, if necessary.
III.—If the hat has become much darkened in tint by wear the fumes of burning sulphur may be employed. The material should be first cleaned by thoroughly sponging with an aqueous solution of potassium carbonate, followed by a similar application of water, and it is then suspended over the sulphur fumes. These are generated by placing in a metal or earthen dish, so mounted as to keep the heat from setting fire to anything beneath, some brimstone (roll sulphur), and sprinkling over it some live coals to start combustion. The operation is conducted in a deep box or barrel, the dish of burning sulphur being placed at the bottom, and the article to be bleached being suspended from a string stretched across the top. A cover not fitting so tightly as to exclude all air is placed over it, and the apparatus allowed to stand for a few hours.
Hats so treated will require to be stiffened by the application of a little gum water, and pressed on a block with a hot iron to bring them back into shape.
Waterproof Stiffening For Straw Hats.
| I.— | Copal | 450 parts |
|---|---|---|
| Sandarac | 75 parts | |
| Venice turpentine | 40 parts | |
| Castor oil | 5 parts | |
| Alcohol | 800 parts | |
| II.— | Shellac | 500 parts |
| Sandarac | 175 parts | |
| Venice turpentine | 50 parts | |
| Castor oil | 15 parts | |
| Alcohol | 2,000 parts | |
| III.— | Shellac | 750 parts |
| Rosin | 150 parts | |
| Venice turpentine | 150 parts | |
| Castor oil | 20 parts | |
| Alcohol | 2,500 parts |