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The Workwoman's Guide. A Lady. 1840. pp. 229
No. 71
TO MAKE CLOTH WATERPROOF.
Take half an ounce of isenglass (Russian is best), put it into one pound of rain water, and boil until dissolved; take one ounce of alum, put it into two pounds of water, and boil till it is dissolved; take a quarter of an ounce of white soap, with one pound of rain water, and boil till it is dissolved. After each of these ingredients has been seperately dissolved, strain them seperately through a piece of linen; afterwards mix them well together in a pot, put it on the fire again till it simmers, then take it off, and while thus near boiling, dip a brush into it, and apply it to the wrong side of the cloth intended to be waterproof.
The cloth must be spread out on a table during the operation, and remain there until it is dry; after it is dry it must be brushed on the wrong side against the grain; and then dipping the brush into clear water, pass it lightly over, and leave it again to dry.
After the, the gloss caused by the application of the ingredients can be taken off.
Three days after the operation has been done, the cloth will be imperious to water, but not to air.
TO MAKE CLOTH WATERPROOF.
Take half an ounce of isenglass (Russian is best), put it into one pound of rain water, and boil until dissolved; take one ounce of alum, put it into two pounds of water, and boil till it is dissolved; take a quarter of an ounce of white soap, with one pound of rain water, and boil till it is dissolved. After each of these ingredients has been seperately dissolved, strain them seperately through a piece of linen; afterwards mix them well together in a pot, put it on the fire again till it simmers, then take it off, and while thus near boiling, dip a brush into it, and apply it to the wrong side of the cloth intended to be waterproof.
The cloth must be spread out on a table during the operation, and remain there until it is dry; after it is dry it must be brushed on the wrong side against the grain; and then dipping the brush into clear water, pass it lightly over, and leave it again to dry.
After the, the gloss caused by the application of the ingredients can be taken off.
Three days after the operation has been done, the cloth will be imperious to water, but not to air.