second time, leave the three-sixteenth-inch washer
under the can base and reflanging base.

Resealing the Second Time. Remove reflanging base and put the second
three-sixteenth-inch washer under the standard can base and proceed as
directed under resealing.

THE SOLDERING OUTFIT

The soldering equipment required includes a capping iron, a tipping
copper, soldering flux, a small brush, a porcelain, glass or stoneware
cup in which to keep the soldering flux: sal ammoniac, a few scraps of
zinc, solder, a soft brick and a file.

Soldering Flux. Soldering flux is a solution of zinc in crude
muriatic acid. It is used for cleaning the irons and for brushing the
tins and lead surfaces so as to make it possible for the melted lead
to adhere to the tin.

To Make the Flux. Purchase at the drug store ten cents' worth of
crude muriatic acid. Place this in a porcelain, stone or glass jar.
Add as much zinc in small pieces as the acid will thoroughly dissolve.
The flux is always best when it has stood from twelve to sixteen hours
before using. Strain through a piece of cloth or muslin. Dilute with a
little water, about half and half. This will make the soldering flux.
When using keep the flux well mixed and free from dust and dirt.

Tinning Capping Iron. Purchase five or ten cents worth of sal
ammoniac at the drug store; clean iron with file or knife. Mix a
little solder with the sal ammoniac. Heat the capping iron hot enough
so that it will melt the solder and convert it into a liquid. Place
the iron in the vessel containing the mixture of sal ammoniac and
solder. Rotate iron in the mixture until the soldering edge of the
iron has become bright or thoroughly covered with the solder. All
particles of smudge, burned material, and so forth, should be removed
from the iron before tinning.

Tinning the Tipping Copper. The tipping copper is tinned in very
much the same way as the iron. Sometimes it is desirable to file the
tipping copper a bit so as to make it smooth and to correct the point.
Heat the copper and rotate the tip of it in the mixture of sal
ammoniac and lead until it has been covered with the melted lead and
is bright as silver. The copper should be filed nearly to a sharp
point.

Capping a Tin Can. Use one tin can for experimenting. By capping and
tipping, heating the cap, and throwing it off and simply putting
another cap on the same can, you can use this one can until you become
proficient in capping.

When