Foil, foil and more foil.
There are several different backings in copper foil, how and when to use them?
The backing is the adhesive side of the foil. If the foil is wrapped around a piece of transparent glass the color backing is visible if you look "inside" the foiled area through the glass. This becomes very visible you patina your solder lines in a different color than the foil backing. So always to match the copper foil with the patina you would like to use on the finished piece.
Black backed foil for black patina.
Copper patina on the copper foil with no color backing
If you plan on leaving the solder in its natural silver color the silver foil will match.
Foil comes in different thicknesses 0,03 mm and 0,04 mm. Which size is best to minimize foil splitting on inside curves?
Thickness really doesn't matter when it comes to foiling inside curves. You can use any of the thicknesses. The trick is to not pull the foil so tight.
Immediately after foiling the inside curve, crimp down the sides gently and ease the foil around the curve.
Fred Hebing
Fred Hebing
